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{{Species-infobox
{{about|the ghost enemies that appear throughout the [[Super Mario (franchise)|''Super Mario'' franchise]]|the [[microgame]] from [[WarioWare: D.I.Y. Showcase]]|[[Boo (microgame)]]|the area in Mario Party 10|[[Boo (area)]]}}
|title=Boo
{{redirect|Boo Buddy|the circular group of Boos|[[Boo Buddies]]}}
|expand=expandable
{{distinguish|Bloo}}
|image=[[File:BooNSMBWii.PNG|200px]]
{{species infobox
|affiliation=[[Koopa Troop]], [[Bowser]], [[King Boo]], [[Lady Bow]], [[Mushroom Kingdom]]
|collapsed=true
|sub_species=[[Big_Boo|Atomic Boo]]<br>[[Balloon Boo]]<br>[[Big Boo]]<br>[[Big & Little Boo]]<br>[[Black Boo]]<br>[[Blindfold Boo]]<br>[[Bomb Boo]]<br>[[Boo Balloon]]<br>[[Boo Buddy Block]]<br>[[Boo Buddy Snake]]<br>[[Boo Buddy Swarm]]<br>[[Boo Guy]]<br>[[Boo Man Bluff]]<br>[[Broozer]]<br>[[Calm Fishin' Boo]]<br>[[Circling Boo Buddies]]<br>[[Dark Boo]]<br>[[Dark Dark Boo]]<br>[[Disappearing Boo Buddies]]<br>[[Eerie]]<br>[[Fishin' Boo]]<br>[[Ghoul Guy]]<br>[[Green Boo]]<br>[[Jelly Ghost]]<br>[[Li'l Boo]]<br>[[Mad Big Boo]]<br>[[Mad Boo]]<br>[[Mini Boos]]<br>[[Red Boo]]<br>[[Sleepy Boo]]<br>[[Stretch]]<br>[[Tail Boo]]<br>[[Terekuribo]]<br>[[The Big Boo]]
|image=[[File:MPS Boo Artwork.png|250px]]<br>Artwork from ''[[Mario Party Superstars]]''
|first_appearance=''[[Super Mario Bros. 3]]'' ([[1988]])
|first_appearance=''[[Super Mario Bros. 3]]'' ([[List of games by date#1988|1988]])
|notable=[[Big Boo]]<br>[[Bigger Boo]]<br>[[Boo Mario]]<br>[[Boo Luigi]]<br>[[Boolossus]]<br>[[Bootler]]<br>[[Creepy Steeple Boo]]<br>[[Franky]]<br>[[Herbert]]<br>[[Igor]]<br>[[King Boo]]<br>[[King Boo (Super Mario Sunshine)]]<br>[[Lady Bow]]<br>[[Lahla]]<br>[[Luigi's Mansion Boos]]<br>[[Peeka]]<br>[[Stanley (Boo)|Stanley]]<br>[[Spooky Speedster]]
|latest_appearance=''[[Super Mario Party Jamboree]]'' ([[List of games by date#2024|2024]])
|latest_appearance=''[[Mario Tennis Open]]'' ([[2012]])
|latest_portrayal=[[Sanae Suzaki]] ([[List of games by date#2004|2004]]-present)
|variants=[[Big & Little Boo]]<br>[[Big Boo]]<br>[[Blindfold Boo]]<br>[[Block Boo]]<br>[[Bomb Boo]]<br>[[Boo Balloon]]<br>[[Boo Buddies]]<br>[[Boo Buddy Snake]]<br>[[Boo Crew]]<br>[[Boo Guy]]<br>[[Boo Stack]]<br>[[Broozer]]<br>[[Dark Boo]]<br>[[Disappearing Boo Buddy]]<br>[[Eerie]]<br>[[Fishing Boo]]<br>[[Frame Boo]]<br>[[Ghost Goomba]]<br>[[Gold Boo]]<br>[[Hammer Knight]]<br>[[High Boo]]<br>[[Jelly Ghost]]<br>[[Mad Boo]]<br>[[Mini Boo]]<br>[[Paper Boo]]<br>[[Paper Macho Boo]]<br>[[Peepa]]<br>[[Red Boo]]<br>[[Stretch]]<br>[[Tail Boo]]
|comparable=[[Yarikuri Obake]]
|notable=[[Boo (Mario Party 4)|Boo (''Mario Party 4'')]]<br>[[Bootler]]<br>[[Captain Boo]]<br>[[The Creepy Steeple Boo]]<br>[[Franky]]<br>[[Herbert]]<br>[[Igor]]<br>[[King Boo]]<br>[[Lady Bow]]<br>[[Lahla]]<br>[[List of Boos in Luigi's Mansion|''Luigi's Mansion'' Boos]]<br>[[List of Boos in Luigi's Mansion: Dark Moon|''Luigi's Mansion: Dark Moon'' Boos]]<br>[[List of Boos in Luigi's Mansion 3|''Luigi's Mansion 3'' Boos]]<br>[[Peeka]]<br>[[Phantom (character)|Phantom]]<br>[[Stanley (Paper Mario)|Stanley]]
}}
}}
{{Quote|Ghosts... ...don't... ...DIE! Heh, heh, heh! Can you get out of here... ...alive?|Boo|Super Mario 64}}
{{quote|Mind turning around for a minute?|Boo|[[Paper Mario: Color Splash]]}}
'''Boos''' (originally known as '''"Boo" Diddlys''',<ref>{{cite|title=''Super Mario Bros. 3'' instruction booklet|page=38|date=1990|publisher=Nintendo of America|language=en-us}}</ref> a nod to American R&B singer {{iw|wikipedia|Bo Diddley}}, and later '''Boo Buddies'''<ref>{{cite|title=''Super Mario World'' instruction booklet|page=24|date=1991|language=en-us|publisher=Nintendo of America}}</ref><ref>{{cite|title=''Yoshi'' (NES) instruction booklet|page=5 and 12|publisher=Nintendo of America|date=1991|language=en-us}}</ref><ref>{{cite|title=''Yoshi'' (Game Boy) instruction booklet|page=4 and 11|publisher=Nintendo of America|date=1991|language=en-us}}</ref><ref>{{cite|author=Miller, Kent and Terry Munson|title=''Super Mario World 2: Yoshi's Island'' Player's Guide|language=American English|date=1995|publisher=Nintendo of America|page=[[media:SMW2 Guide 126.jpg|126]]}}</ref><ref>{{cite|date=January 1998|title=''[[Nintendo Power]]'' Volume 104|author=Tilden, Gail, et al.|page=16|quote=Still haunting the Yoshis, the Boo Buddies bust back onto the scene.|publisher=Nintendo of America|language=en-us}}</ref><ref>{{cite|author=Hodgson, David S J|title=''Super Mario Advance 4: Super Mario Bros. 3'' Prima's Official Strategy Guide|page=19, 35, 45, 56, 57, 66, 71, 82, 85, 97, 102, 103, 104, 121, 122, 125, and 126|publisher=[[Prima Games]]|date=October 21, 2003|language=en-us|isbn=0-7615-4425-9}}</ref> or simply '''Ghosts'''<ref>{{cite|url=play.nintendo.com/news-tips/tips-tricks/mini-mario-friends-amiibo-challenge-items|title=Mini Mario & Friends: amiibo Challenge Items|publisher=Play Nintendo|language=en-us|accessdate=March 31, 2020|archive=web.archive.org/web/20200816215214/https://play.nintendo.com/news-tips/tips-tricks/mini-mario-friends-amiibo-challenge-items|quote=The candle in this contraption scares Ghosts into covering their eyes, so you can safely walk your Mini right through them.}}</ref>) are recurring ghost enemies that first appear in ''[[Super Mario Bros. 3]]''. They are a type of white spherical ghost with menacing and normally open mouths. They are known for their large tongues and small stubby arms. However, the most distinctive characteristic of the Boos is their shy personality, as they cover their faces when someone looks directly at them, but then uncover and move after the character when their back is turned; this exact behavior is used by [[wikirby:Mumbies|Mumbies]] in the ''[[wikirby:Kirby (series)|Kirby]]'' series.


'''Boos''' (originally known as '''"Boo" Diddley''' and later '''"Boo" Buddies''') are common ghost-enemies in the [[Mario (series)|''Mario'' series]] that first appear in ''[[Super Mario Bros. 3]]''. They are a type of white spherical ghost with menacing and constantly open mouths. They are known for their large tongues and small "arms" of some sort. However, the most distinctive characteristic of the Boos is their shy personality where they cover their faces when someone looks them directly at the face but will uncover their faces once the subject turned around. [[Goombario]]'s [[tattle]] for the Boo [[Igor]] in ''[[Paper Mario]]'' states: ''"He probably was a merchant before he became a Boo,"'' implying that current Boos may have once been living beings. It is revealed in ''[[Super Mario Galaxy]]'' that they speak in Booish.
[[Shigeru Miyamoto]] got the idea for Boo from the wife of his coworker and close friend [[Takashi Tezuka]], as she is shy but one day got very angry with him for coming home late from work.<ref>{{cite|author=Stuart, Keith|date=September 13, 2010 - 08:56 EDT|url=www.theguardian.com/technology/gamesblog/2010/sep/13/games-gameculture|title=Super Mario Bros: 25 Mario facts for the 25th anniversary|language=en|publisher=The Guardian|accessdate=May 24, 2024}}</ref><ref>{{cite|url=archive.org/stream/Nintendo_Power_Issue001-Issue127/Nintendo%20Power%20Issue%20080%20January%201996#page/n26/mode/1up|date=January 1996|page=25|title=''Nintendo Power'' Volume 80|publisher=Nintendo of America|language=en-us|author=Tilden, Gail, et al.}}</ref>
==History==
==History==
===''Super Mario'' series===
===''Super Mario'' series===
====''Super Mario Bros. 3====
====''Super Mario Bros. 3'' / ''Super Mario Advance 4: Super Mario Bros. 3''====
[[File: SMB3Boo.jpg|thumb|left|A Boo from ''Super Mario Bros. 3''.]]
[[File:SMB3Boo.jpg|thumb|left|Artwork of a "Boo" Diddly from ''Super Mario Bros. 3'', its debut appearance]]
Boos first appear in ''[[Super Mario Bros. 3]]''. Here, they are referred to as '''"Boo" Diddleys''', a pun off the late rock star [[wikipedia:Bo Diddley|Bo Diddley]]. However, future games refer to them only as Boos. The Boo shields its face if [[Mario]] or [[Luigi]] look at it, but it starts to chase Mario or Luigi if they look away. Boos are unable to be defeated unless the two are equipped with a [[Hammer Suit]], [[Green Shell|Koopa shell]], [[Tanooki Suit]], or [[Starman]]. The game also has [[Stretch|Stretch]]es, which are Boos with very long bodies that live in the Fortresses throughout the kingdom.
"Boo" Diddlys<ref>{{cite|title=''Super Mario Bros. 3'' instruction booklet|page=38|date=1990|publisher=Nintendo of America|language=en-us}}</ref> appear in ''[[Super Mario Bros. 3]]''. They are first encountered in {{world-link|2|fort|World 2-Fortress}}. A "Boo" Diddly shields its face if looked at, but chases the player character if not looked at. "Boo" Diddlys can be defeated only from either the effects of a [[Hammer Suit]] or a [[Super Star|Starman]], or from a [[Koopa Shell|Koopa shell]]. "Boo" Diddlys have a variant, [[Stretch]]es "Boo" Diddlys are depicted with either a dark-blue or dark-red outline in the [[Family Computer]] and [[Nintendo Entertainment System]] version, depending on the level.
{{br}}
 
====''Super Mario World'' / ''Super Mario World: Super Mario Advance 2''====
[[File:SMWBoo.png|frame]]
"Boo" Buddies (called "Boo" Diddlys earlier in development<ref>{{cite|title=[[tcrf:Prerelease:Super Mario World (SNES)/Background Graphics and Tilemaps#Enemy Cast List|Prerelease:''Super Mario World'' (SNES)/Background Graphics and Tilemaps § Enemy Cast List]]|publisher=The Cutting Room Floor|accessdate=August 6, 2020}}</ref> appear in ''[[Super Mario World]]'' and [[Super Mario World: Super Mario Advance 2|its reissue]]. They are encountered in the [[Ghost House]] levels. "Boo" Buddies behave identically but move slower than before, a consistency retained throughout the [[Super Mario (series)|''Super Mario'' series]]. "Boo" Buddies change their face very briefly if looked at for long enough. "Boo" Buddies appear to have multiple tails. Groups of them make a variety of facial expressions. More varieties are introduced in the game, including [[Block Boo|Boo Buddy Block]]s, [[Boo Buddy Snake]]s, [[Boo Crew]]s, [[Boo Buddies|Circling Boo Buddies]], [[Eerie]]s, [[Disappearing Boo Buddy|Disappearing Boo Buddies]], and the [[Big Boo]]. A "Boo" Buddy is defeated only from the effects of [[Super Star]]s or being hit by a [[Grab Block]].
 
====''Super Mario Land 2: 6 Golden Coins''====
Boo Buddies appear in ''[[Super Mario Land 2: 6 Golden Coins]]''. Compared to other games, they move in a slower, wave-like pattern toward Mario. Boo Buddies in this game are found in the [[Pumpkin Zone]]. A thrown [[Green Shell]] can defeat it. A variant named [[Ghost Goomba]]s also appears in this game.
 
====''Super Mario 64'' / ''Super Mario 64 DS''====
{{quote|Ghosts...don't...DIE! Heh, heh, heh! Can you get out of here...alive?|Message from Big Boo's Haunt}}
[[File:Boo 64.png|thumb|120px|left|In-game model from ''Super Mario 64'']]
[[File:SM64DS BigBoo.png|thumb|175px|In-game model from ''Super Mario 64 DS'']]
Boos (also called '''Baby Boos''')<ref>{{cite|author=Prima Bath|date=April 7, 1999|publisher=[[Prima Games]]|isbn=0-7615-2103-8|title=''Nintendo 64 Game Secrets, 1999 Edition'' Prima's Official Strategy Guide|page=84-87}}</ref> appear in ''[[Super Mario 64]]'' and ''[[Super Mario 64 DS]]''. They use their design from ''[[Mario Party 4]]'' in the latter version. Boos are encountered in the [[Courtyard (Peach's Castle)|courtyard]] of [[Peach's Castle]] and in [[Big Boo's Haunt]]. Big Boos are recurring mini-bosses in the latter location, as well as a different [[King Boo|Big Boo]] in the [[Big Boo Battle]] stage in the remake only. When Boos are looked at, they become partially visible, but are fully opaque otherwise and follow the player character. Boos take away two units of [[Health Meter|health]] on contact. The Boos in the courtyard hold a [[coin|Yellow Coin]] each, and those in Big Boo's Haunt each have a [[Blue Coin]]; the remake changes the former instance to [[Red Coin]]s until the player collects all eight and then the [[Power Star]]. Boos are defeated from either a [[punch]], a [[kick]], a [[Ground Pound|Pound the Ground]] attack, or [[Luigi]]'s [[Spin Jump|spin jump]] in the remake only. Boos cannot be defeated by [[Yoshi]] in the remake, and it is spit out if Yoshi attempts to do so.<ref>{{cite|author=Boo|language=en|quote=You...can't...EAT...ghosts! Eee hee hee!|title=''Super Mario 64 DS''|date=2004|publisher=Nintendo}}</ref> A line of dialogue displays each time a Boo is defeated in the [[Go on a Ghost Hunt|first mission]] of Big Boo's Haunt.<ref>{{cite|author=Boo|quote=Ghosts...don't...DIE! Heh, heh, heh! Can you get out of here...alive?|location=Big Boo's Haunt|date=1996|publisher=Nintendo|language=en|title=''Super Mario 64''}}</ref> A Boo appears in the hallway of the Mushroom Castle after twelve Stars are collected, or eight in the remake. By selecting the [[Eye to Eye in the Secret Room|sixth mission]] of Big Boo's Haunt in the remake directly, a Boo wearing a [[Luigi Cap|Luigi's cap]] appears in the stage.
 
====''Super Mario Bros. Deluxe''====
{{multiframe|[[File:Super Mario Bros Deluxe Boo.png]] [[File:SMBDX Green Boo.png]] [[File:SMBD Redboo.png]] [[File:BlackBoo.png]]|The Boos from<br>''Super Mario Bros. Deluxe'',<br>arranged by speed}}
Boos appear in ''[[Super Mario Bros. Deluxe]]''. They are competitors in the "You VS. Boo" mode, competing to reach the [[Goal Pole|flagpole]] before the player can. Boos do not damage the player character on contact. If the Boo is defeated within a time frame, it flies away, being replaced by a faster green Boo, then by a faster red Boo, and lastly a '''Black Boo'''<ref>{{cite|language=en-us|title=''Super Mario Bros. Deluxe'' instruction booklet|page=20|publisher=Nintendo of America|date=1999}}</ref> with a yellow outline. The Black Boo travels in a way mimicking the player's best time.
 
====''Super Mario Sunshine''====
[[File:SMS Boo Artwork.jpg|thumb|left|100px|A Boo from ''[[Super Mario Sunshine]]'']]
Boos return in ''[[Super Mario Sunshine]]''. They have a different design consisting of drooping eyelids, blue circles around their black pupils, and long, coiled tails, due to being made of [[goop]].<ref>{{cite|author=Sakai, Kazuya (Ambit), et al.|language=ja|publisher=[[Shogakukan]]|location=Tokyo|date=October 19, 2015|title=『スーパーマリオブラザーズ百科: 任天堂公式ガイドブック』 (''Super Mario Bros. Hyakka: Nintendo Kōshiki Guidebook'')|page=107|isbn=978-4-09-106569-8}}</ref> They are encountered in [[Sirena Beach]] only, inside of [[Hotel Delfino]]. Two varieties of Boo appear, [[Block Boo|Pink Boo]]s and [[Sleepy Boo]]s, and the boss fought below Hotel Delfino is [[Big Boo (character)|King Boo]]. Boos move around in slow, swooping motions. They do not react if looked at. There are Boos that are mostly invisible, besides a distorted visual effect, but spraying them with water makes them become increasingly visible. The invisible Boos take on disguises such as Yellow Coins or Blue Coins, differentiated only from not spinning at a constant pace, or [[Shadow Mario]], differentiated by appearing lighter colored, lacking the [[magic brush]], and the Shadow Mario theme not playing. If a disguised Boo is approached, it laughs and bumps into Mario, unless it has been sprayed prior.
 
====''New Super Mario Bros.''====
[[File:NSMBDS Boo Sprite.gif|frame|right]]
Boos appear in ''[[New Super Mario Bros.]]'' They are encountered in Ghost Houses and [[World 8-1 (New Super Mario Bros.)|World 8-1]]. They act the same as in ''Super Mario Bros. 3'', though the ways of defeating them include a [[Koopa Shell|Shell]], a [[Super Star|Starman]], a [[Mega Mushroom]], or a [[Blue Shell]]. The game introduces [[Balloon Boo]]s, which inhale air to inflate themselves, and [[Broozer]]s, which are boxers.
 
====''Super Mario Galaxy''====
[[File:Mario Seek.png|thumb|Screenshot from ''Super Mario Galaxy'' showing Mario look at a Boo]]
Boos appear in ''[[Super Mario Galaxy]]''. They are encountered in the [[Ghostly Galaxy]], the [[Bigmouth Galaxy]] (in underwater areas), the [[Deep Dark Galaxy]], and the [[Sand Spiral Galaxy]] only. Boos become transparent when the player character looks at them, but are opaque and go after the player character if they are not looking. A Boo can be defeated mainly from any ray of light, or when touched by [[Rainbow Mario]]. Boos can be spun off course from a spin attack. A large Boo in Deep Dark Galaxy has a [[Power Star]] in it during the secret mission. Varieties that appear include [[Big Boo|Atomic Boo]] and the debuting [[Bomb Boo]]s, and there is a Boo character who is raced, the [[Spooky Speedster]]. One of the power-ups, [[Boo Mario]], has the player character become a Boo, retaining only his face and cap. Boos are attracted to Boo Mario and follow him. If a Boo hits Boo Mario, he does not take damage but does lose the power-up.


====''Super Mario World====
[[Captain Toad]] also indirectly suggests that Boos eat people, as he worried that Luigi might have been eaten by ghosts.
[[File:SMWBoo.png|frame|right]]
In ''[[Super Mario World]]'', there are [[Ghost House]]s, which contain many Boos. These Boos retain their usual pattern of attack from ''Super Mario Bros. 3'' and sometimes make faces at Mario or Luigi. This game also introduces many new sub-species of Boo, such as the [[Boo Buddy Block]], [[Boo Buddy Snake]], [[Boo Buddy Swarm]], [[Circling Boo Buddies]], [[Eerie]]s, and [[Disappearing Boo Buddies]]. It also introduces a giant version of the Boo, the [[Big Boo]], and a ghost-like [[Lakitu]] called a [[Fishin' Boo]].  One Ghost House contains a secret boss, [[The Big Boo (boss)|The Big Boo]].


====''Super Mario 64''/''Super Mario 64 DS====
====''New Super Mario Bros. Wii''====
[[File:Boo 64.png|thumb|120px|left|A Boo in ''Super Mario 64''.]]
Boos return in ''[[New Super Mario Bros. Wii]]''. They are depicted with a blue glow. Boos are encountered in Ghost Houses only. They behave identically as in ''New Super Mario Bros.'' Varieties that appear include [[Big Boo]]s, [[Broozer]]s, and [[Boo Buddies|Circling Boo Buddies]]. Every Ghost House on the world map has a Boo who watches the player character and laughs whenever he either enters or is kicked out from losing a life. Once the level is cleared, the Boo only covers its face henceforth. Boos are defeated only from the effects of a [[Super Star|Star]].
[[File:Big Boo Battle.png|thumb|175px|right|Boos coming at [[Mario]] in ''Super Mario 64 DS''.]]
Boos make a starring appearance in the course [[Big Boo's Haunt]] in ''[[Super Mario 64]]''. A group of Boos can be found in the Castle Gardens (eight of which are holding [[Red Coin]]s in the ''DS'' version). After collecting twelve [[Power Star]]s, Mario is able to enter Big Boo's Haunt by going into the little cage a certain Boo drops; this Boo will be somewhat bigger than the others. He also battles Big Boo three times here. Additionally, when Mario look at the Boos, they attempt to hide by becoming partially transparent, but if Mario is not looking at them, they chase him. If they hit him, he lose two wedges of health. In the translucent Boo, the player can see a [[Coin]] or a [[Blue Coin]]. To defeat them, a punch or kick from behind or the side is needed. They can also be defeated with a [[Ground Pound]] while he is not looking at them. When defeated they give a Blue Coin, but the ones in the Castle Gardens give a normal Coin instead. When defeated in the first mssion, "Go On A Ghost Hunt", the Boos will say, "Ghosts... ...don't... ...DIE! Heh, heh, heh! Can you get out of here... ...alive?" when defeated.


In ''[[Super Mario 64 DS]]'', in Big Boo's Haunt, Mario can find a Luigi painting, which will take him to the [[Big Boo Battle]] level on the balcony. After reaching the end by following the cackle of [[King Boo]], he makes it to a room with a mirror at the end of it. He then has to battle King Boo. However, King Boo is invisible, and the only way for Mario to see it is by looking in the mirror, making it harder to hit the Boo. After hitting it three times, Mario gains the key to the room in which Luigi is imprisoned and proceeds to free him. In the English version of the game, King Boo is erroneously referred to as "Big Boo." Yoshi cannot defeat Boos in this game. Ground Pounding yields no results, and eating them simply causes Yoshi to spit them back out. Fortunately, the mustached [[plumber]]s can hit Boos with ground pounds.
====''Super Mario Galaxy 2''====
Boos appear in ''[[Super Mario Galaxy 2]]''. They behave identically as in ''Super Mario Galaxy''. They are encountered in [[Haunty Halls Galaxy]], [[Boo Moon Galaxy]], [[Battle Belt Galaxy]], and [[Slimy Spring Galaxy]], the latter two having the underwater type. Besides Bomb Boos returning, two variants make their debut: [[Octoboo]]s, a cross between an [[Octoomba]] and Boo, and [[Mega Boo]]s, larger than even Big Boos.


====''Super Mario Bros. Deluxe====
====''Super Mario 3D Land''====
[[File:You_vs._Boo.PNG|frame|The Boos from ''Super Mario Bros. Deluxe'', arranged by speed.]]
Boos appear in ''[[Super Mario 3D Land]]''. They behave similarly as before, but disappear briefly if hit by a tail whip from [[Tanooki Mario]] or one of [[Fire Mario]]'s [[fireball]]s. Their laugh is similar as in ''Super Mario 64''. Aside from Big Boos returning, two more variants are introduced: [[Tail Boo]]s, which have a tanooki tail, and [[Peepa]]s, which move in a set pattern.
While Boos do not appear in the original ''[[Super Mario Bros.]]'', Boos appear in ''[[Super Mario Bros. Deluxe]]'' as the main enemy in the "You VS. Boo" mode. The goal is to reach the [[flagpole]] before the Boo. After defeating Boo a certain amount of times, it flies away, and a [[Green Boo]] replaces it. After that Boo is defeated, a [[Red Boo]] takes its place, and finally, a Black Boo with a yellow outline appears. Each new Boo is faster than the one before it, meaning the plain White Boo is the slowest, while the so-called "Legendary Black Boo" is the fastest and hardest to defeat.


====''Super Mario Sunshine====
====''New Super Mario Bros. 2''====
[[File:booshine.jpeg|thumb|left|A Boo from ''[[Super Mario Sunshine]]''.]]
Boos return in ''[[New Super Mario Bros. 2]]''. They are encountered in Ghost Houses. There are Boos in {{world|4|ghosthousen2}} that push the wall either left or right, and they are not shy of being looked at. Boos otherwise are the same as in ''New Super Mario Bros. Wii'', except they can be defeated from the effects of either a Star or [[Gold Flower]]. Aside from Peepas returning, the game introduces the giant [[Boohemoth]]s and [[Gold Boo]]s, which Boos transform into while a [[Gold Ring]] during the effects of a Gold Ring.  
Boos return in ''[[Super Mario Sunshine]]'', terrorizing the residents of [[Hotel Delfino]]. In this game, they can be stunned by [[F.L.U.D.D.]] and defeated by being jumped on. Boos in this game can also be eaten by Yoshi. They also disguise themselves as [[coin]]s. It turns out that Hotel Delfino has mysterious features, including flipping floor tiles, a magic painting, and a flipping bookcase. Mario treks through the hotel, solving its mysteries. Eventually, he finds [[King Boo (Super Mario Sunshine)|King Boo]] in the basement of the Casino, and Mario has to battle it. He can defeat it by throwing a Chili at it and then throwing another piece of [[fruit]] at it. Mario has to do this three times before King Boo is defeated. Boos can also disguise themselves as [[Shadow Mario]], while the real Shadow Mario runs from Mario. Boo's appearance has just one change, which is blue circles surrounding their black pupils. Red Boos also appear and can be turned into a platform if sprayed by F.L.U.D.D. Also appearing inside the hotel are a new species, known as [[Sleepy Boo]]s. These Boos mostly appear to block passages. F.L.U.D.D.'s water does not affect them; they can be removed by being eaten by Yoshi.
{{br}}


====''New Super Mario Bros.====
====''New Super Mario Bros. U'' / ''New Super Mario Bros. U Deluxe''====
[[File:Booboo.gif|frame|left]]
[[File:BooNSMBU.png|thumb|Artwork from ''New Super Mario Bros. U'']]
Boos also appear in ''[[New Super Mario Bros.]]''. They are found mainly in Ghost Houses, scattered throughout the game as well as World 8-1. They appear like they usually do, shy, and they act the same as in ''Super Mario Bros. 3''. They can only be defeated with a [[Shell]], a [[Starman]] or a [[Mega Mushroom]]. The game also introduces the [[Balloon Boo]], which are normal Boos who could suck up the air, and become much bigger. [[Broozer]], the boxing ghost, first appears in this game as well. An icon of a Boo covers the lower screen in Ghost Houses.
Boos appear in ''[[New Super Mario Bros. U]]'' and [[New Super Mario Bros. U Deluxe|its port]]. They are the same as before, though [[Baby Yoshi]]s can defeat Boos. [[Big Boo]]s and [[Boo Buddies|Circling Boo Buddies]] both also return. Boos appear in an [[Enemy Course]] in the [[Soda Jungle#Haunted Area|haunted area]] of [[Soda Jungle]], where a [[Flying ? Block]] with the Super Star is required to defeat them.


====''Super Mario Galaxy====
====''Super Mario 3D World'' / ''Super Mario 3D World + Bowser's Fury''====
[[File:Mario_Seek.png|thumb|200px|Mario looking at a Boo in ''Super Mario Galaxy''.]]
Boos appear in ''[[Super Mario 3D World]]'' and [[Super Mario 3D World + Bowser's Fury|its port]]. Their only differences are cosmetic, being more transparent, having a blueish glow like in ''New Super Mario Bros. Wii'' and its sequels unless stared at, in which case they have a reddish glow while emitting steam. Big Boos and Peepas also return.
Boos make an appearance in ''[[Super Mario Galaxy]]'' and can be found in the [[Ghostly Galaxy]], the [[Bigmouth Galaxy]], the [[Deep Dark Galaxy]], and the [[Sand Spiral Galaxy]]. Boos act the same way that they did in previous games, such as hiding by turning transparent when Mario looks at them and then following Mario when he looks away. Boos can only be defeated when they are brought under a ray of light (including the Toad Brigade captain's helmet and the light emitted from shells while in the water), and they cannot be defeated by Mario's spin or jump attack. However the spin attack can throw a Boo around Mario, knocking it off course temporarily or into a light. If a Boo spots Mario while he is in the Boo Suit, it falls in attraction with him and follows him, so it may be female. If a Boo hits Mario while he is in the Boo Suit, Mario loses the suit, but does not lose any health. Boos can also be found underwater in the [[Bigmouth Galaxy]] in this game. While underwater, Boos attack just by swimming back and forth, similar to [[Cheep-Cheep]]s, and damage Mario if they touch him. These Boos could be defeated only by pointing at them with the light of a Koopa Shell, and many more would appear after the player enters the central chamber.


An individual Boo named [[Spooky Speedster]] is found in two areas of the game. Mario must race him twice to win a [[Power Star]]. He is raced once in the Ghostly Galaxy and once again in the [[Boo's Boneyard Galaxy]]. This game also introduces a new kind of Boo, called the [[Bomb Boo]]; it is similar to a normal Boo, but is black with yellow eyes and can be grabbed by its tongue if Mario uses his spin attack on it. Spinning again will hammer-toss it into statues and enemies upon which it will blow up on impact destroying the statues and damaging enemies. However, if Mario holds onto the Bomb Boo too long, it will blow up and Mario will take damage. Shaking the [[Wii Remote]] when the Bomb Boo flashes red will make Mario let go of it, thus avoiding taking damage in this manner.
====''Super Mario Maker'' subseries ====
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Boos are course elements in ''[[Super Mario Maker]]'', [[Super Mario Maker for Nintendo 3DS|its port]], and ''[[Super Mario Maker 2]]''. They have newly designed sprites for the ''[[Super Mario Bros.]]'' style, but are otherwise the same as in other entries of the ''Super Mario'' series. Boos can be inserted into [[Bill Blaster]]s, [[Block]]s, a [[Koopa Clown Car]], [[track]]s, or [[Warp Pipe]]s. Boos can be shaken to become Boo Buddies or dragged on to platforms to become [[Stretch]]es. Applying a [[Super Mushroom]] to a Boo changes it into a Big Boo, while giving it wings gives it faster movement. Boos in Koopa Clown Cars affect the vehicle to stop and close its eyes when looked at and sneak up on the player while they are not looking.


====''New Super Mario Bros. Wii====
====''Super Mario Run''====
[[File:3-Ghost_Housensmbwii.PNG|200px|thumb|left|A Boo chasing Mario in ''New Super Mario Bros. Wii''.]]
[[File:SMRBoo.png|frame|right]]
Boos reappear in ''[[New Super Mario Bros. Wii]]'' in various ghost houses that have appeared in ''[[Super Mario World]]'' throughout the game. They behave the same way as they did in ''New Super Mario Bros'' and they are invincible, unless the player has a [[Star]] power-up. [[Big Boo]]s also reappear along with [[Broozer]]s. [[Circling Boo Buddies]] can also be found in a small amount of ghost houses in the game. Despite their concept art, they appear with a blue glow as opposed to plain white in this game, giving off a more spectral appearance. In the map, a single Boo will be watching Mario, and will taunt Mario as he enters. If Mario gets tossed out, the Boo will laugh. However, once the level is beaten, the Boo will cover its face for the rest of the game.
Boos appear in ''[[Super Mario Run]]''. They are encountered in Ghost House levels. Boos cover their eyes and float up and down while looked at, including if they are close to the player's vertical position, and turn to look at the player character. Boos otherwise follow in a quick, wavy motion. Boos are defeated by either jumping backward over them using a [[Backflip Block]] or a [[Wall Jump]]. The pink [[P Switch]] of certain levels defeat every Boo on-screen. Boos drop [[Key]]s, [[Coin]]s, or [[Color coin]]s upon defeat, with the item being slightly visible before their defeat. Boos in the level [[Dark and Stormy]] are defeated whenever lightning strikes happen. Boo cannot leveled. Besides Boos, Stretches also return.
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====''Super Mario Galaxy 2====
There is a [[List of Kingdom Builder items in Super Mario Run|Boo Statue]] in Kingdom Builder, which has an interaction where it briefly covers its eyes.  
[[File:Mg10.jpg|thumb|Boos alongside a [[Big Boo]] in the [[Haunty Halls Galaxy]] in ''Super Mario Galaxy 2''.]]
Boos reappear in the game ''[[Super Mario Galaxy 2]]''. They behave the same way they did in its predecessor. They are found in haunted levels such as [[Haunty Halls Galaxy]] and [[Boo Moon Galaxy]]. The underwater Boos from the prequel also appear in this game, in the [[Battle Belt Galaxy]] and [[Slimy Spring Galaxy]]. Bomb Boos and Big Boos also appear.
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====''Super Mario 3D Land====
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[[File:3DS_SuperMario_10_scrn10_E3.png|thumb|left|A Boo chasing [[Fire Mario]].]]
Boos later appear in ''[[Super Mario 3D Land]]''. In the game, they retain their normal battle strategy, which is chasing [[Mario]] when he looks away while sticking its tongue out. Boos in this game also momentarily disappear when hit with [[Fire Mario]]'s fireballs and [[Tanooki Mario]]'s tail whips. Boos also laugh in their original phonic from ''[[Super Mario 64]]''. Some Boos have Tanooki tails; these are called [[Tail Boo|Tail Boos]]. They act like normal Boos, but, when they stop moving when Mario looks at them, they will swing their tails once, which can damage Mario. Big Boos also appear during the game. Another subspecies of Boo is also introduced, called [[Peepa]]s. They do not act like normal Boos, instead moving around a set position, and do not halt when Mario looks at them. They act the same as they do in ''[[Super Mario Galaxy]]''.
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===''The Adventures of Super Mario Bros. 3===
====''Super Mario Bros. Wonder''====
[[File:CartoonBoo.jpg|thumb|right|A Boo in ''[[The Adventures of Super Mario Bros. 3]]''.]]
[[File:SMBWKingBoo.png|thumb|King Boo with several other Boos in ''Super Mario Bros. Wonder'']]
Boos made infrequent appearances in ''[[The Adventures of Super Mario Bros. 3]]'' television series, which depicted them as having a somewhat more menacing appearance. Like in the game the show was based on, Boos worked for Bowser and often aided him in causing trouble. An example of this is seen in the episode "[[Reign Storm]]", in which Bowser has several Boos terrorize the new Mushroom Shopping Mall. In this episode they were referred to as 'Boodidlies' which was their original name before it became Boo.
Boos are enemies in ''[[Super Mario Bros. Wonder]]''. They are designed similarly to their older artworks but still stick their tongues out. Boos behave identically as before, and are defeated upon contact with rays of light, like in ''Super Mario Galaxy''. Besides Boos, [[King Boo]] appears during one of the [[Wonder Effect]]s.
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===''Super Mario World'' television series===
===DIC cartoons===
[[File:aboo.jpg|thumb|A Boo in the ''Super Mario World'' television series.]]
====''The Adventures of Super Mario Bros. 3''====
In ''[[Super Mario World (television series)|Super Mario World]]'', Boos, who were completely redesigned, appear in the episodes "[[Ghosts 'R' Us]]", in which a gang of Boos, as well as a Big Boo, appear to chase [[Yoshi]] through [[Wizardheimer's Haunted House]], "[[The Night Before Cave Christmas]]", and when Yoshi sees one and he runs off screaming, and "[[The Yoshi Shuffle]]" in where several boos appeared in the audience during the episode. They are referred to as Ghosts.
[[File:CartoonBoo.jpg|thumb|A "Boo" Diddly in ''The Adventures of Super Mario Bros. 3'' episode "[[Reign Storm]]".]]
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Boos appear infrequently in ''[[The Adventures of Super Mario Bros. 3]]''. They are depicted with red eyes and yellow teeth. "Boo Diddlys" in the episode "[[Reign Storm]]" assist King Koopa by terrorizing the Mushroom Shopping Mall.  


===''Super Mario Adventures===
Two Boo Diddlys appear in "[[Misadventures in Babysitting]]", where they are found in the dungeon sneaking behind and spooking [[Junior (The Adventures of Super Mario Bros. 3)|Junior]]. The same Boos are scared off by Luigi who makes a scary face at them. They are seen once more fleeing from lava caused by [[Ludwig von Koopa|Kooky]].
In ''[[Super Mario Adventures]]'', a horde of Boos appear to attack Mario and Luigi when they are tricked into a haunted house by Bowser and the Koopalings. Mario and Luigi become trapped by the Boos and a Big Boo, who are held at bay by the bros staring at them in the face. Eventually, nearing exhaustion, Mario races to a nearby room, dragging Luigi while being chased by the Boos. Upon barging into this room, the Boos and Big Boo find Mario [[Dr. Mario (character)|dressed as a psychiatrist]] with Luigi as his nurse. After some talking, Mario and Luigi manage to reform the Boos and the Big Boo, while learning they were bullied in their youth and that is why they act so nasty to everyone. These Boos and their Big Boo leader were last seen happily waving goodbye to Mario, Luigi and Yoshi as they left the haunted house, which the Boos led them out of. Boos also make an appearance at Peach's wedding.


===''Super Mario-Kun===
====''Super Mario World'' television series====
[[File:SMK25.jpg|thumb|left|Lady Bow as seen on the cover of ''Super Mario-Kun'' issue 25.]]
[[File:SMWTV Yoshi and Boo.jpg|thumb|left|Yoshi encountering a ghost in the ''Super Mario World'' television series episode "[[The Night Before Cave Christmas]]".]]
Boos make appearances in some of the ''[[Super Mario-Kun]]'' comics. A Boo appears on the cover of the sixteenth issue. This issue is based on ''[[Super Mario 64]]''. Alongside it, [[Eyerok]], a [[Bob-omb]], and [[Bowser]] can be seen. Throughout the comic, they appear, too. Their role in the comic is similar to their role in the game, where they are enemies to Mario and attempt to attack him. [[Lady Bow]], a notable boo, appears in a couple of the ''[[Paper Mario]]'' based issues. These issues are 25 and 27. Lady Boo appears on the cover of the twenty-fifth issue along with  many of [[Mario]]'s other partners, including [[Goombario]], [[Kooper]], [[Eldstar]], and [[Twink]]. Besides appearing on the cover, she appears throughout the comic. Her role in the comic mimics her role in the game. Lady Boo reappears on the cover of the twenty-seventh issue and in the comic. Like in issue 25, Lady Boo's role in the comic is similar to her appearance in the game, where she helps Mario. In a ''[[Super Mario Galaxy]]'' based issue, [[Boo Mario]] appears on the cover along with more of Mario's transformations.
Ghosts, as they are called, appear in the episodes "[[Ghosts 'R' Us]]," "[[The Night Before Cave Christmas]]," and "[[The Yoshi Shuffle]]" of ''[[Super Mario World (television series)|Super Mario World]]''. They are designed much differently than in the previous show, being depicted similarly to their in-game sprite. "Ghosts 'R' Us" features a group of ghosts and a Big Boo chasing [[Yoshi]] through [[Wizenheimer]]'s haunted house. "The Night Before Cave Christmas" includes ghosts that scare Yoshi away. "The Yoshi Shuffle" includes ghosts in the audience at the start of the episode.
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===''Nintendo Adventure Books===
===''Nintendo Adventure Books''===
[[File:Capers.jpg|thumb|Boos chasing Luigi on the front cover of ''[[Koopa Capers]]'', the fourth of the ''Nintendo Adventure Books'']]
In ''[[Koopa Capers]]'', a Boo confronts Luigi if he decides to simply look through a keyhole in a fortress door, instead of barging through it. If Luigi decides to run away from it immediately, he will successfully escape, but if he decides to stand his ground, the Boo will chase him onto some floating blocks after he dodges its attack. Making a beeline for the door after mounting the blocks will allow the Boo to catch Luigi, but doing evasive techniques will allow him to escape it. When he begins his descent into the Magma Pit, Luigi will hear a Boo behind him, which causes him to pick up the pace, and escape it.
In ''[[Koopa Capers]]'', a Boo confronts Luigi if he decides to simply look through a keyhole in a fortress door, instead of barging through it. If Luigi decides to run away from it immediately, he will successfully escape, but if he decides to stand his ground, the Boo will chase him onto some floating blocks after he dodges its attack. Making a beeline for the door after mounting the blocks will allow the Boo to catch Luigi, but doing evasive techniques will allow him to escape it. When he begins his descent into the Magma Pit, Luigi will hear a Boo behind him, which causes him to pick up the pace, and escape it.


Illustrations of a Boo are used in puzzles in ''[[Dinosaur Dilemma]]'' and ''[[Flown the Koopa]]'', though none appear in the actual stories.
Illustrations of a Boo are used in puzzles in ''[[Dinosaur Dilemma]]'' and ''[[Flown the Koopa]]'', though none appear in the actual stories.


===''Mario and the Incredible Rescue===
===''Super Mario World: Mario to Yoshi no Bōken Land''===
[[File:MarioAndIncredibleRescue.jpg|thumb|120px|right|Two Boos on the cover of ''Mario and the Incredible Rescue''.]]
[[File:SMWM&YALBoos.png|thumb|left|Boos swarming Luigi, Yoshi, and Mario from ''Super Mario World: Mario to Yoshi no Bōken Land'']]
Boos make an appearance in the chapter book, ''[[Mario and the Incredible Rescue]]''. The cover features two Boos. One of the Boos is from ''[[Mario Kart: Super Circuit]]'' and the other is a mirrored Boo from ''[[Luigi's Mansion]]''. They are known as "ghosts" in the book. Boos capture [[Princess Peach]] and take her to [[Bowser's Castle]]. Mario also sees a vision of Princess Peach  being caged and surrounded by six Boos. Boos are eventually defeated by Mario at the end of the book. To defeat them, Mario casts a spell on them and sends them flying out of the castle.
In the interactive OVA ''[[Super Mario World: Mario to Yoshi no Bōken Land]]'', Boos appear in a [[Ghost House]] that [[Mario]], [[Luigi]], and [[Yoshi]] are passing through. A Boo starts following Luigi, who is in the back, but every time he turns around, it disappears. Finally, he quickly does a double take, and turns just in time to see it re-materialize. He panics and Boos start swarming the group. Mario grabs a candle and lights it, which repels the Boos, and one drops a key they need to progress.
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===''Yoshi''===
Boo Buddies are objects in ''[[Yoshi (game)|Yoshi]]''. They are one of six types of objects to fall on the play field. Boo Buddies are depicted similarly as in ''[[Super Mario World]]''.


===''Mario Kart'' series===
===''Mario Kart'' series===
====''Super Mario Kart====
====''Super Mario Kart''====
Boos made their first appearance in the ''[[Mario Kart (series)|Mario Kart]]'' series, in ''[[Super Mario Kart]]''. Though not as obstacles, they only appear in three race courses. These courses are [[Ghost Valley 1]], [[Ghost Valley 2]], and [[Ghost Valley 3]]. In each race, they just laugh when the player drives by. They also appear as items, known as "Ghosts". When the player uses it, he/she will become transparent temporally, while the "Ghost" steals the opposing players item, if available. It's only obtainable in 2 player mode.
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|[[File:SMK Boo Item Box Sprite 1.png]]<br>[[File:SMK Boo Item Box Sprite 2.png]]
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'''Ghosts'''<ref>{{cite|date=1992|publisher=Nintendo of America|title=''Super Mario Kart'' instruction booklet|page=14|language=en}}</ref> are items in "2 Player" mode and background elements of [[SNES Ghost Valley 1|Ghost Valley 1]] [[SNES Ghost Valley 2|Ghost Valley 2]], and [[Ghost Valley 3]] in ''[[Super Mario Kart]]''. Using a Ghost item makes the user become transparent temporarily as the Ghost steals any item available from an opponent. Ghosts in the background laugh as the player character drives by.
 
====''Mario Kart 64''====
[[File:BooMK64.png|frame|left]]
Boos (named '''Ghost Bonuses''' on one occasion<ref>{{cite|title=''Nintendo Magazine System'' (AU) Issue 49|date=April 1997|publisher=Catalyst Publishing|language=en-au|page={{file link|NMS Australia 49 MK64 drivers and items.jpg|39}}}}</ref>) are items as well as background elements of [[N64 Banshee Boardwalk|Banshee Boardwalk]] and [[N64 Rainbow Road|Rainbow Road]] in ''[[Mario Kart 64]]''. Boos can be obtained by racers in one of the top two positions. When used, a Boo makes the user both invisible and invincible temporarily as it selects an opponent to steal an item from, unless the racers have no items. A player character affected by a Boo can pass any items, course obstacles, and racers by going through them.
 
====''Mario Kart: Super Circuit''====
[[File:MKSC Boo Alternate Artwork.jpg|thumb|Artwork from ''Mario Kart: Super Circuit'']]
Boos, also named "ghosts",<ref>{{cite|author=Walsh, Doug|date=August 21, 2001|isbn=0-7440-0091-2|title=''Mario Kart: Super Circuit'' Official Racing Guide|publisher=BradyGames|page=92}}</ref> are items, background characters in [[GBA Boo Lake|Boo Lake]], and obstacles in [[Broken Pier]] in ''[[Mario Kart: Super Circuit]]''. When used as an item, the Boo makes the user invisible for about five seconds and slows down the leading racer. A CPU can now use a Boo to potentially steal the player's item and coins. The transparency effect lasts for five seconds. The Boos in Boo Lake hold candles to guide player characters, while the Boos on Broken Pier take the coins


====''Mario Kart 64====
====''Mario Kart: Double Dash!!''====
Boos are used as an item, in ''[[Mario Kart 64]]''. When activated, the Boo selects a racer with the best item in reach, and steals the item and gives it to the player that released it. At the same time, the player turns invisible and therefore is completely invulnerable for a short period of time. While invisible, the player can pass the other racers more easily by simply going through them. If no other players have any items, the Boo will return empty handed. Boos also appear in the course [[Banshee Boardwalk]].
Boos make a cameo in ''[[Mario Kart: Double Dash!!]]''. They are visible in portraits within the battle course [[GCN Luigi's Mansion|Luigi's Mansion]]. [[King Boo]] has a much larger role, being a playable character.
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====''Mario Kart: Super Circuit====
====''Mario Kart Arcade GP'' subseries====
[[File:MKSCBoo.jpg|thumb|right|A Boo from ''Mario Kart: Super Circuit''.]]
[[File:MKAGPDX Boo.png|thumb|120px|left|Boo item from ''Mario Kart Arcade GP DX'']]
[[File:BrokenPier.png|thumb|left|Boos attacking [[Toad]] in Broken Pier.]]
Boos are items in ''[[Mario Kart Arcade GP]]'', ''[[Mario Kart Arcade GP 2]]'', and ''[[Mario Kart Arcade GP DX]]''. A Boo slows whomever it hits temporarily. The item has a variation titled '''Triple Boo'''.
Boos appear as items, again, in ''[[Mario Kart: Super Circuit]]''. When activated, they can also slow down the leading racer. Boos also appear in two new courses, [[Boo Lake]] and [[Broken Pier]]. In Boo Lake, Boos hold candles which guide the player through the track. In Broken Pier, they attack the players and take their [[Coin|coins]]. Ghost Valley 1, Ghost Valley 2 and Ghost Valley 3 also reappear with Boos in it.
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====''Mario Kart DS''====
Boos, named '''Boo Hoo''' in British English,<ref>{{cite|title=''Mario Kart DS'' European English instruction manual|url=cdn02.nintendo-europe.com/media/downloads/games_8/emanuals/nintendo_ds_21/Manual_NintendoDS_MarioKartDS_EN.pdf|format=PDF|date=2005|language=en-gb|page=12}}</ref> are items, background characters in {{classic-link|N64|Banshee Boardwalk}}, and cameo in portraits in [[DS Luigi's Mansion|Luigi's Mansion]] in ''[[Mario Kart DS]]''. When used, a Boo makes the user partly invisible while stealing an item from the nearest racer. Using a Boo item does not slow the user while on offroad surfaces. Boos are obtainable by racers between 3rd to 7th place. The Boos in {{classic-link|N64|Banshee Boardwalk}} only let out a laugh as a player character drives by.


====''Mario Kart Arcade GP====
====''Mario Kart Wii''====
Boos appear as items in the arcade game, ''[[Mario Kart Arcade GP]]''. A Boo appears as a basic item. It causes whoever is hit by it to slow down temporarily. There is also a new item called the '''Triple Boo'''.  
Boos are background characters in the course {{classic-link|SNES|Ghost Valley 2}} and cameo in [[Bowser's Castle (Mario Kart Wii)|Bowser's Castle]] in ''[[Mario Kart Wii]]''. In the former, they only laugh as racers drive by before disappearing eventually, while in the latter, artwork of Boo and [[Dry Bones]] from ''[[Mario Party 7]]'' is shown. King Boo has a much larger role again as a playable character.


====''Mario Kart DS====
====''Mario Kart 7''====
In ''[[Mario Kart DS]]'', Boos reappear as items. The only difference is, they do not slow down the leading racer. Also, using the Boo won't affect off-road racing, so various shortcuts can be made. Some pictures of Boos from the game, ''[[Luigi's Mansion]]'', appear in the [[Luigi's Mansion (place)#Mario Kart DS|Luigi's Mansion]] race course. [[Banshee Boardwalk]] reappears as a race, along with the Boos. They do not do anything that effects the racers, they just laugh when a racer drives by
Boos are background characters of the course {{classic-link|DS|Luigi's Mansion}} and spectators on [[3DS Toad Circuit|Toad Circuit]] and {{classic-link|N64|Luigi Raceway}} in ''[[Mario Kart 7]]''. The Boo portraits in {{classic|DS|Luigi's Mansion}} replace every portrait ghost portrait, and they push against their paintings as player characters drive nearby.


====''Mario Kart Arcade GP 2====
====''Mario Kart 8'' / ''Mario Kart 8 Deluxe''====
Boos reappear in the arcade game, ''[[Mario Kart Arcade GP 2]]''. Like what they do in ''Mario Kart Arcade GP'', they slow down the leading racer. Though, the '''Triple Boos''' do not appear in this game, even though it appears in the prequel.
[[File:Hammer Knight MK8D.jpg|thumb|A Boo inside a Hammer Knight from ''Mario Kart 8'']]
[[File:MK8D Luigi and Boo Item Screenshot.png|thumb|left|Luigi holding a Boo from ''Mario Kart 8 Deluxe'']]
Boos are obstacles in the course [[Twisted Mansion]] in ''[[Mario Kart 8]]'' and ''[[Mario Kart 8 Deluxe]]'' as well as items in the latter. The Boos near the gliding section of Twisted Mansion can be landed on, and the course also has [[Hammer Knight]]s towards the end. Boos also float around in {{classic-link|GCN|Luigi's Mansion}} in ''Mario Kart 8 Deluxe'' and {{classic-link|GBA|Boo Lake}} in the ''[[Mario Kart 8 Deluxe – Booster Course Pass]]'', replacing candle Boos from the original iteration in the latter course.


====''Mario Kart Wii====
As items, Boos steal an item from a random opponent in front of the user, even if they are under invincibility effects. They can no longer be used to take off-road shortcuts. If there is no item to steal, the Boo gives the user a Mushroom. Only one Boo can be used on a course at once, excluding if an opponent is still under invisibility effects. A Boo can steal any timed or multiple usage item, except for a [[Crazy Eight]], [[Piranha Plant]], or [[Bullet Bill]], and the duration or usage is not carried over to the player character.<ref>{{cite|author=Mankalor|date=May 8, 2017|title=Mario Kart 8 Deluxe Tips - Boo Item Analysis|url=youtu.be/OUdaqb7Cj2I|publisher=YouTube|accessdate=May 9, 2017}}</ref>
[[File:GhostValleyWii.jpg|thumb|right|Boos from the track Ghost Valley 2 in ''Mario Kart Wii''.]]
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Boos do not appear as items in ''[[Mario Kart Wii]]'', but [[King Boo]] appears as a playable character. However, Boos do appear in a returning course, Ghost Valley 2. Like their original appearance in the track, Boos only laugh when racers drive by, but they eventually disappear. Boo also makes a cameo in Bowser's Castle. At the end of the track Boo's ''Mario Party 7'' artwork can be seen along with Dry Bone's artwork.


===''Mario Baseball'' series===
====''Mario Kart Tour''====
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[[File:MKT Boo Wooden Cutout.png|thumb|A wooden cutout of two Boos in ''Mario Kart Tour'']]
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Boos are non-playable characters in ''[[Mario Kart Tour]]''. They are encountered in [[SNES Ghost Valley 1]], [[SNES Ghost Valley 2]], [[GBA Boo Lake]], [[DS Luigi's Mansion]], and [[RMX Ghost Valley 1]], behaving identically as before. [[Wooden cutout]]s of Boos also appear in the Ghost Valley courses and DS Luigi's Mansion. In every [[Halloween Tour]] since 2020, the [[Autumn Tour (2021)|2021 Autumn Tour]] and the [[Battle Tour]], [[Jack-o'-lantern]]s are scattered throughout the courses, some of which had Boo faces. King Boo returns as a playable character. A glider known as the [[Boo Masks]], based on Boos, is the signature glider of [[Princess Peach|Peach (Yukata)]].
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|caption1='''Boo''' prepares to bat in ''Mario Super Sluggers''.
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|caption2=[[Mini Boos]] being used in ''Mario Super Sluggers''.
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Boo makes its first baseball appearance in ''[[Mario Superstar Baseball]]''. It is on Wario's team as a starter. Boo is tied with Peach with its pitching, losing only to [[Bowser]] and [[Waluigi]]. Its special running and fielding move is a [[Super Jump]]. The only worse fielder in the game is [[Bowser]].


Boo makes another appearance in ''[[Mario Super Sluggers]]''. It is on Wario's team once again, and it can be unlocked in Wario City by finding it in between boxes and completing its challenge. Like its predecessor, Boo has the highest ranked pitch in the game, along with Peach (9/10), but its other stats range from average to low. Boo displays good chemistry with [[King Boo]], [[Shy Guy]], [[Magikoopa]], and [[Blooper]]. Its chemistry with [[Luigi]], [[Baby Mario]] and [[Baby Luigi]], is bad.
====''Mario Kart Live: Home Circuit''====
Boos are obstacles in the course [[Boo Fortress]] in ''[[Mario Kart Live: Home Circuit]]''. They frighten any player who hits them.
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===''Yoshi's Cookie''===
Boos are opponents in ''[[Yoshi's Cookie]]''. They are one of the opponents ranked on the easy difficulty. [[Eerie]]s and [[Fishing Boo|Fishin' Boo]]s both return.


Also, a new item, called Mini Boos, appears. When activated, Mini Boos turn the ball invisible for a short period of time. If use against a NPC, the player will stop moving until the boos go away. If used when a special hit is effect, the boos do nothing.
===''Super Mario Adventures''===
Boos are antagonists in ''[[Super Mario Adventures]]''. A horde of them attack Mario and Luigi after the two are tricked into entering a haunted house. The Boos and a Big Boo trap the Mario Bros. but are held at bay from being stared at. The Boos continue going after a nearly exhausted Mario as he drags Luigi. The Boos and Big Boo find Mario [[Dr. Mario|dressed as a psychiatrist]] with Luigi as his nurse after barging in. The Boos and the Big Boo are reformed by Mario and Luigi after some discussion, and it is revealed that the Boos were mean since they were bullied. The Boos and Big Boo lastly lead Mario, Luigi, and Yoshi out of the haunted house, waving goodbye to them. Boos are also present during [[Princess Peach|Toadstool]]'s wedding.
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===''Super Mario Land 2: 6 Golden Coins===
===''Super Mario Bros.'' film===
[[File:Boosprite.PNG|frame|left]]
While Boos do not physically appear in the 1993 [[Super Mario Bros. (film)|''Super Mario Bros.'' film]], a [[:File:VoteKoopaFilm.png|sign saying "NOW PLAYING BOO DIDLEY"]]{{sic}} can be seen in [[Dinohattan]].
Boos appear in ''[[Super Mario Land 2: 6 Golden Coins]]''. These Boos are relatively unchanged from the previous Boos from ''[[Super Mario Bros. 3]]''. Boos in this game are found in the [[Pumpkin Zone]]. A thrown [[Green Shell]] can defeat it. A new sub-species named [[Terekuribo]]s, which are a species of undead Goombas, also appears in this game.


===''Hotel Mario===
===''Yoshi's Safari''===
[[File:BooHotelMario.jpg|thumb|left|75px|A Boo from ''Hotel Mario''.]]
[[File:YoshiSafariBoo65.png|thumb|left|A Big Boo from ''Yoshi's Safari'']]
Boos also appear in the game ''[[Hotel Mario]]'', though exclusively under the name of '''Boo Buddies'''. There are two types of Boos in this game. One type stays visible and does not hurt Mario until transparency is achieved, at which they can harm the heroic plumber. The other type of Boo uses the traditional attack method and turns invisible when looked at, and attacks Mario when his back is turned.
Boos<ref>{{cite|title=''Yoshi no Road Hunting'' instruction booklet|language=ja|date=1993|publisher=Nintendo|page=21}}</ref> (misnamed "Big Boo" in the English manual<ref>{{cite|title=''Yoshi's Safari'' instruction booklet|page=20|language=en-us|publisher=Nintendo of America|date=1993}}</ref>) are enemies in ''[[Yoshi's Safari]]'', where they are encountered only in [[Ghost Mansion]]. Unlike most enemies in the game that can be shot with the [[Super Scope]] to be defeated, shooting a Boo stops it in its tracks. While stunned, [[Yoshi]] can then run into it to defeat it. Defeating a Boo adds 500 points to the player's score (1,000 in Hard Mode), the highest amount of points earned from regular enemies. A [[Big Boo]] serves as the boss for the level.
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===''Yakuman DS===
===''Mario Bros.'' series===
[[File:YakumanDS CharacterSelection.jpg|thumb|right|Boos on the character selection screen in ''Yakuman DS''.]]
====''Mario Bros.''====
Boos appear in the Japan-only [[Nintendo DS]] game, ''[[Yakuman DS]]''. They are one of the many opponents. Other opponents include, [[Goomba]], [[Diddy Kong]], and [[Hammer Bro.]]. Boos are not unlockable or playable. They are opponents from the start of the game.
[[File:MBSNES Boo.png|frame|left]]
Boos are enemies in the [[Battle Game (Super Mario All-Stars)|Battle Game]] of the ''[[Super Mario All-Stars]]''{{'}}s ''[[Super Mario Bros. 3]]'' remake. They replace [[Fireball (obstacle)|fireball]]s.
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===''Tetris DS===
====''Mario Clash''====
Boos also appear in the [[Nintendo DS]] game, [[Tetris DS]]. They are one of the few multiplayer items. Other items include, [[Mushroom]]s and [[Lightning]]. Boos are able to block the opponents sight of the upcoming block, making it harder for the opposing player to see the upcoming block. They do not appear in single player.
[[File:Big Boo Artwork - Mario Clash.png|thumb|Artwork from ''Mario Clash'']]
Boos<ref>{{cite|title=マリオクラッシュ (''Mario Kurasshu'') instruction booklet|page=20|date=1995|publisher=Nintendo|language=ja}}</ref> (misnamed "Big Boo" in the English manual<ref name=ClashBoo>{{cite|title=''Mario Clash'' instruction booklet|page=21|date=1995|publisher=Nintendo of America|language=en-us}}</ref>) are enemies in ''[[Mario Clash]]''. Boos can become transparent and therefore invulnerable, but while opaque, Boos are vulnerable to being defeated by a [[Koopa Shell|Turtle Shell]]. Boos are referred to by feminine pronouns in localized manuals.<ref name=ClashBoo/>


===''Yoshi'' series===
===''Hotel Mario''===
====''Yoshi====
[[File:HM Boo.png|thumb|left|A Boo from ''Hotel Mario'']]
[[File:BooY.jpg|thumb|left|100px|A Boo from ''Yoshi''.]]
'''Boo Buddies'''<ref>{{cite|title=''Hotel Mario'' instruction book|page=16|date=1994}}</ref> are enemies in ''[[Hotel Mario]]''. Besides behaving similarly as in the platforming games, Boos wander diagonally while the player character is in an elevator. Some other Boos are normally transparent and wander in a similar manner, regardless of where the player character is looking, and sometimes become visible and quickly charge at him.
Boos make an appearance in ''[[Yoshi (game)|Yoshi]]''. They are enemies in the A Type part of the game, as well as the B Type. Boos are not main enemies in the game, as they simply make appearances throughout some parts of the game. Boo's sprite in the game is similar to its sprite from ''[[Super Mario Bros. 3]]''. Many of the other enemies' sprites also are similar to their sprites from ''Super Mario Bros. 3''.
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====''Yoshi's Cookie====
===''Mario's Picross''===
In ''[[Yoshi's Cookie]]'', Boos return as enemies to [[Yoshi]]. Though in this game, they are depicted as one of Yoshi's "opponents". They are among the easy opponents, the others being [[Goomba]], [[Cheep Cheep]], [[Koopa Paratroopa|Paratroopa]], and [[Spiny]]. Two sub-species of Boo, [[Eerie]] and [[Fishin' Boo]] appear, too.  
Boo Diddly is one of the pictures in the "Early Picross" stage in level 6C in ''[[Mario's Picross]]''.


====''Yoshi's Safari====
===''Yoshi's Island'' series===
[[File:YoshiSafariBoo65.png|thumb|left|A Boo from ''Yoshi's Safari''.]]
[[File:Bigger Boo SMW2YI Artwork.png|thumb|left|Boos in ''[[Super Mario World 2: Yoshi's Island]]'' have smaller eyes and thinner eyebrows compared to its contemporary depictions, as well as bottom fangs. This design is later used in the first three installments in the ''[[Paper Mario (series)|Paper Mario]]'' series.]]
In ''[[Yoshi's Safari]]'', Boos appear as enemies. They first and only appearance throughout the game is  in the [[Ghost House#Yoshi's Safari|Ghost Mansion]], a level in the [[Dark Realm]]. A [[Big Boo]] serves as the boss for the level. Just like any other enemy in the game, [[Yoshi]] must shoot the Boos with his [[Super Scope]].
Boos are enemies in ''[[Super Mario World 2: Yoshi's Island]]'' and [[Yoshi's Island: Super Mario Advance 3|its port]]. They are first encountered in [[World 2 (Super Mario World 2: Yoshi's Island)|World 2]]. Boos can be defeated only by looking away and making an [[Yoshi's Egg|egg]] bounce off of a wall after it is thrown, hitting the ghost in the face. [[Kamek]] turns one Big Boo into [[Bigger Boo]], which serves as a mini boss and grows in size every time he is hit by an egg. The game introduces two variants: [[Boo Balloon]]s, which yield items when they pop, and [[Blindfold Boo|Boo Man Bluff]]s, blindfolded Boos that rely to noise to locate the player character.


====''Super Mario World 2: Yoshi's Island====
Boos appear in both sequels, ''[[Yoshi's Island DS]]'' and ''[[Yoshi's New Island]]'', behaving identically as in ''Super Mario World 2: Yoshi's Island'' and being able to be defeated in the same way as before. In ''Yoshi's Island DS'', there is also a Boo-like midboss in [[Hector the Reflector]]. Boos in ''Yoshi's New Island'' first appear in [[Beware the Boo Brigade]] and retain their laugh from ''Super Mario 64''.
[[File:YIBoo.png|frame|right]]
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Boos first appear chronologically as antagonists to [[Yoshi]] in ''[[Super Mario World 2: Yoshi's Island]]''. They are first seen in World 2, which features numerous ghastly creatures. They are underlings for [[Kamek]], the head of the [[Magikoopa|Magikoopas]], who turns one Boo into [[Bigger Boo]], which grows in size every time he is hit by an egg. It serves as a minor boss. The main boss of World 2 is also a Boo-like creature, [[Roger the Potted Ghost]], who is a normal flower pot, until Kamek makes him giant, and transforms it into a living creature. The game also features the [[Boo Blah]], a spectacle Boo exclusive to this game. The only way to defeat Boos is by looking away and then make a egg bounce off a wall after it is thrown, hitting the ghost in the face.
===''Super Mario RPG: Legend of the Seven Stars''===
[[File:SMRPG Big Boo Artwork.png|thumb|Artwork from ''Super Mario RPG: Legend of the Seven Stars'']]
Boos return during the events of ''[[Super Mario RPG: Legend of the Seven Stars]]'' and [[Super Mario RPG (Nintendo Switch)|its remake]]. In the original game, the English translation erroneously calls them "The Big Boo", whereas the remake simply calls them Boos. In the Japanese version, they are, in fact, referred to as Teresa as they are in other games. These Boos, like other Boos that appear in previous games, hide behind their arms when stared at. However, some Boos teleport around the room, attempting to scare Mario and his friends. Boos live in [[Kero Sewers]] along with many other ghouls, including [[Hobgoblin]]s and [[Shadow]]s. Often, these three undead monsters will assist each other in battle. Boos have no physical defense, making them extremely weak enemies (for reference, a [[Goomba]] is the weakest enemy encountered and it has three defense points). However, Boos make up for their lack of defense with high evasion, meaning that most attacks against Boos will miss. In battle, Boos command powerful lightning magic, including the attacks [[Lightning Orb]] and [[Bolt (move)|Bolt]]. Boos also know the special attack [[Scream]], which cuts a party member's [[fear|attack and defense in half]]. When not using magic, Boos approach one of Mario's party members and make a face, damaging that character. In this game, there is also a stronger Boo variation called [[High Boo]]s, which are the same size as their normal counterparts but have blue tongues, similar to the first appearance of [[King Boo]]. The only true appearance of a Big Boo in this game is the one used in [[Bowser]]'s [[Terrorize]] attack.<ref>{{cite|title=''Super Mario RPG: Legend of the Seven Stars'' instruction booklet|date=1996|language=en|publisher=Nintendo of America|page=41}}</ref> One Boo lives in [[Monstro Town]] as part of the [[Three Musty Fears]].


====''Yoshi's Story====
===''Super Mario-kun''===
[[File:Bigboo.gif|frame|A Boo in ''Yoshi's Story''.]]
[[File:Boo SuperMarioKun 8.jpg|thumb|left|Boo as it appears in ''Super Mario-kun'']]
Boos appear in ''[[Yoshi's Story]]'' in Stage 6-3: [[Ghost Castle]]. They do not act differently, although they are slightly bigger. In this game, the normal Boo is called a Big Boo, despite not being an actual Big Boo. The Ghost Castle is also home to other Boo species: namely, the [[Boo Block]], [[Blindfold Boo]], and others. The stage, Yoshi Sewers, also has ghost platforms, along with a blue boo variant called a [[Boo Buddy]].
Boos appear in some of the ''[[Super Mario-kun]]'' comics. A Boo appears on the cover of volume 16, which is based on ''[[Super Mario 64]]''. Alongside it, [[Eyerok]], a [[Bob-omb]], and [[Bowser]] can be seen. Throughout the comic, they appear, too. Their role in the comic is similar to their role in the game, where they are enemies to Mario and attempt to attack him. [[Lady Bow]], a notable Boo, appears in a couple of the ''[[Paper Mario]]''-based issues. These issues are 25 and 27. Lady Bow appears on the cover of the twenty-fifth issue along with many of [[Mario]]'s other partners, including [[Goombario]], [[Kooper]], [[Eldstar]], and [[Twink]]. Besides appearing on the cover, she appears throughout the comic. Her role in the comic mimics her role in the game. Lady Bow reappears on the cover of the twenty-seventh issue and in the comic. Like in issue 25, Lady Bow's role in the comic is similar to her appearance in the game, where she helps Mario. In a ''[[Super Mario Galaxy]]''-based issue, [[Boo Mario]] appears on the cover along with more of Mario's transformations.
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====''Yoshi's Universal Gravitation====
===''Mario Net Quest''===
Boos appear again in ''[[Yoshi's Universal Gravitation]]'' however in this game they are very rare enemies. In fact, there are only four missions that they appear in. They follow the same tactics as normal. In this game, they are in 3-D, and use their normal laugh that is used in previous games.
In ''[[Mario Net Quest]]'', a Boo using its ''Super Mario 64'' design is one of the obstacles that can pop out of the floor tiles. It is the strongest enemy in the game, making the player lose 1500 points if they click on it.


====''Yoshi's Island DS====
===''Yoshi's Story''===
[[File:Boo Island DS.jpg|thumb|left|100px|Two Boos from ''Yoshi's Island DS''.]]
[[File:Yoshis Story Boo.png|thumb|120px|left|A Boo in ''Yoshi's Story'']]
Yoshi comes into contact with Boos, again, in ''[[Yoshi's Island DS]]''. Here, they are commonly found in castles, along with other ghastly creatures. Again, they work for Kamek. They attack the same as all Boos before, but like in ''Super Mario World 2: Yoshi's Island'', they can only be defeated if Yoshi looks away. So Yoshi must bounce an egg off of the wall into their face to defeat them. A Boo-like mid-boss, named [[Hector the Reflector]] appears as well. The Boos' laughs are used in many games before. It is used for the boss [[Six-Face Sal]], and even [[Baby Bowser]].
Boos appear in ''[[Yoshi's Story]]''. They are encountered in the stage [[Ghost Castle]]. Boos do not act differently, although they are slightly bigger. Several other Boos variants are encountered in the level, including [[Block Boo]], [[Blindfold Boo]], and [[Mini Boo|Little Boo]]s. Two variations are encountered earlier on in [[Jelly Pipe]], including [[Jelly Ghost]]s and [[Big & Little Boo]]s.
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The normal Boo<ref>{{cite|language=ja|publisher=Shogakukan|date=February 20, 1998|isbn=4-09-102619-2||title=「ヨッシーストーリー 任天堂公式ガイドブック」 (''Yoshi's Story Nintendo Kōshiki Guidebook'')|page={{file link|Yoshi Story Shogakukan P7.jpg|7}}}}</ref> is mistakenly called a Big Boo<ref>{{cite|author=Leung, Jason, Terry Munson, and Scott Pelland|title=''Yoshi's Story'' Player's Guide|publisher=Nintendo Power|page=10|date=1998|language=en-us}}</ref> in the ''[[Nintendo Power]]'' guide.
 
===''Game & Watch Gallery'' series===
====''Game & Watch Gallery 2''====
Boo Buddies are enemies in the Modern version of ''[[Vermin]]'' in ''[[Game & Watch Gallery 2]]''. They are encountered either in groups of two or just one. Boo Buddies do not move when looked at.


===''Super Mario RPG: Legend of the Seven Stars===
====''Game & Watch Gallery 4''====
{{smrpgenemy
[[File:G&WG4BooSprite.png|frame]]
|image=[[File:Bigboo_SMRPG.gif|150px]]
Boos are enemies in the Modern versions of ''[[Donkey Kong 3 (Game & Watch)|Donkey Kong 3]]'' and ''[[Mario's Cement Factory]]'', as well as the boxing glove of [[Big Boo]] in the Modern ''[[Boxing]]'', in ''[[Game & Watch Gallery 4]]''. The Boo in ''Donkey Kong 3'' slowly approaches [[Mario]] or [[Donkey Kong]] while their backs are turned, scaring the latter to earn the player points, or scaring the former to give the player a miss. Boos in the Modern ''Mario's Cement Factory'' fly into the two containers on the second floor, clogging them up.
|name=The Big Boo (Teresa)
|location=Kero Sewers
|hp=43
|attack=18
|defense=0
|mgattack=18
|mgdefense=24
|attacks=[[Scream]], [[Lightning Orb]], [[Bolt]]
|strengths=Fire, Jump
|weaknesses=None
|itemdropped=[[Pure Water]], [[Honey Syrup]]
|coinsdropped=0
|expgained=2
|psychopath=Stop staring at me!
}}
Boos return during the events of ''[[Super Mario RPG: Legend of the Seven Stars]]''. The English translation erroneously calls them "The Big Boo". In the japanese version in fact they are just called Teresa. These Boos, like other Boos that appear in previous games, hide behind their arms when stared at. However, some of The Big Boos teleport around the room, attempting to scare Mario and his friends. The Big Boos live in [[Kero Sewers]] along with many other ghouls, including [[Hobgoblin]]s and [[Shadows]]. Often, these three undead monsters will assist each other in battle. Strangely enough, Big Boos have no physical defense, making them extremely weak enemies (even a [[Goomba]] has three defense points). However, The Big Boos make up for their lack of defense with high evasion, meaning that most attacks against a The Big Boo will miss. In battle, The Big Boos command powerful lighting magic, including the attacks [[Lightning Orb]] and [[Bolt]]. The Big Boos also know the special attack [[Scream]], which cuts a party member's attack and defense in half. When not using magic, a The Big Boo will approach one of Mario's party members and make a face, damaging that character. In this game there is also a stronger Boo variation called [[Li'l Boo]]s, which are the same size as normal Boos but have blue tongues, similar to the first appearance of [[King Boo]]. The only true appearance of a Big Boo in this game is the one used in [[Bowser]]'s [[Terrorize]] attack <ref>As named in the ''Super Mario RPG: Legend of the Seven Stars'' manual.</ref>.
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===''Mario Party'' series===
===''Mario Party'' series===
====''Mario Party====
Boo has been a major character in the ''Mario Party'' series, from being a thief for hire to being a playable character.
[[File:CrazyCutter.png|thumb|left|[[Mario]], [[Luigi]], [[Peach]], and [[Donkey Kong]] cutting out a Boo.]]
====''Mario Party''====
Boos make minor appearances in ''[[Mario Party]]''. Their voices can be mimicked by one of the items: the [[Talking Parrot]]. Boos also appear in each of the game's board maps, excluding [[Peach's Birthday Cake]]. On the boards, they steal coins or stars from opponents, and they are willing to steal a few coins for free from any player, although they ask for coins to steal a star. If the player tells Boo that they don't want to steal anything then Boo will say ''Don't feel so guilty. Ha ha ha!'' Additionally, after the Luigi's Engine Room board is completed, a Boo, [[Koopa]], and a [[Toad]], along with the two runner-ups, surround the victor and congratulate them. Boos also appear as one of the shapes the player can cut in the minigame, [[Crazy Cutter]].
[[File:CrazyCutter.png|thumb|left|Players cutting out Boos in Crazy Cutter from ''Mario Party'']]
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Boos are non-playable characters in ''[[Mario Party]]''. They are encountered in the minigames [[Pedal Power]] and [[Running of the Bulb]], and are a shape featured in [[Crazy Cutters|Crazy Cutter]]. Boos are on every board map except [[Peach's Birthday Cake]], and they provide the player character with the option stealing either a number of coins from an opponent for free or a [[Star (Mario Party series)|Star]] for 50 coins, on their behalf. A Boo is one of the characters to congratulate the victor at the end of [[Luigi's Engine Room]]. A Boo voice can be mimicked by a [[Talking Parrot]].
 
====''Mario Party 2''====
Boos return in ''[[Mario Party 2]]''. On boards, they function similarly as before. Their role is also integrated into the [[Boo Bell]] item, which summons a Boo. Boo now charges five coins for stealing coins, of which it can take up to thirty of. If the Boo tries to steal Coins, the opponent can fight it off by pressing the A button quickly. Additionally, the Boo can only steal a maximum of 30 coins or a maximum of one Star. A Boo appears in the minigame [[Skateboard Scamper]], going after the player characters, and in [[Day at the Races]] as one of the competitors.
 
====''Mario Party 3''====
[[File:CurtainCallMP3.png|thumb|Boos in [[Curtain Call]] from ''Mario Party 3'']]
Boos are non-playable characters in ''[[Mario Party 3]]''. One is partnered with [[Yoshi]] by default in [[Mario Party 3#Duel Mode Partners|Duel Mode Partners]]; it counterattacks an opponent (except [[Thwomp]]s) to deliver equal damage, and does this to [[Chain Chomp]] only if it is directly in front. Boos are features on every board, behaving identically as in the previous two games. They are part of the returning Boo Bell item once more. Boos appear in the minigames [[Curtain Call]], [[Stacked Deck]], [[Three Door Monty]], and [[Crowd Cover]]; two portraits of a Boo appear in [[Locked Out]]. Boos have a unique role in [[Waluigi's Island]], where they present two paths to the player character upon being encountered: one of them is rigged and leads to the start, while the other allows the player character to continue along.
 
====''Mario Party 4''====
[[File: Booparty4.jpg|thumb|x200px|left|The sorcerer Boo from ''Mario Party 4'']]
Boos are represented as characters and species in ''[[Mario Party 4]]''. In both cases, this is the first game to give them a design that they retained in most appearances since. One of the Boos is the host of [[Boo's Haunted Bash]], as well as the fourth host of the Reversal of Fortune. A different Boo is playable in [[Beach Volley Folly]]. Boos appear in [[Long Claw of the Law]], possibly as characters to obtain. The host of Boo's Haunted Bash wears a wizard's hat and cape. Other Boos appear in Boo's Haunted Bash: one owns the Item Shop; another owns the [[Mystery Train]], giving rides to the Boneyard if a [[Red Boo]] is not in its presence; one has the player character press one of the keys of the Horn of Plenty to get one of three randomly chosen items; and one has to press the correct key at the right time until the end of the side game to get a certain amount of Coins. Boos appear on every board, stealing coins and Stars for the player at the [[Ghost House#Mario Party series|Boo House]] similarly to previous entries of the ''Mario Party'' series.


====''Mario Party 2====
====''Mario Party 5''====
[[File:DayAtTheRacesMP2.png|thumb|left|Boo as it appears in ''Mario Party 2''.]]
Boo is a playable character in ''[[Mario Party 5]]''. It is partnered with [[Koopa Kid]] by default. Boo's previous role on the boards is fulfilled by [[Chain Chomp]].
Boos make several appearances in ''[[Mario Party 2]]''. In it, they steal coins or stars as they did in the first game. Additionally, an item called the [[Boo Bell]] appears. When a player obtains it, they can ring for a Boo to come. The Boo that comes to the player's side is asked to steal coins or stars, depending on how much the player can afford. If the Boo is sent to steal coins from an opponent, the opponent can fight it off by pressing the A button quickly. Additionally, the Boo can only steal a maximum of 30 coins or a maximum of one star.


A Boo also appears in the battle minigame, [[Day at the Races]], along with the others racers, [[Whomp]], [[Thwomp]], and [[Bob-omb]]. The Boo can disappear and then reappear in a further spot on the racetrack. However, it gets its face stuck in the ground sometimes, causing it to stop for a short period of time.
====''Mario Party 6''====
Boo is a playable character in ''[[Mario Party 6]]''. Because of this, [[Red Boo]]s take the role of the Boo species, even taking their role in [[Towering Treetop]] and [[Castaway Bay]] at nighttime by allowing player characters to steal coins and stars from opponents.


====''Mario Party 3====
====''Mario Party Advance''====
[[File:BooIcon MP3.png|right|thumb|Boo from ''Mario Party 3''.]]
{{quote|Ee hee hee! It's ghastly news!|Boo|Mario Party Advance}}
Boos also appear in ''[[Mario Party 3]]''. Like in their previous appearances, they are not major characters in the game. They are among the Duel Partners in the [[Mario Party 3#Duel Mode Partners|Duel Mode Partners]]. Its partner is [[Yoshi]] and it is able to counterattack the attacker's move for equal damage. Boos appear in the unlockable party board, [[Waluigi's Island]]. Whenever a player runs into a Boo, it will show them to two paths. One of the paths are rigged. If the player chooses the rigged path, they will be summoned back to the start. If they choose the correct path, they will continue on the board. Boos appear on all of the other boards, [[Chilly Waters]], [[Deep Bloober Sea]], [[Spiny Desert]], [[Woody Woods]], and [[Creepy Cavern]]. On the board map, a picture of them can be seen next to a grave. Boos try to steal the player's [[Coin|coins]] or [[Star|stars]]. They also return with the Boo Bell. Boos is also in the minigames [[Curtain Call]], [[Stacked Deck]], [[Three Door Monty]], and [[Crowd Cover]]. There are also pictures of Boos in [[Locked Out]].
[[File:MPA Mr E Horror Condo.png|thumb|Boos in the [[Horror Condo]] in ''Mario Party Advance'']]
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Boos are non-playable characters in ''[[Mario Party Advance]]''. Four of them haunt [[Boo Cemetery]]. They mention a crime when [[Shroomlock]] appears to assist them, shortly after the player's arrival. At the mention of a theft, the Boos worriedly ask for help to find the [[golden Boo statue]], which they consider a symbol of their friendship. The Boos find that there are four of them instead of the usual three.<ref>{{cite|author=Boo|date=2005|quote=That's right! We three Boos are best--|title=''Mario Party Advance''|publisher=Nintendo|language=en}}</ref><ref>{{cite|author=Boo|date=2005|quote=When did we pick up a fourth?|publisher=Nintendo|title=''Mario Party Advance''|language=en}}</ref> When the Boo with a slightly moveset and rhythm is selected by the player, the false Boo is revealed to be [[Koopa Kid]], who escapes, leaving behind the statue, and the Boos give the player the [[Predictotron]] as a reward. The Boos are said to haunt [[Horror Condo]] regularly in the epilogue.


====''Mario Party 4====
Boos appear in the minigames [[Boo-Bye]], alongside Red Boos and Blue Boos; [[Spooky Spike]], serving volleyballs to the player character; and [[Floor It!]], as possible passengers to take to the appropriate floor. The [[Porta-Gust]] [[Gaddget]] involves sucking Boos into a vacuum.
[[File: Booparty4.jpg|thumb|175px|left|The Sorcerer Boo from ''Mario Party 4''.]]
In ''[[Mario Party 4]]'', a Boo plays a major role as the host for [[Boo's Haunted Bash]]. This Boo has a whole new look with a wizard's cape. Like the other hosts in the game, it is the character to reward to player with a star. Multiple Boos also appear on this board as background characters. One controls the Item Shop. Another one owns the [[Mystery Train]], but it only gives out rides to the Boneyard if a [[Red Boo]] is not in its presence. Two other Boos own the Boo House, allowing players to steal stars and coins from their opponents. [[Boo's Crystal Ball]] has the same effect as the Boo house. Two sidegames involving Boos requires a [[Mini Mushroom]]. One of them has the player pressing one of the keys of the Horn of Penalty to get one of three randomly chosen items. The second one has the character on a piano. They have to press the correct key at the right time until the end of the sidegame to get a certain amount of coins. A question mark space activates a Boo clock. If three people land on them, Big Boo will appear. Big Boo is basically an upgraded version of the Boo House; he targets all players instead of one. Boo is also the fourth host of the Reversal of Fortune, who oversees what is given. Also, a Boo is an unlockable, playable character in the stage, [[Beach Volley Folley]]. They also appear on all of the other boards, [[Toad's Midway Madness]], [[Koopa's Seaside Soiree]], [[Goomba's Greedy Gala]], [[Shy Guy's Jungle Jam]], and [[Bowser's Gnarly Party]]. On theses boards, the player can go to them to steal coins or stars from the other players.  
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====''Mario Party 5====
====''Mario Party 7''====
[[File:MP5Boo.PNG|thumb|right|125px|Boo from ''Mario Party 5''.]]
Boo is a playable character in ''[[Mario Party 7]]''. He is partnered with [[Dry Bones]]. Red Boos have similar roles as in ''Mario Party 6'' since Boo is playable. Boo's special orb, shared with Dry Bones, is the [[Magic Orb]], which doubles their dice roll and grants temporary invisibility and invulnerability to traps for the next two turns.
''[[Mario Party 5]]'' marks the first game in the ''Mario Party'' series where a Boo is a playable character in Party Mode. It is one of the unlockable characters, the others being [[Koopa Kid]] and [[Toad]]. Boo's partner in the game is [[Koopa Kid]]. Since Boo is playable, it does not make any major background appearances.


====''Mario Party 6====
====''Mario Party 8''====
[[File:MP6 Boo.jpg|thumb|left|Boo, along with some Red Boos, from ''Mario Party 6''.]]
Boo is a playable character in ''[[Mario Party 8]]''. He has Dry Bones as a partner again. Red Boos take the role of the Boo species once more. [[King Boo]] hosts one of the boards, [[King Boo's Haunted Hideaway]].
A Boo reappears as playable character in ''[[Mario Party 6]]''. In this game, it is a default character. In the game, there is also an orb called [[Boo Away Orb]], which protects the player from a [[Red Boo]]. Red Boos also appear in the minigame [[Boo'd Off the Stage]]. Red Boos also appear two boards, [[Towering Treetop]] and [[Castaway Bay]]. This game also marks the third appearance of Red Boos in the ''Mario Party'' series.


====''Mario Party Advance====
====''Mario Party DS''====
[[File:MPAhorrorcondo2.png|thumb|Boos and a [[Snifit]] in the Horror Condo in ''Mario Party Advance''.]]
Boos are non-playable characters featured in the minigames [[Boo Tag]] and [[Peek-a-Boo (minigame)|Peek-a-Boo]] in ''[[Mario Party DS]]''. A Boo tags a player character in Boo Tag, and player characters try to pass it over to opponents, since the character tagged for the least amount of time is the winner. A variety of Boos appear in Peek-a-Boo, wearing different hats and appearing in a variety of colors like red, blue, green, and yellow. Teams compete to find more wanted Boos more than the opposing side.
Boos appear in ''[[Mario Party Advance]]'' as supporting characters. They appear in a few minigames, including [[Boo-Bye]]. In this minigame, regular Boos appear alongside Red Boos and Blue Boos.


They also appear in the [[Boo Cemetery]] where they are main characters in the quest, '''True-Blue Boo'''. This is a mystery quest, in which their golden Boo statue has been stolen, and they suspect that one of them has stolen it. They then notice that there are four of them, and it is up to the player to discover which one is a fake. Once he is discovered, the fake Boo reveals himself as [[Koopa Kid]], and flees the area, leaving the statue behind. The Boos then reward the player with the Gaddget [[Predictotron]].
====''Mario Party 9''====
Boos are featured in the board [[Boo's Horror Castle]] and in the boss minigame [[King Boo's Puzzle Attack]] in ''[[Mario Party 9]]''. There are Boo portraits in Boo's Horror Castle from which a Boo emerges when passed, following behind the player characters by three spaces after each turn. If a Boo is on the same space as the captain, they lose half of their [[Mini Star]]s. Boos are sent out by King Boo in King Boo's Puzzle Attack when he has lost at least half of his health. Only one Boo is present at a time, and it stuns the cursor of a player character on contact.


They also appear in the [[Horror Condo]] in the quest '''Condo of Mystery!'''. A [[Snifit]] states that the condo isn't haunted, and the player has to head to the Boos and ask them to haunt it. After arriving at the cemetery, the Boos state that they actually forgot to haunt the condo, and head there to do so.
====''Mario Party: Island Tour''====
[[File:Boo Artwork (alt) - Mario Party Island Tour.png|thumb|Boo from ''Mario Party: Island Tour'']]
Boo is a playable character in ''[[Mario Party: Island Tour]]''. It holds up a [[Mushroom]] in its artwork.


The end credits state that they haunt the condo daily.
====''Mario Party 10''====
[[File:King Boo's Tricky Tiles MP10.png|thumb|left|Boss minigame [[King Boo's Tricky Tiles]] from ''Mario Party 10'']]
Boos are non-playable characters in ''[[Mario Party 10]]''. A Boo appears in the board [[Haunted Trail]], where by landing on [[Boo (area)|a certain area]], Boo comes to steal five Mini Stars from a player character with every turn until it either passed to a different opponent from a [[Boo Space]] or driven towards a [[Streetlight]]. Boos appear in the minigames [[Boo Burglars]], as enemies to examine, and [[Balloon Blast Bash]], in the form of a balloon. Several Boos are in the background of [[Luigi Board]].
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====''Mario Party 7====
====''Mario Party: Star Rush''====
[[File:DB and Boo.JPG|thumb|150px|Boo and Dry Bones from ''Mario Party 7''.]]
[[File:Boo'sBlockParty amiibo.jpg|thumb|Boo's Block Party from ''Mario Party: Star Rush'']]
''[[Mario Party 7]]'' marks the third ''Mario Party'' game where Boo is playable. It also marks [[Dry Bones]]'s first playable appearance, who is Boo's partner throughout the game. Red Boos appear in the game, too. Red Boos appear in a few minigames such as [[Ghost in the Hall]]. In this minigame, Red Boos try to scare the players. Oddly, the Red Boos also try to scare Boo, if Boo is one of the characters.
Boos are non-playable characters in mode Boo's Block Party and in the minigames [[Haunted Hallways]] and [[House of Boos]] in ''[[Mario Party: Star Rush]]''. When a Boo [[amiibo]] is used in Boo's Block Party, four Boos are displayed in the background, two on each screen. Boo can be used in the Mario Shuffle mode if its amiibo is scanned.
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====''Mario Party: The Top 100''====
Boos are non-playable characters in the returning minigames [[Slot Trot]] and [[Jigsaw Jumble]] and part of the [[Boo Bell]] item in Minigame Match in ''[[Mario Party: The Top 100]]''.
 
====''Super Mario Party''====
Boo is a playable character in ''[[Super Mario Party]]''. Its Boo Dice Block consists of two of each -2 coins, 5, and 7.


====''Mario Party 8====
====''Mario Party Superstars''====
[[File:BooMP8Official.png|thumb|left|Boo from ''Mario Party 8''.]]
Boos are non-playable characters in every board and in the minigames [[Roll Call (minigame)|Roll Call]] and [[Crazy Cutters]] in ''[[Mario Party Superstars]]''. In boards, Boos steal either coins or stars from an opponent, like in the first three entries of the ''Mario Party'' series.
''[[Mario Party 8]]'', marks the latest game where Boo is a playable character in the ''Mario Party'' series. Boo's partner is Dry Bones, again. Red Boos appear in some minigames such as [[Boo-ting Gallery]]. ''Mario Party 8'' also marks the first appearance of [[King Boo]], who is the board host of [[King Boo's Haunted Hideaway]]. In order to get a star, the player must find the room King Boo is hiding in and give him ten coins. There are three rooms, two of which contain a trap hole. If the player finds one of these rooms, several Red Boos will throw him/her in, forcing the player to start back at the beginning. When the player gets a star, King Boo will rearrange the mansion's rooms. Red Boos appear as owners of the item shops.
 
====''Super Mario Party Jamboree ''====
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In ''[[Super Mario Party Jamboree]]'', Boo returns as a playable character and a board element, retaining the latter's function from ''Mario Party Superstars''. This is the first game that Boo appears in a playable and non-playable capacity, unlike other games that used other characters for stealing functionalities. If the playable Boo meets the non-playable Boo, the latter will say "Wah! It's like looking into a mirror..."<ref>{{cite|author=God is a Geek|date=September 9, 2024|url=youtu.be/f623bkogUO0?t=466|title=''Super Mario Party Jamboree'' is the biggest entry in the series yet {{!}} Hands-on preview|publisher=YouTube|language=en|timestamp=07:46|accessdate=September 9, 2024}}</ref>
 
===''Mario Golf'' series===
{{MGTT character infobox
|title=Boo
|image=[[File:ToadstoolTour Boo Mug.png]]
|drive=208 yards
|star_drive=253 yards
|trajectory=Slice
|height=3/5
|impact=13/21
|star_impact=09/21
|control=10/21
|spin=08/21
}}
====''Mario Golf''====
Boos are supporting characters in the [[Mario Golf (Nintendo 64)|Nintendo 64 version]] of ''Mario Golf''. They indicate the wind direction in relation to the camera angle. "Boo" is one of the names that can appear on the scoreboard. A Boo is the basis of the design of hole 2 of [[Mario's Star (golf course)|Mario's Star]]. Boos are depicted in artwork associated with [[Boo Valley]].


====''Mario Party DS====
====''Mario Golf: Toadstool Tour''====
[[File:MPDS Peek-a-Boo.jpg|thumb|Boos from the minigame, Peek-a-Boo, in ''Mario Party DS''.]]
Boo is an unlockable playable character in ''[[Mario Golf: Toadstool Tour]]''. Besides this, a Boo indicates the wind direction like before. Boos are obstacles in [[Bowser Badlands]], affecting the trajectory of balls hit through them. Two Boos carry a sign and float across the screen slowly if the player delays with their swing; the signs usually describe gameplay tips, but some are taunts.
Boo is not a playable character in ''[[Mario Party DS]]'' and plays no part in board play, but appears as an unlockable figure. They also appear in the mini-games [[Boo Tag]], and [[Peek-a-Boo]]. In Boo Tag, a Boo tags a player. The tagged player must try to get rid of the Boo by running into another player. The player that spent the least time with the Boo wins. In Peek-a-Boo, the players must find the wanted Boo. A lot of different Boos appear in outfits, such as hats. Several of the wanted Boo appear, and once they are all gone, the game is over. The team that one the most Boos wins.


====''Mario Party 9====
====''Mario Golf: World Tour''====
[[File:Mp9 e.jpg|thumb|left|A Boo in ''Mario Party 9''.]]
[[File:BooHoleInOne.jpg|thumb|left|Boo getting a [[Hole-in-One]] in ''Mario Golf: World Tour'']]
In ''[[Mario Party 9]]'', [[King Boo]] is the boss of [[Boo's Horror Castle]]. Normal Boos also appear on the board. When the player passes a Boo portrait, a Boo will emerge and chase after the player. These Boos will move three spaces after each turn, and if a Boo catches up to the players (or vice versa), the current captain will lose half of all of his or her [[Mini Star]]s.
Boo is a playable character in ''[[Mario Golf: World Tour]]''. The wind direction and speed is represented by a blowing cloud instead of a Boo. Boos and King Boo are seen floating in the sky in Hole 4 of [[Bowser's Castle (golf course)|Bowser's Castle]].  


During [[King Boo's Puzzle Attack]], whenever King Boo's health is depleted halfway, he sends Boos to attack the player. If the player's cursor touches a Boo, he or she is temporarily stunned. King Boo only sends one Boo at a time.
====''Mario Golf: Super Rush''====
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Boo is a playable character in ''[[Mario Golf: Super Rush]]''. Boo is billed a Spin character, having a higher spin stat than the other characters. Its [[Special Shot (Mario Golf: Super Rush)|Special Shot]] is Mischief Twister, which involves several Boos embedding themselves into Boo's golf ball before it swings and later haunting any other balls nearby to force a curved trajectory in their shot gauge. Boo's [[Special Dash]] is the Carousel Dash, in which it is circled and carried forward by Boo Buddies. Boo is not penalized for crossing bodies of water or lava, since it can float, but it does deplete the stamina gauge. Boo appears in Golf Adventure mode as part of the rookie class with the player’s Mii, Toadette, and Chargin’ Chuck. Boo has an variation with a visor available that is unlocked for playing in Ranked Match.


===''Mario Tennis'' series===
===''Mario Tennis'' series===
====''Mario Tennis'' (Nintendo 64)====
====''Mario Tennis''====
[[File:Mt64boo.png|thumb|150px|right|Boo from ''Mario Tennis''.]]
[[File:Mt64boo.png|thumb|Artwork from ''Mario Tennis'', the first playable role of Boo]]
A Boo appears in ''[[Mario Tennis (Nintendo 64)|Mario Tennis]]'' for the [[Nintendo 64]]. It is classified as a tricky character. The only other tricky character is [[Paratroopa]]. It is also a default character. Most of the playable characters have courts named after them. However, Boo does not have its own court.
Boo is a playable character in the [[Nintendo 64]] version of ''[[Mario Tennis (Nintendo 64)|Mario Tennis]]''. He is billed a tricky character, like with [[Koopa Paratroopa|Paratroopa]]. The [[Mario Tennis (Game Boy Color)|handheld version]] includes a Boo in the [[Boo Blast (minigame)|Boo Blast]] minigame instead, where the goal is to hit Boos, and Boos appear in the audience at [[Peach's Castle]].
 
====''Mario Power Tennis''====
Boo is also playable in ''[[Mario Power Tennis]]'', which also provides it a different voice. When he wins a championship, Mario and Luigi would come out with the trophy and Boo would be missing. They look around and the trophy would start to float. Boo then appears under it to Luigi's relief as Mario laughs in amusement. The Mario Bros. themselves are then surrounded and levitated by multiple other Boos as the main Boo flies up to the screen and holds the trophy. Boo's taunt is to wave his racket while laughing. Boo's offensive power shot is the [[Boo Blast (move)|Boo Blast]] and defensive power shot is the [[Boo Brigade Return]].
 
====''Mario Tennis Open'' / ''Mario Tennis: Ultra Smash''====
Boo is a playable character in ''[[Mario Tennis Open]]'' and ''[[Mario Tennis: Ultra Smash]]'', both billing it a Tricky character.
 
====''Mario Tennis Aces''====
[[File:MTA Models Boo.png|thumb|Boo from ''Mario Tennis Aces'']]
Boo is a playable character in ''[[Mario Tennis Aces]]''. It is billed a Tricky character. There is a co-op challenge titled "Boo Hunt," which can be played to unlock alternate blue, green, and purple visor costumes for Boo, costing 2,500, 10,000, and 20,000 coins, respectively. The challenge involves hitting Boos for coins.
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====''Mario Tennis'' (Game Boy Color)====
===''Paper Mario'' series===
[[File:Mario Tennis GBC.PNG|thumb|left|Boo and Daisy's cameo appearance.]]
Boos appear in every game in the ''[[Paper Mario (series)|Paper Mario]]'' series, where they are usually found in ghost houses. In the first three ''Paper Mario'' games, the Boos appear with a design similar to [[Bigger Boo]] from ''[[Super Mario World 2: Yoshi's Island]]''. In the latter three games, they use their modern appearance from ''Mario Party 4'' and onward.
A Boo makes a cameo appearance in ''[[Mario Tennis (Game Boy Color)|Mario Tennis]]'' for the [[Game Boy Color]]. [[Princess Daisy]] and [[Toad]] also make cameo appearances. They can be seen in the audience at [[Peach's Castle]].
====''Paper Mario''====
{{quote|I want to hear people shriek and watch them run away yelling! That's what makes Boos happy.|Boo|Paper Mario}}
[[File:PM Boos Throwing the Record.png|thumb|Boos in [[Boo's Mansion]] from ''Paper Mario'']]
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|footer=Two kinds of Boos from ''[[Paper Mario]]''
}}
Boos appear in ''[[Paper Mario]]'' as friendly but tricky characters. White Boos live in [[Boo's Mansion]], and tan Boos live at [[Gusty Gulch]]. Their leader is [[Lady Bow]], who lives in Boo's Mansion along with [[Bootler]].
 
At first, Boos were being eaten by [[Tubba Blubba]]. Some Boos tried attacking the monster to save their friends, but they failed because of Tubba Blubba's "Invincibility". Seeking help from [[Mario]], they captured [[Skolar]], the Star Spirit Mario was trying to save, in order to have Mario help them.
 
In the game, when [[Mario]] arrives at [[Boo's Mansion]], [[Bootler]] tells him to get to the third floor. The Boos have prepared some puzzles for him under the order of [[Lady Bow]] to test him. One puzzle is for Boos to form a rotary circle, throw an item several times and ask Mario to guess who is holding the item. The first time he opens a door a big Boo appears on the screen. In the eastern room of the second floor Boos holding a [[Record (Paper Mario)|Record]] play this trick. In the western room of the second floor, a Boo is guarding a chest box with a [[Weight]] in it. Mario plays the Record to lure the Boo away and uses the Weight on the droplight of the mansion to open the western door on the first floor. Boos in the basement hide in a big chest box in the basement. When Mario opens the chest box, they play the puzzle with [[Super Boots]]. After Mario gets them, he is able to get [[Boo's Portrait]] with which he is able to get to the third floor. There, Lady Bow asks Mario to help the Boos to defeat Tubba Blubba as a condition to free Skolar, and joins Mario's party to assist him.
 
A Boo by the name of [[Igor]] also has a shop in the basement, but he will not sell until after Lady Bow joins the party.
 
In addition, a Boo appears after Mario gets the [[Super Boots]], and tells him how to get the [[Star Piece (Paper Mario series)|Star Pieces]] underground. Additionally, some Boos are flying in the sky who can be seen out of the windows. When Mario is about to set off, two white Boos appear to open the gate to Gusty Gulch under the command of Bow.
 
In [[Gusty Gulch]], upon [[Tubba Blubba]]'s arrival, the Boos hide except for [[Stanley (Paper Mario)|Stanley]], who is too late and gets caught and eaten by Tubba Blubba.
 
In the basement of [[Tubba Blubba's Castle]], a brown Boo tells [[Mario]] not to fight [[Tubba Blubba]] until he finds his weak point. According to his word, he sneaked into the castle to look for the weak point. After [[Mario]] gets [[Yakkey]], some tan Boos appear in front of [[Tubba Blubba's Castle]] and, seeing Mario and [[Lady Bow|Bow]] get out and [[Tubba Blubba]] chasing, help the team by blocking the door.
 
After [[Tubba Blubba]] is defeated, the Boos he has eaten are saved, and Bootler releases Skolar as promised. Boos rejoice, and the background music in Boo's Mansion is replaced with a cheerful one. The Boos at [[Gusty Gulch]] write Lady Bow [[List of letters in Paper Mario#Boos in Gusty Gulch|an admiration letter]], which the player can read at the [[Toad Town Post Office]]. They also begin to talk about a female Boo called [[List of implied characters#Victoria|Victoria]].
 
After Mario defeats [[Bowser]], two Boos come to [[Peach's Castle]] to see the party, one white and one brown. The white one says he comes to see [[Lady Bow]] in her finery. He thinks that Bow is prettier than [[Princess Peach]]. The brown one says that he is going to have a wedding ceremony after the party. In the end-of-game [[parade]], three white Boos along with [[Bootler]] are carrying [[Tubba Blubba]]'s body.
 
====''Paper Mario: The Thousand-Year Door''====
[[File:PMTTYD Boo Sprite.png|frame|left]]
Boos return in ''[[Paper Mario: The Thousand-Year Door]]'' and its [[Paper Mario: The Thousand-Year Door (Nintendo Switch)|Nintendo Switch remake]] as friendly characters as well as enemies for the first time in the series. Some Boos such as [[Lahla]] and [[Peeka]] in [[Rogueport]] can be seen running shops and various casino games.
Enemy Boos are found in [[Creepy Steeple]] and levels 21-29 of the [[Pit of 100 Trials (Paper Mario: The Thousand-Year Door)|Pit of 100 Trials]]. When Mario first enters the steeple there is only one Boo in the room who says that he misses his friends. He will let Mario through only one door (blocking him from using any other doors), where he finds a chest. When he opens it, 200 Boos fly out. The last Boo asks Mario "How many Boos came out of that chest?" If Mario answers correctly the Boo will give him an [[Ultra Mushroom|Ultra Shroom]]. If Mario is wrong the Boo will give him one [[coin]]. Upon returning to the main room, the first Boo is still there. He asks if Mario is going to be mean to him. If Mario answers "No", a bunch of Boos (the same ones from the treasure chest) will start flying around the main room, attempting to swarm Mario. If successful, they will throw Mario out of the Steeple, exactly like the [[Sentinel]]s in [[Tubba Blubba's Castle]]. If Mario Spin Attacks them several times, they merge into an [[Big Boo|Atomic Boo]]. Once the Atomic Boo is defeated (releasing a [[Lucky Start]] [[List of badges in Paper Mario: The Thousand-Year Door|badge]]), Mario can fight Boos in other parts of the Steeple. Even before defeating the Atomic Boo, Boos can still be found, but only when accompanying [[Swoop]]ers.
 
The original Creepy Steeple Boo sends an [[Mailbox SP#Boo: Mail?|e-mail]] to Mario that thanks him for freeing his friends, despite the fact that they attacked him. He signs the letter "[[The Creepy Steeple Boo]]". More Boos can be found in the Pit of 100 Trials. In this game, Boos attack by becoming invisible and getting close to Mario or the partner, then becoming visible and making a glare at them, causing 3 damage. However, if Mario or his allies gets lucky in battle, the Boo who tried to attack Mario and his partner will be tired out. The game also introduces a more powerful sub-species, the [[Dark Boo]], which can be found in [[Poshley Sanctum]].
 
Boos can also appear as members of the [[audience]], where they can throw items onto the stage and randomly turn a character in the battle invisible for one turn.
 
In the remake, the Boos use their modern voice clips. Additionally, the Creepy Steeple Boo can be later found in the hidden room containing the [[Cookbook]]. When spoken to, he will quiz Mario again with three questions about various parts of the game, and will reward Mario with an item if the latter answers all three questions correctly. This can be done multiple times, each with its own trio of questions.
======Field Tattle======
Outside of battle, [[Goombella]] can use [[Tattle]] only on a Boo found in the foyer of [[Creepy Steeple]] after Mario releases the 200 Boos.
*"''That's a Boo. You think it's one of the Boos from that box?''"
 
====''Super Paper Mario''====
[[File:Mansion patrol.png|thumb|Boos in the minigame [[Mansion Patrol]] in the Flipside Arcade from ''Super Paper Mario'']]
Boos return as enemies in ''[[Super Paper Mario]]''. In this game, they turn invisible if Mario looks at them, but they turn visible and chase him if he is not looking at them, similar to their behavior in ''Super Mario 64''. To defeat them, the player must approach them from the back and then attack them. Additionally, the [[Flipside Arcade]] houses a Boo themed shooting game, Mansion Patrol. This game has the player shooting Boos, including Dark Boos and occasionally Atomic Boos, to score points. A [[Toad]] frequently appears to give power-ups, as long as the player saves him from his Boo captor. Lady Bow also makes three cameos in this game.
 
====''Paper Mario: Sticker Star''====
[[File:Boo PMSS.png|frame|left]]
Boos reappear in ''[[Paper Mario: Sticker Star]]''. They only appear in World 4-3: [[The Enigmansion]]. Mario must use the [[Book of Sealing]], given by a [[Toad (species)|Toad]], to seal away every Boo that has escaped. In battle, Boos can make themselves disappear and can slap Mario or they can go up to Mario and scare him by making a scary face. They are able to make Mario [[dizzy]] in this game with their scare attack preventing him from using any of his defensive/dodging stickers. The attack is determined by the sound the Boo makes when it disappears.
 
Among the normal Boos, there is one golden Boo that drops several Coins after Mario defeats it, which can be found in the safe. This Boo attacks exactly like the normal ones. Another notable Boo is one that is crumpled, which is found in a trash can. In battle, it only has 1 HP and cannot attack. Additionally, a group of eighty-two Boos called a [[Boo Stack]] also appears. Once all the Boos get returned to the book and it is placed in its rightful spot, [[Kamek]] appears and turns all the captured Boos into the mini boss, [[Big Boo#Paper Mario series|Big Boo]]. After defeating the mini-boss, the Boos are put to rest once again and the mansion is restored to its former state. Boos can no longer be fought at this point.
 
====''Paper Mario: Color Splash''====
[[File:PMCS Boo 10-Stack Idle Animated.gif|thumb|left|A [[Boo 10-Stack]] from ''Paper Mario: Color Splash'']]
Boos return in ''[[Paper Mario: Color Splash]]'' as enemies who can be fought within the [[parallel world]] at [[Vortex Island]], [[Lighthouse Island]] and [[Fortune Island]]. By the time they are first encountered, Mario can instantly defeat them with a hammer [[First Strike]] without entering a battle. In battle, they attack by either hitting Mario or scaring him. They can disappear while in battle, causing all attacks to miss until they reappear. Outside of battle, if one is stared at too long, it will disappear, and then reappear behind Mario. A Boo appears as an NPC in [[Redpepper Crater]], where it is in a hot spring. A [[Boo 10-Stack]] variant also appears.
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====''Mario Power Tennis====
====''Paper Mario: The Origami King''====
[[File:MPTBoo.PNG|thumb|200px|left|Boo from ''Mario Power Tennis''.]]
[[File:OrigamiBoo.jpg|thumb|An origami Boo as seen in ''Paper Mario: The Origami King'']]
Boo also appears in ''[[Mario Power Tennis]]'' where it is a playable character. When it wins a championship, Mario and Luigi would come out with the trophy and Boo would be missing. They look around and then the trophy would start to float. Boo then appear unders it and Mario and Luigi are relieved. Then they start floating and the air is  full of Boos who start flying around. Then the main Boo flies up to the screen and holds the trophy. Boo's taunt is to wave its racket while laughing. Boo's offensive power shot is the [[Boo Blast]] and its defensive power shot is the [[Boo Brigade Return]].
[[File:Paper Macho Boo.jpg|thumb|left|A Paper Macho Boo]]
[[Folded Soldiers|Origami]] Boos appear as enemies in ''[[Paper Mario: The Origami King]]'', first encountered in the [[Scorching Sandpaper Desert]], but only at night; after Mario has explored the [[Temple of Shrooms]] and put the sun back in the sky, they are replaced by [[Koopa Paratroopa]]s. In battle, Boos will turn invisible right before Mario manipulates the arena, forcing him to memorize their positions. However, they will reveal themselves if they are hit by a Toad's thrown object or shortly before time runs out. In addition, much larger [[Paper Macho Boo]]s appear in the desert at night, replaced by [[Paper Macho Koopa Paratroopa]]s by day. A Paper Macho Boo is also featured as one of the seven opponents on [[Scuffle Island]].
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===''Mario Golf'' series===
===''Luigi's Mansion'' series===
[[File:Boomgtt.png|thumb|120px|Boo from ''Mario Golf: Toadstool Tour.'']]
====''Luigi's Mansion''====
A Boo makes a couple of appearances in the ''[[Mario Golf (series)|Mario Golf]]'' series. It first appears in ''[[Mario Golf (Nintendo 64)|Mario Golf]]'' for the [[Nintendo 64]]. Boo is one Mario's Power Star Holes for Hole 2. Also, Boos appear in one of the courses, [[Boo Valley]]. Boo is one of the unlockable characters in ''[[Mario Golf: Toadstool Tour]]'', the others being [[Bowser Jr.]], [[Shadow Mario]], and [[Petey Piranha]]. Boos also appear in one of the courses, [[Bowser Badlands]].
{{main|List of Boos in Luigi's Mansion}}
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[[File:LMBoo.jpg|thumb|left|A Boo in ''Luigi's Mansion'']]
Boos are enemies in ''[[Luigi's Mansion]]'' and [[Luigi's Mansion (Nintendo 3DS)|its remake]]. This is the first appearance of [[King Boo]], the main antagonist as well as leader of the [[List of Boos in Luigi's Mansion|50 Boos]]; of the Boos, 15 of them are [[Mini Boo|smaller one]]s that make up the portrait ghost [[Boolossus]]. Boos appear in rooms even while the lights are on, unlike with other ghosts. When a Boo is attacked, it usually flees, but some twirl into Luigi to cause damage.
 
====''Luigi's Mansion: Dark Moon''====
{{main|List of Boos in Luigi's Mansion: Dark Moon}}
Boos are enemies in ''[[Luigi's Mansion: Dark Moon]]''. There are a total of [[List of Boos in Luigi's Mansion: Dark Moon|32 Boos]], all serving [[King Boo]], who returns as the main antagonist; ten of the Boos merge into the [[Big Boo]] fought in the [[Treacherous Mansion]]. The regular Boos all have names that play on "Boo," like in the previous game. Every mission has a Boo hidden in an invisible object that can be revealed only from using the [[Dark-Light Device]]. Once all five Boos are caught in a mansion, a bonus mission for it is unlocked. Boos can create [[Spirit Ball]]s, which make objects invisible, and appear from certain ones only after [[Luigi]] has vacuumed all of them in. A Boo is captured by pulling back on its tongue using the [[Poltergust 5000]] and releasing it by pressing {{button|3ds|A}}, damaging the Boo as it bounces around the room. When it reaches 0 [[Heart Point|HP]], the Boo can be forced into the Poltergust 5000 when attached to the nozzle and shoved inside by Luigi. All captured Boos are located in the Boo Canister in the [[E. Gadd's Vault#Boo Canister|Vault]], each being sent down there after Luigi returns to the [[Lab|Bunker]] from a mission.
 
====''Luigi's Mansion 3''====
{{main|List of Boos in Luigi's Mansion 3}}
[[File:LM3BooArt.jpg|thumb|175px|A Boo in ''Luigi's Mansion 3'']]
Boos are enemies in ''[[Luigi's Mansion 3]]''. Like in previous entries, their names often include "Boo" in it. [[King Boo]] returns as the main antagonist. There is a Boo to catch on every floor except the [[Master Suite]], and a Boo appears on a floor randomly once Luigi has retrieved the [[elevator button]] of that floor. Whenever a Boo is in the room next the player characters, [[Gooigi]] vibrates, as well as the player's controller. One Boo can be located with each [[Boo Finder]]. The music is different in a room with a Boo, which is in the object that vibrates the strongest. The Boo launches a swarm of bats at Luigi if he uncovers the wrong object before fleeing into a different room. A Boo attacks by either spinning towards Luigi to deduct 20 HP or by throwing a [[Bomb (object)|bomb]] at him. When revealed, the Boo has to be caught before Luigi can leave the room. Boos are caught the same way as in ''Luigi's Mansion: Dark Moon'', though every Boo now has 20 HP.


===''Mario Strikers Charged===
===''Super Smash Bros.'' series===
[[File:Boo MSC.jpg|thumb|left|Boo from ''Mario Strikers Charged''.]]
{{main-wiki|SmashWiki|Boo}}
Although Boos do not appear in ''[[Super Mario Strikers]]'', the do appear in its sequel, ''[[Mario Strikers Charged]]''. Boos, along with [[Hammer Bros.]], [[Toad (species)|Toads]], [[Koopa Troopa]]s, [[Birdo (species)|Birdos]], [[Dry Bones]], [[Monty Mole]]s, and [[Shy Guys]], are sidekicks to the many captains. They appear with a helmet with the logo of their team captain. Boos are classified as a playmaker. The only other playmaker are Toads. Their skillshot is [[Possess]]. The given description of the Boos is: "''This ghost can fly up and down the sidelines with great speed, using precise and accurate passing to lead his team to victory. His long-distance shots are quite weak though and his hits are not very powerful. If Boo gets a chance, he can Possess the ball and score at will.''"
In the [[Super Smash Bros. (series)|''Super Smash Bros.'' series]], Boos mostly appear in the form of collectible items. In ''[[Super Smash Bros. Melee]]'', a Boo appears as a collectible [[Trophy (Super Smash Bros.)|trophy]]. In ''[[Super Smash Bros. Brawl]]'', there is another trophy of Boo, as well as a [[Sticker (Super Smash Bros. Brawl)#Boo|sticker]] depicting its artwork from ''Mario Tennis''. In both ''[[Super Smash Bros. for Nintendo 3DS]]'' and ''[[Super Smash Bros. for Wii U]]'', Boos once again received their own collectible trophy; furthermore, ''Super Smash Bros. for Wii U'' gave one an item in [[smashwiki:Smash Tour|Smash Tour]], where using it allows the player to begin a battle while invincible. In ''[[Super Smash Bros. Ultimate]]'', there is a Novice-class Neutral-type primary [[Spirit (Super Smash Bros. Ultimate)|spirit]] of a Boo, using its artwork from ''[[New Super Mario Bros. U]]'', and it can be enhanced to [[King Boo]] at level 99. In [[smashwiki:Adventure Mode: World of Light|World of Light]], the Boo spirit appears in the [[smashwiki:Dracula's Castle (World of Light)|Dracula's Castle]] sub-world of the [[smashwiki:Dark Realm|Dark Realm]]. The spirit battle takes place on the [[Mushroom Kingdom U]] stage, with an invisible grayscale [[Kirby]] as the puppet fighter.
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===''Paper Mario'' series===
Boos appear in the background of the [[Luigi's Mansion (stage)|Luigi's Mansion stage]] in ''Super Smash Bros. Brawl'', ''Super Smash Bros. for Wii U'', and ''Super Smash Bros. Ultimate''. Here, they are very briefly seen flying out the [[Luigi's Mansion (location)|mansion]] when a part of it is knocked down.
====''Paper Mario====
[[File:PMBoo.png|frame]]
The [[Boo's Mansion]] in ''[[Paper Mario]]'' for the Nintendo 64 is a bigger version of the SNES ''Super Mario World'' Ghost Houses, which has many puzzles involving Boos in it. The only difference, is that these Boos are kind, but tricky Boos. After solving these puzzles, [[Lady Bow]], the princess of the Boos, joins Mario's party, in order to destroy [[Tubba Blubba]], who has been terrorizing the native Boos, by having them as a snack. One certain Boo he eats is [[Stanley (Boo)|Stanley]]. Mario helps Lady Bow in order to get the [[Star Spirit]] she has in her possession. In ''[[Paper Mario: The Thousand-Year Door]]'', Bow and [[Bootler]] are seen on vacation in [[Poshley Heights]] after Mario and his teammates defeat the [[Shadow Queen]].


====''Paper Mario: The Thousand-Year Door====
===''Mario & Luigi'' series===
{{pmenemybox
====''Mario & Luigi: Superstar Saga'' / ''Mario & Luigi: Superstar Saga + Bowser's Minions''====
|PM2=yes
[[File:Castleinterior.png|thumb|A Boo chases the Mario Bros. in ''Mario & Luigi: Superstar Saga''.]]
|image=[[File:PM2_Boo.PNG]]
In ''[[Mario & Luigi: Superstar Saga]]'', Boos are enemies that only appear in [[Bowser's Castle]]; they aid [[Bowletta]] along with the rest of the minions who believe her to be Bowser. Outside of battle, they hover around, attacking Mario and Luigi when they are not looking. However, they look away if Mario or Luigi make eye contact. The Boos also show the ability to teleport. In battle, a Boo has two attacks. For the first attack, the Boo will teleport in front of one of the brothers and attempt to bite him. For the second attack, it will fly up into the air and swoop into one of the Mario Bros., which can even [[Prohibited Command|prohibit the use of certain moves or items]]. The former attack can be countered with Mario or Luigi's hammer, whereas the latter can be dodged or countered by jumping. In either of these attacks, if the Boo makes a face, it will target Luigi, if it does not, it will target Mario. Boos are weak to [[Firebrand]] and [[Fire Bros. (move)|Fire Bros.]] They also have low HP, but very high defense.
|hp=7
|atk=3
|def=0
|location=Creepy Steeple, Pit of 100 Trials (Levels 31-40)
|log=A somewhat shy ghost that can make itself or its allies invisible. It may be a ghost, but it's pretty cute.
|items=[[Mini Mr. Mini]], [[Fire Flower]], [[Dizzy Dial]], [[Slow Shroom]]
|moves=Scare (3), Hide (Invisible), Power Transfer (makes an ally Invisible), Float (causes some of the Boos in battle to move high in the air)
|tattle=That's a Boo. It's everyone's favorite ghost. ...Well, most everyone... It's nothing to write home about on the Attack side, but it can turn invisible. If it turns invisible, we won't be able to hit it, so beat it while you can see it. Boos are kinda cute, but I sure wouldn't want to meet one in a dark alley. If I ran into one in the bathroom in the middle of the night, I'd... Well, never you mind what I'd do.
|before=[[Poison Puff|70]]
|#=71
|after=[[Big_Boo#Paper_Mario:_The_Thousand-Year_Door|72]]
}}
In the GameCube game ''[[Paper Mario: The Thousand-Year Door]]'', the Boos live in a tower called [[Creepy Steeple]]. When Mario first enters the steeple there is only one Boo in the room who says that he misses his friends. He will let Mario through one door (Blocking him from using any other doors), where he finds a chest. When he opens it, 200 Boos fly out. The last Boo asks Mario "How many Boos came out of that chest?" If Mario answers correctly the Boo will give him an [[Ultra Shroom]]. If Mario is wrong the Boo will give him one [[Coin]]. Upon returning the main room, the first Boo is still there. He asks if Mario is going to be mean to him. If Mario answers "No", a bunch of Boos (The same ones from the treasure chest) will start flying around the main room, attempting to swarm Mario. If successful, they will throw Mario out of the Steeple, exactly like the [[Sentinel]]s in [[Tubba Blubba's Castle]]. If Mario Spin Attacks them several times, they merge into the [[Big_Boo#Paper_Mario:_The_Thousand-Year_Door|Atomic Boo]]. Once the Atomic Boo is defeated, Mario can fight Boos in other parts of the Steeple. Strangely enough, the original Creepy Steeple Boo sends a letter to Mario that thanks him for freeing his friends, despite the fact that he and his friends attacked him. He signs the letter "[[Creepy Steeple Boo|The Creepy Steeple Boo]]". More Boos can be found in the Pit of 100 Trials. In this game, Boos attack by becoming invisible and getting close to Mario or the partner, then becoming visible and making a glare at him/her, causing 3 damage. The game also introduces a more powerful sub-species, the [[Dark Boo]], which can be found in [[Poshley Sanctum]].
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====''Super Paper Mario====
[[File:MLSS Miner Boo.gif|frame|left]]
{{spmenemybox
Boos wearing mining helmets and brandishing pickaxes also appear in levels 4 and 5 of [[Mysterious Mine Carts]] (levels 3 and 5 in the remake). If these Boos touch Mario, they will cause the loss of a diamond. They will slowly shrink until they disappear if the flashlight is pointed at them.
|align=left
|image=[[File:92_BooCard.PNG|100px]]
|hp=4
|atk=1
|def=0
|location=[[Merlee's Mansion]] (2-2), [[Merlee's Basement]] (2-4), [[Flipside Pit of 100 Trials]] (Room 22)
|card type=Common
|tattle=These spooks only approach when your back is turned. They'd be awesome at "Red light, green light"!
|tippi=That bashful specter is a Boo. It's very fond of dark places... Max HP is 4 and Attack is 1. It will disappear if you stare at it too long... But it will reappear and chase after you the moment you turn your back on it... To outfox it, let it approach with your back turned, then attack or use an item...
|before=[[Dark Cherbil|91]]
|#=92
|after=[[Dark Boo|93]]
}}
Boos return as enemies in ''[[Super Paper Mario]]''. In this game, they turn invisible if Mario looks at them, but they turn visible and chase him if he is not looking at them, similar to in ''Super Mario 64''. To defeat them, the player must approach them from the back and then attack them. Additionally, the [[Flipside Arcade]] houses a Boo themed shooting game, Mansion Patrol. This game has the player shooting Boos (Both Normal, Dark and occasionally Atomic Boos) to score points. A [[Toad]] frequently appears to give power ups, as long as the player saves him from his Boo captor.
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===''Mario & Sonic'' series===
Boos appear in the main game and in ''Minion Quest: The Search for Bowser'' from ''[[Mario & Luigi: Superstar Saga + Bowser's Minions]]''. Boos are flying troopers, and attack by ramming into enemies. Their [[Special Skill (Mario & Luigi series)|Special Skill]], Evasion Cloak, allows them to increase their evasion, depending on how filled the meter that is shown becomes. [[Captain Boo]] appears as a playable captain in the game. When a Boo appears as a captain, they are able to attack the other captain from behind, using [[Sneak Attack]].
[[File:BooMASATOG.png|right|frame|100px]]
Boos are minor, supporting characters in ''[[Mario & Sonic at the Olympic Games]]''. It appears in the version for the [[Wii]] and [[Nintendo DS]]. They are not playable characters, but they can be seen in the crowd with other ''[[Mario (series)|Mario]]'' enemies, including [[Bullet Bill]]s, [[Goomba]]s, and [[Bob-omb]]s. Though Boos do not appear in ''[[Mario & Sonic at the Olympic Winter Games]]'', [[King Boo]] is one of the rivals.


===''Mario Bros.===
[[File:Boo Statue M&LSS sprite.png|frame|right]]
Boos make an appearance in the ''[[Super Mario All-Stars]]'' remake of ''[[Mario Bros. (game)|Mario Bros.]]''. This version of ''Super Mario All-Stars'' is for the [[Nintendo Entertainment System|NES]]. [[Koopa Troopa]]s, who replace [[Shellcreeper]]s, and [[Spiny|Spinies]] also appear in the remakes of ''Mario Bros.'', but not in the same remake as Boos. Boos also replace the green fireballs from the original ''Mario Bros.''.
There are also [[Boo Statue]]s which become invisible and cannot be interacted with when looked directly at. Mario and Luigi must use the [[Tickle]] move to push them while facing backward.


===''Mario's Picross===
====''Mario & Luigi: Partners in Time''====
Boos also make a cameo appearance in the [[Game Boy]] game, ''[[Mario's Picross]]''. They appear in one of the pictures in the "Early Picross" stage in level 6C. The other character that appears in the "Early Picross" stage is [[Mario]], who appears in level 6H. Like their first appearance, ''[[Super Mario Bros. 3]]'', they appear under the name '''Boo Diddley'''.
[[File:PiT Boo.gif|frame]]
During the events of ''[[Mario & Luigi: Partners in Time]]'', Boos appear in [[Bowser's Castle]] of the past. In the field, Boos attack the same way as they did in ''Mario & Luigi: Superstar Saga''. In battle, a Boo attacks by peeking through one of its eyes; peeking with the right eye is Mario, and with the left eye, Luigi. The Boo reappears behind the corresponding bro and charges from behind; this can be avoided or countered with a jump. Boos also appear during the battle with [[Sunnycide]]. While flipped on its back, Sunnycide can summon a Boo to attack Mario or Luigi, which can be countered with a hammer. Also, when a [[Handfake]] has a [[Bowser]] sign, a Boo or a [[Fly Guy]] carries a flame from Bowser's mouth. Dark Boos are found in the [[Gritzy Caves]].


===''Mario Clash===
====''Mario & Luigi: Bowser's Inside Story'' / ''Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey''====
Boos make appearances in the [[Virtual Boy]] game, ''[[Mario Clash]]''. They are among the nine enemies. Some of these enemies include, [[Pokey|Pokeys]], [[Paragoomba|Paragoombas]], and [[Snake (Mario Clash)|Snakes]]. Though ''Mario Clash'' is a new style of ''[[Mario Bros. (game)|Mario Bros.]]'', Boos do not appear in ''Mario Bros.'', but they do appear in a remake. In this game, Boos' objectives are to defeat [[Mario]], but Mario is able to attack a Boo from the side.
[[File:Bis Boo plate sprite.PNG|frame|left|A Boo holding a plate]]
{{multiframe
|[[File:BowserMemoryBoo.png]] [[File:MLBISBJJBowserMemoryBoo.png]]
|A digital Boo.
|align=right
|size=75
}}
Boos make a reappearance in ''[[Mario & Luigi: Bowser's Inside Story]]''. They appear in [[Bowser's Castle#Mario & Luigi: Bowser's Inside Story / Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey|Bowser's Castle]], where they have been brainwashed by [[Fawful]] along with the rest of Bowser's minions once he took over the castle. When Bowser gets to have a feast as a reward for beating [[Midbus]] at the [[Fawful Theater]] show, three Boos serve him food cooked by Fawful himself. However, Bowser is tricked into eating too much food and ends up getting fat, which results in him getting stuck in the floor due to his weight. Boos reappear later in the game to help many of the brainwashed minions of Bowser push the Fawful statue against him. In addition, a Boo appears whenever Bowser gets a [[level up]]. The Boo (just like the [[Fishin' Lakitu]] in Mario's or Luigi's level up screen) holds the circle for getting a bonus upgrade for the stat of the player's choice.


===''Luigi's Mansion===
An odd thing shown in the game is a Boo and [[Koopa Troopa]] in love with each other in Bowser's Castle. They not only love each other, but also love Fawful due to the brainwashing that was put on the minions.
[[File:LMBoo.jpg|thumb|A Boo in ''Luigi's Mansion''.]]
In ''[[Luigi's Mansion]]'', Boos are the main antagonists. King Boo sends a letter to Luigi, stating that he had won a Mansion in a contest. However, Luigi did not enter any contest, but pays no attention, and heads off. Mario goes on ahead, but get captures by the King of the Boos, [[King Boo]]. Luigi has to rescue him from the Boos, using [[Professor Elvin Gadd|E. Gadd]]'s [[Poltergust 3000]]. Luigi manages to find his brother, stuck in a painting. He ends up having to battle King Boo in order to rescue Mario. King Boo sends them to the roof of the Mansion, and uses a Bowser suit to battle him. However, the suit's head could come off once a spikeball was thrown at him, and King Boo would float out, leaving him open for Luigi's Poltergust. After taking away all of his 500 HP, King Boo is turned into a painting, and Mario is restored back to his normal self. However, King Boo manages to escape by unknown means and reappears in several future ''[[Mario (series)|Mario]]'' games.


There are [[List of Boos in Luigi's Mansion|50 Boos]] (51 including King Boo) which Luigi must suck up in the Poltergust 3000. Of these, 15 of them make up the portrait ghost [[Boolossus]], with King Boo as the final Boo. When Luigi attacks them, they usually run away, but occasionally twirl into him to cause damage. It should also be noted that all of the 36 Boos, excluding King Boo and counting Boolossus as one Boo, have puns in their names.
[[Yikk]], a ghost who appears in the same game at the [[Tower of Yikk]], explains that he researches Boos. He even builds a [[Boo-ray Machine|machine]] to visualize Boo transparency waves before he passed away.


===''Game & Watch Gallery 4===
During the fight with [[Bowser Memory M and Bowser Memory L]], Bowser Memory L has an attack that involves a digital Boo chasing him around. The Boo can be jumped on by either Mario or Luigi to stop the attack prematurely.
A Boo appears in the Modern version of ''[[Donkey Kong 3 (Game & Watch)|Donkey Kong 3]]'' in ''[[Game & Watch Gallery 4]]''.  If Mario or Donkey Kong turn their backs, it'll slowly come closer to the player that it's closest to. If it gets close enough, the Boo will either scare Donkey Kong and award the player points (1 player only), or scare Mario and give the player a miss.


===''Dance Dance Revolution: Mario Mix===
[[File:MLBISBJJBoo.png|frame]]
[[File:DDRMMboos.jpg|thumb|left|A Boo with [[Mario]].]]
Boos return in ''[[Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey]]'', where they additionally are found as enemies and recruitable allies in the ''Bowser Jr.'s Journey'' mode. Their special attack is Discord, which [[SPD-Down|lowers the speed]] of enemies.
Some Boos make appearances in ''[[Dance Dance Revolution: Mario Mix]]'' in both regular and giant varieties. Their objective is to try to make [[Mario]] miss a step. If successful, they block Mario's next move. Mario is able to step on regular Boos to hold them back, but he can not do the same to their gigantic counterparts.
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===''Mario Hoops 3-on-3===
====''Mario & Luigi: Dream Team''====
[[File:BooHoops.PNG|thumb|right|Boo from ''Mario Hoops 3-on-3''.]]
[[File:M&LDT Boo Biscuit.png|frame|left]]
A Boo makes an appearance in ''[[Mario Hoops 3-on-3]]''. It appears as an unlockable character. It is unlocked by beating the [[Flower Tourney]] on hard. Boo's special ability is the [[Thriller Dunk]]. This is performed by tapping a ''B''-like shape twice. In the game, the Boo is classified as a tricky character. The other tricky characters are [[Paratroopa]], [[Fly Guy]], and [[Moogle]]. Boo is also one of many of the unlockable characters to not have a baller name.
Boos are referenced in ''[[Mario & Luigi: Dream Team]]''. The game features an item named [[Boo Biscuit]].
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===''Mario Sports Mix===
====''Mario & Luigi: Paper Jam''====
[[File:LMSportsMix.png|thumb|left|Boos seen in the background in ''Mario Sports Mix''.]]
[[File:MLPJShinyPaperBoo.png|frame|left]]
Boos appear in ''[[Mario Sports Mix]]''. They appear as the only members of the crowd in [[Luigi's Mansion (place)#Mario Sports Mix|Luigi's Mansion]] circling around the court. Their appearances are in [[Basketball]] and [[Volleyball]] matches and their laughs can also be heard during the game. Mainly, they can be heard when the player gets a point.
Boos appear in ''[[Mario & Luigi: Paper Jam]]'' in a minigame where the player has to save a Toad by running away from a Boo and avoiding firebars and bombs. Like in many other games, this Boo will stop if the Mario Bros. look at it, and will follow them if they look away. Boos can also be seen carrying Papercraft Boos, along with Papercraft King Boo. Their [[Paper Boo|paper versions]] also appear as regular enemies in the haunted side of [[Gloomy Woods]]. [[King Boo]] also appears as a boss in [[Gloomy Woods]]. [[Boo Biscuit]]s also return from ''[[Mario & Luigi: Dream Team]]''.
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===''Mario & Luigi'' series===
===''Mario vs. Donkey Kong'' series===
====''Mario & Luigi: Superstar Saga====
====''Mario vs. Donkey Kong''====
[[Image:Castleinterior.png|thumb|right|A Boo chases the Mario Bros.]]
{{multiframe
{{MLinfobox
|[[File:MvsDK Boo.png]]<br>[[File:MvDKNSBoo.png|100px]]
|image=[[File:MLSS_Boo_Idle.gif]]
|name=Boo
|align=left
|align=left
|hp=10
|speed=110
|def=1000
|location=[[Bowser's Castle]]
|item=[[1-Up Mushroom]], Random Slacks
|exp=40
|coins=10
}}
}}
In ''[[Mario & Luigi: Superstar Saga]]'', Boos are enemies that only appear in [[Bowser's Castle]]. Outside of the battle, they hover around, attacking Mario and Luigi when they are not looking. However, they look away if Mario or Luigi make eye contact. The Boos also show the ability to teleport outside battle. In battle, they fly up into the air, and fall back down into the Mario Bros., and even prohibit the use of certain moves. These Boos are unknowingly aiding [[Bowletta]], thinking she is the actual Bowser. They are weak to [[Fire Bros.]]
Boos are enemies in ''[[Mario vs. Donkey Kong]]'' and [[Mario vs. Donkey Kong (Nintendo Switch)|its remake]]. They act similarly to their appearances in platforming games. Boos appear in both segments of [[Level 5-4 (Mario vs. Donkey Kong)|Level 4-4]] and in [[Level 5-4+|Level 4-4+]] only. Boos cannot be defeated, and they grow and stick their tongue out if they defeat [[Mario]] or a [[Mini Mario (toy)|Mini-Mario]]. The remake depicts Boos with a more toylike appearance, and Boos float towards [[Toad]] in co-op play if his back is turned away, but stop moving if looked at.<ref>{{cite|author=NintendoEurope|date=January 26, 2024|title=Find out if two heads really are better than one in #MarioDonkeyKong's new co-op mode! Pass a controller to a friend and tackle the puzzle-platforming challenges together (and let Toad get a bit of glory too!).|url=x.com/NintendoEurope/status/1750866179407655354|publisher=X|accessdate=February 1, 2024}}</ref>
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====''Mario & Luigi: Partners in Time====
====''Mini Mario & Friends: amiibo Challenge''====
{{pitenemy
{{multiple image
|image=[[File:Boo Pit.png]]
|align=right
|location=[[Baby Bowser's Castle]]
|direction=horizontal
|hp=15 (18)
|footer=Boos in their active and inactive states in ''Mini Mario & Friends: amiibo Challenge''
|power=25 (24)
|image1=MM&FaC boo on.jpg
|defense=25 (20)
|width1=41
|speed=22 (23)
|image2=MM&FaC boo off.jpg
|experience=5
|width2=76
|coins=4
|items=
|related=[[Dark Boo]]
|notice=Stats in parentheses are from the Japanese and European versions of the game if they differ from the original American stats.<ref>[http://themushroomkingdom.net/mlpit_guide.shtml TMK Mario & Luigi: Partners in Time Enemy Guide]. Some stats were changed from the original American version of the game to the Japanese and European versions.</ref>
}}
}}
During the events of ''[[Mario & Luigi: Partners in Time]]'', Boos appear in [[Bowser's Castle]] of the past. Mario, Luigi, [[Baby Mario]], and [[Baby Luigi]] meet a lot of them while trying to reach the end of Baby Bowser's Castle. In the field, Boos attack the same way as they did in ''Mario & Luigi: Superstar Saga'', but in-battle they fight differently, and have significantly decreased defense. They cover their faces, but when they start to attack, the Boo would take one of its hands off one of its eyes, showing who it is about to attack. If it shows its right eye, it will attack Mario, but if it shows its left eye, it is attacking Luigi. Then it would appear from behind, and charge towards one of the Mario Bros.. However, this could easily be countered with a jump. They also appear during the battle with [[Sunnycide]]. After the Mario Bros. flip the egg monster over, Sunnycide could summon a Boo to attack Mario or Luigi. [[Dark Boo]]s also return in the game, and are found in the [[Gritzy Caves]]. Also, when a [[Handfake]] has a [[Bowser]] sign, a Boo or a [[Fly Guy]] carries a flame from Bowser's mouth.
Boos are enemies in ''[[Mini Mario & Friends: amiibo Challenge]]''. They are depicted with a toylike design. Boos appear in every level of [[Moonlight Mansion]], as well as levels [[Star 3]] and [[Star 5]] in the [[Star World (Mini Mario & Friends: amiibo Challenge)|Star World]]. Boos float in mid-air, with some of them staying in a single position and others moving back and forth horizontally or vertically. Boos are invincible. They become harmless if they enter the light coming from a [[Candle]], making it possible for the [[Mini]]s to bypass them as the Boos stop in place and cover their eyes.
 
===''Mario Pinball Land''===
Boos are enemies in ''[[Mario Pinball Land]]''. [[Big Boo]] is one of the bosses. A Boo is defeated if hit from behind, rewarding 2,000 points. A Boo becomes transparent if Mario tries to pass through it and does not take damage. Boos sometimes vanish and reappear elsewhere in the area.
 
===''Dance Dance Revolution: Mario Mix''===
Boos are obstacles in ''[[Dance Dance Revolution: Mario Mix]]''. Boos try to get the player character to miss a step, blocking his next move if successful. Boos can be held back if the stepped on, unlike their gigantic counterparts.
 
===''Mario Baseball'' series===
[[File:Boo-Batting-MSS.png|thumb|left|Boo prepares to bat in ''Mario Super Sluggers'']]
Boo is playable in ''[[Mario Superstar Baseball]]''. It is on Wario's team as a starter. Boo is tied with Peach with its pitching, losing only to [[Bowser]] and [[Waluigi]]. Its special running and fielding move is a [[Super Jump (Mario Baseball series)|Super Jump]]. Its running and batting are weak, but its fielding is very poor. The only worse fielder in the game is [[Bowser]].
 
Boo makes another appearance in ''[[Mario Super Sluggers]]''. It is on Wario's team once again, and it can be unlocked in [[Wario City]] by finding it in between boxes and completing its challenge. Like its predecessor, Boo has the highest ranked pitch in the game, along with Peach (9/10). Despite its pitching being very high, its stamina is very poor, but its other stats range from average to low. Boo displays good chemistry with [[King Boo]], [[Shy Guy]], [[Magikoopa]], and [[Blooper]]. It has bad chemistry with [[Mario]], [[Luigi]], [[Yoshi]], [[Baby Mario]], [[Baby Luigi]], [[Baby Peach]], and [[Baby Daisy]].
 
There is a new item named [[Mini Boo]]s that, when activated, turn the ball invisible for a short period of time. If used against a computer, the player stops moving until the Boos go away. If used when a special hit is in effect, the Boos do nothing.
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====''Mario & Luigi: Bowser's Inside Story====
===''Super Princess Peach''===
[[File:Bis Boo plate sprite.PNG|frame|left|A Boo holding a plate.]]
[[File:SPPBoo.png|frame]]
Boos make a reappearance in ''[[Mario & Luigi: Bowser's Inside Story]]''. They appear in Bowser's Castle, after being brainwashed by Fawful, and they also help many of the former minions of Bowser push the Fawful statue against the power-upped Bowser. In addition, a Boo appears whenever Bowser gets a level up. The Boo (just like the Lakitu in Mario's or Luigi's level up screen) holds the circle for getting a bonus upgrade for the stat of the players choice.
Boos are enemies in ''[[Super Princess Peach]]''. Boos behave like they do in ''Super Mario Bros. 3''. Besides the returning Big Boos and [[Blindfold Boo]]s, the game introduces an angry variety, [[Mad Boo]]. King Boo also returns as a boss.


[[Yikk]], a ghost who appears in the same game at the [[Tower of Yikk]], explains that he researches Boos. He even builds a [[Boo-ray Machine|machine]] to visualize Boo transparency waves before he passed away.
===''Mario and the Incredible Rescue''===
[[File:MarioAndIncredibleRescue.jpg|thumb|120px|Two Boos appear on the front cover of ''Mario and the Incredible Rescue'']]
Ghosts, as they are called generically, are enemies in ''[[Mario and the Incredible Rescue]]''. Two of them are displayed on the cover, one depicting its artwork from ''[[Mario Kart: Super Circuit]]'' and the other from ''[[Luigi's Mansion]]''. Ghosts capture [[Princess Peach]] and take her to [[Bowser's Castle]], and Mario has a vision of six ghosts surrounding her. The ghosts are defeated eventually from a spell cast on them, sending them flying out of the castle.
{{br}}


An odd thing shown in the game is a Boo and [[Koopa Troopa]] in love with each other in Bowser's Castle. They not only love each other, but also love Fawful, due to the brainwashing that was put on the minions.  
===''Mario Hoops 3-on-3''===
Boo is an unlockable playable character in ''[[Mario Hoops 3-on-3]]''. It is billed as a Tricky player. Boo's special ability is the [[Thriller Dunk]]. Boo can be unlocked by completing the [[Flower Tourney]] on hard difficulty.


===''Mario vs. Donkey Kong===
===''Mario Strikers Charged''===
A Boo appears in ''[[Mario vs. Donkey Kong]]''. Throughout the whole game, they make only one appearance in the [[Spooky House]]. It uses its regular battle strategy, which is attacking Mario when his back is turned and looking away when Mario turns around. The Boo sticks its tongue out at [[Mario]] if he is about to lose a life.
{{quote|This ghost can fly up and down the sidelines with great speed, using precise and accurate passing to lead his team to victory. His long-distance shots are quite weak though and his hits are not very powerful. If Boo gets a chance, he can Possess the ball and score at will.|Description}}
[[File:Boo Orange Yoshi MSC.jpg|thumb|left|Boo from ''Mario Strikers Charged'']]
Boos are sidekicks in ''[[Mario Strikers Charged]]''. They wear a helmet with the logo of their team captain. Boos are classified as a playmaker, like [[Toad (species)|Toads]]. They have [[Possess]] as their skillshot.
{{br}}
{{br}}


===''Mario Pinball Land===
===''Mario & Sonic'' series===
[[File:Boo-piranha.jpg|thumb|left|A group of Boos with [[Petey Piranha]] in ''Mario Pinball Land''.]]
{{multiframe|align=left|[[File:BooMASATOG.png]]|size=130|A sprite of a Boo from the Nintendo DS version of ''Mario & Sonic at the Olympic Games''}}
In ''[[Mario Pinball Land]]'', Boos appear in certain areas in the game. [[Mario]] cannot hit them at the front because they will become transparent as Mario passes through them. If Mario hits one of the Boos on its back, the Boo disappears and it is worth two-thousand points. They occasionally will disappear and reappear to another spot in the area.
In the [[Mario & Sonic (series)|''Mario & Sonic'' series]], Boos mainly appear in a few events, sometimes also as audience members. In the [[Wii]] version of ''[[Mario & Sonic at the Olympic Games (Wii)|Mario & Sonic at the Olympic Games]]'', Boos appear as an item in [[Dream Race (Mario & Sonic at the Olympic Games for Wii)|Dream Race]], where they temporarily follow whoever is in first place, or second if the player in the lead uses it, causing them to lose speed. It is possible for multiple Boos to follow a character at once, causing them to remain at a lower speed, but a [[Power Sneakers|High Speed]] item can remove them. In the [[Mario & Sonic at the Olympic Games (Nintendo DS)|Nintendo DS version]], Boos penalize the player if they perform two consecutive fouls in the [[100m (Mario & Sonic at the Olympic Games for Nintendo DS)|100m]], [[400m (Mario & Sonic at the Olympic Games for Nintendo DS)|400m]] or [[400m Hurdles (Mario & Sonic at the Olympic Games for Nintendo DS)|400m Hurdles]] events, and in [[Dream Basketball]], a Boo blocks one of the baskets if a [[Chaos Emerald]] is used. Both versions of ''Mario & Sonic at the Olympic Games'' include Boos as part of the audience in various events. In the Nintendo DS version of ''[[Mario & Sonic at the Olympic Winter Games (Nintendo DS)|Mario & Sonic at the Olympic Winter Games]]'', Boos are items in three events: [[Ski Cross Racing]], where they can steal [[Ring (Sonic the Hedgehog)|Rings]] and items from players ahead of the user; [[Extreme Snowboarding]], where Boos steal items from opponents in front and deplete the energy in their trick gauge; and [[Ski Shooting]], where Boos will simply steal an item from an opponent if they have any. In the Nintendo 3DS version of ''[[Mario & Sonic at the Rio 2016 Olympic Games (Nintendo 3DS)|Mario & Sonic at the Rio 2016 Olympic Games]]'', Boos appear in [[Archery Plus]], where they carry around the targets and disappear upon being shot.
 
Boos appear in some of the minigames. In the Nintendo DS version of ''Mario & Sonic at the Olympic Games'', Boos appear in two minigames: [[Conveyor Belt (minigame)|Conveyor Belt]], as one of the characters needing to be sorted, and [[Shoot!]], as one of the enemies to be hit. In ''[[Mario & Sonic at the London 2012 Olympic Games (Wii)|Mario & Sonic at the London 2012 Olympic Games]]'', Boos also appear in some minigames in the London Party mode, which itself has some Boos that can be spoken to play minigames and earn stickers.
[[File:M&S 2012 The Ghostly Tower.png|thumb|King Boo talking to a Boo in [[The Ghostly Tower]]]]
Boos have also had some of their own collectible items. In the Wii version of ''Mario & Sonic at the London 2012 Olympic Games'', one of the unlockable [[Mii]] outfits is a jersey featuring a Boo design. In the [[Nintendo 3DS]] version of ''[[Mario & Sonic at the London 2012 Olympic Games (Nintendo 3DS)|Mario & Sonic at the London 2012 Olympic Games]]'', a [[List of badges in Mario & Sonic at the London 2012 Olympic Games (Nintendo 3DS)|badge]] of a Boo can be obtained from the badge machine.


A Big Boo also appears as one of the game's bosses. He is the boss of the haunted house and can only be damaged by hitting it from behind.
In [[Nintendo 3DS]] version of ''[[Mario & Sonic at the London 2012 Olympic Games (Nintendo 3DS)|Mario & Sonic at the London 2012 Olympic Games]]'', a Boo first appears in the Story Mode trying to scare people away from the [[Tower of London]] with the [[Phantasmal Fog]], and is then followed by [[Sonic]] and [[Tails]] who challenge the Boo and King Boo to an Olympic [[Event]], with the Boos fleeing when they lose. A single Boo also appears at the opening ceremony. A Boo also appears in [[Mario's Defeat?!]], in which it fails to bring Mario to the [[London Tennis Club]] but helps set up the match with a Goomba transformed to look like Mario, and later celebrates with the other minions when they notice that Bowser seems to be back to his usual self.
{{br}}
 
===''Mario Sports Mix''===
Boos are non-playable characters in ''[[Mario Sports Mix]]''. They are encountered during [[Mario Sports Mix#Basketball|Basketball]] and [[Mario Sports Mix#Volleyball|Volleyball]] matches in [[Luigi's Mansion (location)#Mario Sports Mix|Luigi's Mansion]], where Boos circle around the court. Boos make laughter sounds, especially when a player character scores.
 
===''Captain Toad: Treasure Tracker''===
[[File:TreasureTracker-E32014-Screenshot11.png|thumb|A shy Boo in ''Captain Toad: Treasure Tracker'']]
Boos return in ''[[Captain Toad: Treasure Tracker]]'' and [[Captain Toad: Treasure Tracker (Nintendo Switch / Nintendo 3DS)|its ports]]. They are mostly the same as in ''Super Mario 3D World'', but with some differences. Boos and [[Big Boo]]s can be defeated quickly using either Toad's or Toadette's headlamp. Boos disappear while interacted with on the touch screen or with the pointer functionality; this does not reward any [[coin]], unlike most enemies.


===''Super Princess Peach===
===''Mario Sports Superstars''===
[[File:SPPBoo.png|frame|right]]
[[File:Card SuperRare Boo.png|thumb|left|A Super Rare Boo card from ''Mario Sports Superstars'']]
Boos appear in [[Princess Peach|Princess Peach's]] first starring game, ''[[Super Princess Peach]]''. They act as normal Boos, hiding their face when Peach looked, and attacking when Peach has her back turned. However, there is an angry variety called the [[Mad Boo]], which attacks the opposite way. They attack when Peach looks at them, and gander around for her when she looks away. Big Boos and their vibe counterparts, a new subspecies called [[Mad Big Boo]]s, also appear.
Boo is a playable character in ''[[Mario Sports Superstars]]''. He is a starter captain-type who is billed a Technique player, giving him an advantage in accuracy or horse control, except in tennis, which bills him a Tricky type. Boo's rallies curve in tennis, making the trajectory of his shots less predictable. Boo has a default drive of 213 yards and shots that travel medium-low in a draw trajectory in golf.


King Boo also appears, as one of the bosses of the game. He will attack Peach by shooting fireballs at her, but she can use these to light the candles on the wall, damaging him. His vibe during the game is Gloom, which he will use to douse the candles.
===''Mario + Rabbids'' series===
====''Mario + Rabbids Kingdom Battle''====
[[File:MoonlightSonata MarioRabbids.png|thumb|A Boo in [[Moonlight Sonata]] from ''Mario + Rabbids Kingdom Battle'']]
Boos are obstacles in ''[[Mario + Rabbids Kingdom Battle]]''. They warp to certain areas during the turn transition between the heroes and enemies. If a Boo converges on a character, it will follow said character and force them to warp to a random spot on the battlefield along with the Boo. Additionally, one of [[Rabbid Mario]]'s Melee weapons has a design based on a Boo, and in [[Spooky Trails]], several Boos can be found ensnared by ghostly chains, as well as a [[Boo Balloon]] that was merged with a [[Rabbid]] and a phonograph, becoming the [[Phantom (boss)|Phantom]].


===''Super Smash Bros. Brawl===
====''Mario + Rabbids Sparks of Hope''====
[[File:BrawlTrophy169.png|thumb|100px|left|The trophy of a Boo, from ''Super Smash Bros. Brawl''.]]
While no Boos appear in ''[[Mario + Rabbids Sparks of Hope]]'', the laugh of one can be heard if the [[Spark (Mario + Rabbids Sparks of Hope)|Spark]] [[Vampastra]] applies its Vamp Attack ability to Mario, and he uses his Dual Slingers to attack. In the [[Rayman in the Phantom Show]] DLC, Boos make cameos as the Spooky Trails banners from the first game.
As well as appearing as a [[trophy]] in ''[[Super Smash Bros. Brawl]]'', Boos make cameos in the [[Luigi's Mansion (place)#Super Smash Bros. Brawl|Luigi's Mansion stage]]. When a part of the mansion is knocked down, Boos are seen flying out.
{{br}}
{{br}}


==General Information==
===''Dr. Mario World''===
===Appearance===
[[File:DMW Dr Boo Artwork.png|thumb|left|Artwork of Dr. Boo in ''Dr. Mario World'']]
[[File:Boo_History.PNG|frame|right|''Boos'' as they appear in various games.]]
Boos are assistants in ''[[Dr. Mario World]]'' as of October 31, 2019. Its effect in stage mode is to fill the skill meter faster when yellow [[virus]]es are eliminated, where it fills more at higher levels. The percentage determines the number of points the skill meter fills, so for example at level 3, it fills 30% faster, meaning that for each yellow virus eliminated, an extra 0.3 points is added to the skill meter. In versus mode, its effect is to increase the speed the skill meter fills for both the user and their opponent, in which the amount of points required to fill the skill meter is reduced by the listed percentage. If both players use this assistant, the effect stacks. The resulting amount of points required to fill the skill meter is rounded down to the nearest round number.
Though their specifics change from game to game, Boos are usually bashful, cowardly, spherical ghosts. They have black eyes and fangs. Although they are typically white in color there are sub-species of the Boo race which appear in different colors, such as [[Red Boo|pink]]. From ''[[Luigi's Mansion]]'' onward, it became common to picture Boos sticking out their tongues. Since ''[[Super Mario 64]]'', Boos have been portrayed with a unique, high-pitched laugh. In actuality, this laugh is the same as [[Bowser]]'s, sped up several times<ref>[http://www.youtube.com/watch?v=crx21K5uMIk Video comparison of Boo and Bowser's laughs]</ref>. However, Boos got a new laugh starting in the [[Hide and Boo Seek]] mini game, being more of a haunting laugh than before. Although most species of Boo will cover their faces and become intangible when looked at, they will often sneak behind their victim and strike when their back is turned. Due to their ghostly abilities, Boos are generally invulnerable, and cannot be harmed by ordinary means of attack. While this is true, they are not invincible, and are especially vulnerable to the light. If they are exposed to a source of light, Boos are usually weakened, and in some cases they may even perish. Usually, they can also have other weaknesses. Because of their intolerance to the light, Boos will often hide if they are trapped in lit rooms. While the ghosts generally appear to be more afraid of their victims than their victim is of them, this is not always the case. Some Boos have absolutely no problem meeting their victim's gaze, and will even try to attack. Boos tend to have a taste for the fine arts, as seen in ''[[Paper Mario]]'' and ''[[Mario Party 4]]''. The best way to defeat a Boo is to sneak behind it so it cannot see the player and disappear, or to set a trap for the Boo while the player's back is turned (ie: using an item, or in ''[[Super Paper Mario]]'', a Pixl).


Boos are often characterized by their sub-species; despite their similarities in appearance and attack manner. Boo species tend to wildly differ in size, with some such as [[Boo Buddy|Boo Buddies]] being miniature, while others such as the [[Big Boo]]s boast gigantic size.  
A Boo was added as a doctor under the name '''Dr. Boo''' on September 24, 2020. His skill is represented by the Boo shielding his face, after which he shows his face and tongue. In stage mode, he immediately eliminates objects in a random 2 x 2 area, similar to [[Fire Mario|Dr. Fire Rosalina]]'s skill but it affects a smaller area. In versus mode, he eliminates objects in a 1 x 1 area at level 1, a 2 x 2 area at level 2 and a 3 x 3 area at level 3 to 5 (the skill meter fills faster at higher levels). This skill prioritizes areas that contain [[virus]]es, but if there are no more viruses, the area in which is targeted will be random as long as it contains at least one object.


In ''[[Luigi's Mansion]]'', [[Professor E. Gadd]] notes that Boos have mysterious powers that increase when they gather together in large groups. While it is difficult to stop them, they can be weakened if one is able to defeat members of the group.
===Other appearances===
====''The Legend of Zelda: Link's Awakening''====
{{main-wiki|ZeldaWiki|Boo|Zelda Wiki}}
[[File:TLOZ LA remake Boos.jpg|thumb|Boos as they appear in the remake of ''The Legend of Zelda: Link's Awakening'']]
Boos in ''[[The Legend of Zelda: Link's Awakening]]'' only appearing in a dark room in the games' second dungeon, [[zeldawiki:Bottle Grotto|Bottle Grotto]]. They actively chase [[Link]] regardless of whether he is facing them or not; if Links swings his sword at them, they disappear and reappear at a different location. After Link lights up the room, they become vulnerable and can then be defeated with [[zeldawiki:Magic Powder|Magic Powder]]. In the [[Nintendo Switch]] remake of the game, they now use their voice clips from the ''Super Mario'' franchise, and a Boo figure can be won from the [[zeldawiki:Trendy Game|Trendy Game]] after clearing the [[zeldawiki:Key Cavern|Key Cavern]] and placed in the [[zeldawiki:Quadruple|Quadruples]]' house. The text that appears upon acquiring the figure reads, "''You got a Boo figure! As spooky ghosts go, this one's pretty cute!''"


Boos have few predators, their only known threat being a [[Clubba]] named [[Tubba Blubba]]. This is first seen in ''Paper Mario'', when he began devouring Boos; this, however, may have been his revenge for the countless times the ghosts scared him.
====''Minecraft''====
[[File:Minecraft Mario Mash-Up Boo.jpg|thumb|left|Boo as it appears in ''Minecraft'']]
Additionally, in the Super Mario Mash-up in ''[[Minecraft]]'', Ghasts are replaced by Boos.


===Tools===
====''Monopoly Gamer''====
*[[Boo's Sheet]] - ''[[Paper Mario: The Thousand-Year Door]]
Boo is a playable character in ''[[Monopoly Gamer]]''. It is sold separately as a "Power Pack" expansion figure.
*[[Fright Bomb]] - ''[[Super Mario RPG: Legend of the Seven Stars]]
{{br|left}}
*[[Boo Bell]] - ''[[Mario Party 2]]
 
*[[Boo's Crystal Ball]] - ''[[Mario Party 4]]
===Unused appearances===
====''Super Mario Odyssey''====
Boos [[List of Super Mario Odyssey pre-release and unused content|were going to appear physically]] in ''[[Super Mario Odyssey]]'', as one is seen in concept art for the game, but they were removed from the game,<ref>{{cite|author=Brian|date=October 3, 2018|title=New Super Mario Odyssey concept art shows a ton of scrapped costume ideas|url=nintendoeverything.com/new-super-mario-odyssey-concept-art-shows-a-ton-of-scrapped-costume-ideas/|publisher=Nintendo Everything}}</ref> making this game the first game in the ''Super Mario'' series to not contain Boos since ''[[Super Mario Land]]''. However, [[Princess Peach|Peach]] wears a Boo mask on the side of her head when she visits [[Bowser's Kingdom]], a common way to wear masks of ''{{wp|yōkai}}'' in festivals in Japan.


===Habitat===
====''The Super Mario Bros. Movie''====
Boos typically make their homes in dark forests, such as the [[Forever Forest]] and [[Boo Woods]], and tend to be most commonly found in older buildings such as mansions, castles, and [[Ghost House|Ghost Houses]]. Although most of them live in such dwellings, they also seem to enjoy wastelands. One of the only known Boo villages lies in [[Gusty Gulch]].
Boos were planned to appear in the film, as they can be seen in early concept artwork for the [[Dark Land]]s, but they were removed from the final release.<ref>{{cite|author=GameXplain|date=April 23, 2023|title=Toadsworth & Toadette were in the Super Mario Bros. Movie?! Concept Art LEAK Reveals Cuts & Changes|url=www.youtube.com/watch?v=b2KZXJg3ncA|publisher=YouTube|accessdate=April 23, 2023}}</ref> However, their leader, [[King Boo]], makes an appearance during the wedding between [[Bowser]] and [[Princess Peach|Peach]].
They are typically found in groups because their fears make them find strength in big numbers.


===Allegiance===
==General information==
Though most Boos tend to side with [[King Boo]], they seem to, for the most part, actually stand as neutral. For example, Boos are by now a common enemy in most side-scrolling games; however, in the ''Paper Mario'' series and now increasingly in the multiplayer games, Boos have been seen to take the side of the [[Mushroom Kingdom]]. Lady Bow, in fact, helped Mario save the kingdom in ''[[Paper Mario]]''. In another example, the Boos in the [[Creepy Steeple]] from ''[[Paper Mario: The Thousand-Year Door]]'' attack Mario initially, but later in the game Mario is sent a friendly letter from one of them. King Boo, on the other hand, has several times been shown to wish nothing but terrible things for [[Luigi]] (but this could be accredited to Luigi being easily scared, making him a prime target for most Boo antics). They also have attacked [[Bowser]] in some games.
===Physical appearance===
[[File:Boo art04.png|thumb|left|A laughing Boo with a shy Boo]]
{{multiframe
|[[File:Boo model SMBW.png|100px]][[File:Bigger Boo SMW2YI Artwork.png|100px]][[File:LMBoo.jpg|100px]][[File:SMS Boo Artwork.jpg|100px]]
|(Clockwise from the top left) The Boo's ''Super Mario Bros. Wonder'' design, the ''Super Mario World 2: Yoshi's Island'' design, ''Super Mario Sunshine'' design, and ''Luigi's Mansion'' design
|size=200
|align=right
}}
Though their specifics change from game to game, Boos are usually bashful, cowardly, spherical ghosts. They have black beady eyes and fangs. Although they are typically white, there are sub-species of the Boo race that appear in different colors, such as [[Red Boo|pink]]. From ''[[Luigi's Mansion]]'' onward, it became common to picture Boos sticking out their tongues. Boos often have wide open grinning mouths with their tongue sticking out. In most games, Boos are unable to change their facial expressions. The only exception is when they are looked at, in which case they bashfully cover their faces along with the section around their eyes blushing red or pink. However, the ''Luigi's Mansion'' and early ''Paper Mario'' games portray Boos as being more expressive than in other games, being able to frown, scowl, or even smirk. Since ''[[Super Mario 64]]'', Boos have been portrayed with a unique, high-pitched laugh. Both this laugh and [[Bowser]]'s laugh are derived from the same stock recording of a human man laughing recorded by [[Charles Martinet]];<ref>{{file link|Charles Martinet and the Comical Laugh Pt 2.png}}</ref> it was sped up for the Boos and slowed down for Bowser. However, Boos received a new laugh starting in ''[[Mario Power Tennis]]'', being more of a haunting laugh than before. Although most species of Boo will cover their faces and become intangible when looked at, they will often sneak behind their victim and strike when their back is turned. Due to their ghostly abilities, Boos are generally invulnerable and cannot be harmed by ordinary means of attack. Despite this, they are not invincible and are especially vulnerable to the light. If they are exposed to a source of light, Boos are usually weakened, and in some cases, they may even be defeated. Usually, they can also have other weaknesses. Because of their intolerance to the light, Boos will often hide if they are trapped in lit rooms. However, King Boo claims that Boos cannot truly be killed. While the ghosts generally appear to be more afraid of their victims than their victim is of them, this is not always the case. Some Boos have absolutely no problem meeting their victim's gaze, and will even try to attack. Boos tend to have a taste for the fine arts, as seen in ''[[Paper Mario]]'' and ''[[Mario Party 4]]''. In ''[[Luigi's Mansion: Dark Moon]]'' it is shown that Boos will actually save someone if only later to trick them. This is seen when Luigi watches through pipe in the [[Old Clockworks]] as a Yellow Toad balances on a ledge. Some Boos appear and watch the Toad before it falls off the ledge, which is later found to be quite a drop, the Boos show a large amount of concern and shock when this happens before diving down for the Toad. The Toad is later found in a painting because of the Boos.


==Profiles and Statistics==
Boos are often characterized by their sub-species despite their similarities in appearance and attack manner. Boo species tend to vary wildly in size, with some such as [[Boo Buddy|Boo Buddies]] being miniature, while others such as the [[Big Boo]]s boast gigantic size.
===Lil' Boo's Stats, ''Super Mario RPG: Legend of the Seven Stars===
*'''HP''' 66
*'''Attack''' 120
*'''Defense''' 20
*'''Magic Attack''' 74
*'''Magic Defense''' 120


===The Big Boo's Stats, ''Super Mario RPG: Legend of the Seven Stars===
In ''[[Luigi's Mansion]]'', [[Professor E. Gadd]] notes that Boos have mysterious powers that increase when they gather together in large groups. While it is difficult to stop them, they can be weakened if one is able to defeat members of the group. Although in ''Luigi's Mansion: Dark Moon'' this does not seem to affect them or King Boo in any way suggesting that they do not always need to be in groups anymore.
*'''HP''' 43
*'''Attack''' 18
*'''Defense''' 0
*'''Magic Attack''' 18
*'''Magic Defense''' 24


===Trophies from the [[Super Smash Bros. (series)|''Super Smash Bros.'' series]]===
Boos have few predators, their only known threat being a [[Spike]] named [[Tubba Blubba]] in ''Paper Mario'', when he began devouring Boos. This, however, may have been his revenge for the countless times the ghosts scared him.
====''Super Smash Bros. Melee====
====Color variations====
{|border=1 cellpadding=1 cellspacing=0 width=100%
Boos come in many different colors. The following is a list of all known Boos and the first appearance of the respective Boo.
{|class="wikitable"style="text-align:center;width:80%"
|-
|-
!width=100px|Name!!width=100px|Image!!width=150px|Game!!|Description
!width="10%"|Image
!width="30%"|Color
!width="30%"|First appearance
|-
|-
!Boo
|[[File:MPA Boo.png]]
|[[File:Trophy209.PNG|100px]]
|White
|align=center|''Super Mario Bros. 3''<br>02/90
|''[[Super Mario Bros. 3]]''
|''These shy spirits inhabit Mario's world and have been known to vanish or freeze when met face-to-face. In recent years, they seem to have overcome their fears in order to pursue tennis and other social activities. They usually appear in groups and fly in formation. From time to time, giant Boos make surprise appearances.''
|-
|-
|}
|[[File:MPA Boo blue.png]]
 
|Blue
====''Super Smash Bros. Brawl====
|''[[Super Mario World]]'' (as [[Big Boo]]s)
{|border=1 cellpadding=1 cellspacing=0 width=100%
|-
|[[File:MPA Boo red.png]]
|[[Red Boo|Red]]
|''[[Super Mario Bros. Deluxe]]''
|-
|-
!width=100px|Name!!width=100px|Image!!width=200px|Game!!|Description
|[[File:SMBDX Green Boo.png]]
|Green
|''Super Mario Bros. Deluxe''
|-
|-
!rowspan=2|Boo
|[[File:BlackBoo.png]]
|rowspan=2|[[File:BrawlTrophy169.png|100px]]
|Black
|align=center|'''NES''' ''Super Mario Bros. 3''
|''Super Mario Bros. Deluxe''  
|rowspan=2|''A bashful ghost who draws near when your back is turned but shyly stops and disappears when you face it. Boos have been seen recently in activities like baseball and tennis, so it's thought that they may have conquered their fear of humans. Boos are also characterized by having a variety of different weaknesses between forms.''
|-
|-
|align=center|'''DS''' ''Yoshi's Island DS''
|[[File:Bootler.png|50px]]
|Chartreuse
|''[[Paper Mario]]''  
|-
|-
|}
|[[File:Lady Bow PM2.png|60px]]
 
|Mint
=====Sticker Information=====
|''Paper Mario''
{|border=1 cellpadding=3 cellspacing=0 style="text-align:center" width=100%
|-
|-
!width=120px|Image!!|Game!!|Effect
|[[File:Herbert.png]]
|Brown
|''Paper Mario''
|-
|-
|[[File:BooTennis64.PNG|100x100px]]
|[[File:Lahla.png|65px]]
|''Mario Tennis''
|Light-blue
|[Throwing] Attack +14
|''[[Paper Mario: The Thousand-Year Door]]''  
|-
|-
|
|Yellow
|''[[Mario Party DS]]''
|}
|}


===Information from Mario Sports Games===
===Tools===
===='''''[[Mario Superstar Baseball]]''''' Information====
*[[Boo's Sheet]] - ''[[Paper Mario: The Thousand-Year Door]]
*'''Type:''' Technique
*[[Fright Bomb]] - ''[[Super Mario RPG: Legend of the Seven Stars]]
*'''Starting Team Captain:''' [[Wario]]
*[[Boo Bell]] - ''[[Mario Party 2]]
*'''Status:''' Player
*[[Boo's Crystal Ball]] - ''[[Mario Party 4]]
*'''Stats:'''
*[[Boo Biscuit]] - ''[[Mario & Luigi: Dream Team]]
**'''Batting:''' 3/10
 
**'''Pitching:''' 8/10
===Habitat===
**'''Fielding:''' 2/10
Boos typically make their homes in dark forests, such as [[Forever Forest]] and the [[Boo Woods]], and tend to be most commonly found in older buildings such as mansions, castles, and [[Ghost House]]s. Although most of them live in such dwellings, they also seem to enjoy wastelands. One of the only known Boo villages lies in [[Gusty Gulch]].
**'''Running:''' 4/10
*'''Player Profile:'''
They are typically found in groups because their fears make them find strength in big numbers.
**'''Strength:''' Pitching
 
**'''Special Talents:''' Super Jump
===Allegiance===
**'''Trajectory:'''
Though most Boos tend to side with Bowser and [[King Boo]], they seem to, for the most part, actually stand as neutral. For example, Boos are by now a common enemy in most side-scrolling games; however, in the ''Paper Mario'' series and now increasingly in the multiplayer games, Boos have been seen to take the side of the [[Mushroom Kingdom]]. Lady Bow, in fact, helped [[Mario]] save the kingdom in ''[[Paper Mario]]''. In another example, the Boos in the [[Creepy Steeple]] from ''[[Paper Mario: The Thousand-Year Door]]'' attack Mario initially, but later in the game Mario is sent a friendly letter from one of them. King Boo, on the other hand, has several times been shown to wish nothing but terrible things for the heroes, but especially [[Luigi]] (although this could be accredited to Luigi being easily scared, making him a prime target for most Boo antics). They also have attacked [[Bowser]] in some games, such as the [[Mario Party (series)|''Mario Party'' series]], mainly from ''[[Mario Party 5]]'' to ''[[Mario Party 8]]''.
***'''Field:''' Center
 
***'''Height:''' Normal
===Language===
*'''Star Pitch:''' Curveball
As hinted in the game ''[[Super Mario Galaxy]]'', Boos have their own unique language called Booish. It most probably is spoken only by Boos since Mario cannot understand it. However, upon absorbing a [[Boo Mushroom]] and turning into [[Boo Mario]], he gains the ability to read it, if not speak it as well.
*'''Star Swing:''' Center
 
*'''Sweet Spot:''' The Boo face on the bat
''[[Paper Mario]]'' also features Boos replacing certain words with "Boo", possibly as a part of the Booish language:
*'''Compatible Relationships:''' [[Wario]], [[Magikoopa]], [[King Boo]]
<blockquote>
*'''Bio:''' ''"Bowser's underling ghost. Behind the scary face lies a very shy soul. Look most Boos in the eyes and they'll cover their faces...but turn around and they'll attack you! Boos confuse their enemies by flickering in and out of the visible realm, appearing at inconvenient times."''
''I am so bored!! Boo-ored!


====''[[Mario Hoops 3-on-3]]====
''Boo-st of luck!
*'''Type:''' Tricky
*'''Special Shot:''' [[Thriller Dunk]]
*'''Letter to Tap:''' B


====''[[Mario Tennis Open]]====
''Hey, what can I Boo for you?
*'''Type:''' Tricky
*'''Bio:''' ''Boo can seriously curve balls to the left and right. Boo's shots, especially the Slice, are literally very tricky. Also, Boo can quickly catch balls with a ghostly ability, even distant ones.''
*'''Bio 2:''' ''You never know what to expect with Boo - he can bend shots to his left or right and can even use his ghostly abilities to reach distant balls.''


===''Mario Party 7'' Info===
''It's going to be the most Boo-tiful wedding ever!
*'''Partner:''' [[Dry Bones]]
</blockquote>
*'''Special Orb:''' [[Magic Orb|Magic/Surprise]]


===''Mario Party 8===
==Profiles and statistics==
*'''Website Bio:''' ''Scare up some extra excitement as Boo and get ready for a ghoulishly good time!''
{{main|List of Boo profiles and statistics}}
*'''Team Names:'''
===''[[Mario & Luigi: Superstar Saga]]''===
**''Mario:'' Soul Bros.
{{:Mario & Luigi: Superstar Saga bestiary|transcludesection=Boo|align=horizontal|image=[[File:MLSS Boo Idle.gif]]}}
**''Luigi:'' Scaredy Pants
 
**''Peach:'' Boo-for-Teas
===''[[Paper Mario: Color Splash]]''===
**''Yoshi:'' Hovering Friends
{{:Paper Mario: Color Splash bestiary|transcludesection=Boo|align=horizontal|image=[[File:PMCS Boo Idle Animated.gif]]}}
**''Wario:'' Double-Dealers
 
**''Daisy:'' High Spirited Duo
===''Super Mario RPG'' (Nintendo Switch)===
**''Waluigi:'' Total Creeps
{{:Monster List|transcludesection=Boo}}
**''Toad:'' Doom 'n' Shroom
 
**''Toadette:'' Boo Duet
==Gallery==
**''Birdo:'' Unfair Pair
{{main-gallery}}
**''Dry Bones:'' Scary Pair
<gallery>
**''Blooper:'' Creature Feature
SMW Art - Boo Buddies.png|''[[Super Mario World]]''
**''Hammer Bro:'' Bad Vibes
MP2 Boo Artwork.png|''[[Mario Party 2]]''
BooTennis64.png|''[[Mario Tennis (Nintendo 64)]]''
MPA Boo Artwork.jpg|''[[Mario Party Advance]]''
Boo Artwork - Mario Party Island Tour.png|''[[Mario Party: Island Tour]]''
Boo Artwork - Mario Golf World Tour.png|''[[Mario Golf: World Tour]]''
</gallery>


===''[[Mario Party DS]]===
==Audio samples==
*'''Trophy:''' This ghostly creature is a common sight. Do you think he's a nice guy? Ask him. He's right behind you.
{{media table
|file1=Boo Laugh 1.oga
|title1=''[[Super Mario 64]]''
|description1=A Boo's laugh
|file2=Ghost-005.oga
|title2=''[[Luigi's Mansion]]''
|description2=A Boo's laugh
|file3=Boo Laugh 2.oga
|title3=''[[New Super Mario Bros.]]''
|description3=A Boo's laugh
|file4=Boo Laugh 3.oga
|title4=''[[New Super Mario Bros.]]''
|description4=A Boo's laugh
|file5=Super Mario Galaxy Boo laugh.oga
|title5=''[[Super Mario Galaxy]]''
|description5=A Boo's laugh
}}


==Names in Other Languages==
==Names in other languages==
{{Foreignname
{{foreign names
|Jap=テレサ
|Jap=テレサ
|JapR=Teresa
|JapR=Teresa
|JapM=From 「照れる」 ''tereru'' (to be shy)
|JapM=From「{{ruby|照|て}}れ{{ruby|屋|や}}」(''tere-ya'', a very shy person) and possibly「~さ」(''-sa'', a nominalizing suffix meaning "-ness") Romanized in ''Super Mario World'' as "''Telesa''".
|SpaA=
|Jap2=テレサ({{ruby|小|しょう}})
|SpaAM=Boo
|Jap2N=''Yoshi's Island DS''
|SpaE=Boo
|Jap2R=Teresa (Shō)
|SpaEM=-
|Jap2M="Boo (Small)", in comparison to [[Big Boo]]
|Jap2C=<ref>{{cite|language=ja|publisher=[[Shogakukan]]|title=「ヨッシーアイランドDS任天堂公式ガイドブック」 (''Yoshi's Island DS Nintendo Kōshiki Guidebook'')|page={{file link|YIDS Shogakukan P22.jpg|22}}|isbn=978-4-09-106361-8|date=April 11, 2007|quote=「テレサ({{ruby|大|だい}}・{{ruby|小|しょう}})」}}</ref>
|ChiS=害羞幽灵
|ChiSR=Hàixiū Yōulíng
|ChiSM=Shy Ghost
|ChiS2=嘘嘘鬼
|ChiS2N=prior to ''Mario Tennis Aces''
|ChiS2R=Xūxū Guǐ
|ChiS2M=From「嘘」(''xū'', "boo") and「鬼」(''guǐ'', "ghost")
|ChiS3=淘气鬼
|ChiS3N={{file link|Mario Happy Meal 2016 CN Promotional Image.jpg|McDonald's China, Winter 2016 Happy Meal promotion}}
|ChiS3R=Táoqìguǐ
|ChiS3M=Scallywag
|ChiS2C=<ref>{{cite|author=无敌阿尔宙斯|language=zh-hans|date=August 28, 2013|deadlink=y|archive=web.archive.org/web/20170227153847/http://tieba.baidu.com/p/2560204606|title=神游 超级马力欧世界 敌人官译|publisher=Baidu Tieba|accessdate=July 27, 2024}}</ref>
|ChiT=害羞幽靈
|ChiTR=Hàixiū Yōulíng
|ChiTM=Shy Ghost
|ChiT2=幽靈
|ChiT2N=[[LINE#Talking Super Mario Animated Stickers|Talking ''Super Mario'' Animated Stickers]]
|ChiT2R=Yōulíng
|ChiT2M=Ghost
|ChiT2C=<ref>{{cite|url=store.line.me/stickershop/product/5835/zh-Hant|language=zh-hant|title=超級瑪利歐兄弟有聲動態貼圖 – LINE貼圖 {{!}} LINE STORE|publisher=LINE STORE|accessdate=July 3, 2021}}</ref>
|Dut=Boo
|Fre=Boo
|Fre2=Fantôme
|Fre2M=Ghost
|Fre3=Les amis de Boo
|Fre3N=''Super Mario World'' instruction booklet
|Fre3M=Boo's friends
|Fre4=Boo Buddy
|Fre4N=''Hotel Mario''
|Fre4C=<ref>{{cite|url=www.oldiesrising.com/noticespdfV2/Philips%20CDi/Hotel%20Mario.pdf|title=French ''Hotel Mario'' instruction booklet|format=PDF|page=9}}</ref>
|Ger=Buu Huu
|Ger=Buu Huu
|GerM=Boo Hoo
|GerM=Boo Hoo
|Ger2=Buu-Baby<ref>{{cite|author=Menold, Marcus, Claude M. Moyse, and Andreas G. Kämmerer, editors|title=''Der offizielle Nintendo Spieleberater "Super Mario World"''|language=de|location=Großostheim|publisher=[[Nintendo|Nintendo of Europe GmbH]]|date=1993|page=19}}</ref>
|Ger2M=Boo Baby
|Ger2N=''Super Mario World''
|Ita="Boo" Diddly
|Ita2=Boo
|Ita3=Boo Hoo
|Ita3N=''Mario Kart DS''
|Ita4=Fischio
|Ita4M=Whistle; literal translation from "to boo"
|ItaC=<ref>{{cite|title=''Super Mario Bros. 3'' Italian instruction booklet|url=www.mariocastle.it/risorse/manuali/super-mario-bros-3/39.jpg|format=JPG|page=38|publisher=Nintendo|language=it}}</ref>
|Ita4C=<ref>{{cite|title=[[List of New Super Mario Bros. Wii trading cards|''New Super Mario Bros. Wii'' - Album ufficiale]]|page=6}}</ref>
|Kor=부끄부끄
|Kor=부끄부끄
|KorR=Bukkeubukkeu
|KorR=Bukkeu-bukkeu
|KorM=Onomatopoeia of being shy
|KorM=Partial repetition of 부끄럽다 (''bukkeureopda'', to be shy)
|Chi=害羞幽靈 (Traditional)<br>''Hàixiū Yōulíng''<br>嘘嘘鬼 (Simplified)<br>''Xūxū Guǐ''
|ChiM=Shy Ghost<br>&nbsp;<br>&nbsp;<br>&nbsp;
|Fra=Boo
|FraM=-
|Por=Bu
|Por=Bu
|PorM=Boo
|PorM=Boo
|Dut=Boo
|PorC=<ref>Detona (October 17, 2024). [https://www.youtube.com/watch?v=G-b0z0pRq4o Super Mario Party Jamboree - Jornada das Tarefas - Completo 100%]. ''Youtube''. Retrieved October 23, 2024.</ref>
|DutM=-
|Por2=Monstro
|Rus=Привидение<br>''Prividenie''
|Por2N=''The Adventures of Super Mario Bros. 3''
|RusM=Ghost}}
|Por2M=Monster
|Por2C=<ref>[https://www.youtube.com/watch?v=uLmERqyWbF4&list=PLwzf4mOPE8Bmhgll2-ndwQWhRpiCUMR6G&index=7 Super Mario Bros. 3 - Tempestade no Reino (Dublagem Herbert Richers)]</ref>
|Rom=Bau Bau
|RomN=''The Adventures of Super Mario Bros. 3''
|RomM=Boogeyman
|RomC=<ref>{{cite|date=May 20, 2015|language=ro|url=ok.ru/videoembed/26892634756|title="Reign Storm", dubbed in Romanian by KidsCo|publisher=Odnoklassniki (OK.ru)|accessdate=May 24, 2024}}</ref>
|Rom2=Fantomă
|Rom2N=''Super Mario World'' television series
|Rom2M=Ghost
|Rom2C=<ref>May 20, 2015. [http://ok.ru/videoembed/26859866756 "Ghosts 'R' Us", dubbed in Romanian by KidsCo]. ''Odnoklassniki (OK.ru).'' Retrieved January 4, 2016.</ref>
|Rom3=Boo
|Rom3N={{file link|McDonaldsRomania2016Banner.jpg|McDonald's Romania, Summer 2016 Happy Meal promotion}}
|Rus=Бу
|RusR=Bu
|RusM=Boo
|Rus2=Привидение
|Rus2N=prior to ''Luigi's Mansion: Dark Moon'' + its official website
|Rus2R=Prividenie
|Rus2M=Ghost
|SpaA=Boo
|SpaA2=Bú
|SpaA2N=2010-2017
|SpaA2M=Boo
|SpaE=Boo
}}
 
==References==
<references/>


==Gallery==
==External links==
{{morepic}}
{{NIWA|SmashWiki=1|Ukikipedia=1|ZeldaWiki=1}}
===StrategyWiki===
*[[strategywiki:Super_Mario_Bros._3/Enemies|Boo § ''Super Mario Bros. 3'']]
*[[strategywiki:Super_Mario_World/Enemies#"Boo"_Buddy|Boo "Buddy" § ''Super Mario World'']]
*[[strategywiki:Super_Mario_64/Enemies#Boo|Boo § ''Super Mario 64'']]
*[[strategywiki:Super_Mario_Sunshine/Enemies#Boo|Boo § ''Super Mario Sunshine'']]
*[[strategywiki:New Super Mario Bros./Enemies|Boo § ''New Super Mario Bros.'']]
*[[strategywiki:Super_Mario_Galaxy/Enemies#Boo|Boo § ''Super Mario Galaxy'']]
*[[strategywiki:New Super Mario Bros. Wii/Enemies#Ghosts|Boo § ''New Super Mario Bros. Wii'']]
*[[strategywiki:Super_Mario_Galaxy_2/Enemies#Boo|Boo § ''Super Mario Galaxy 2'']]
*[[strategywiki:New_Super_Mario_Bros._2/Enemies#Boos|Boo § ''New Super Mario Bros. 2'']]
*[[strategywiki:Mario_Kart_Super_Circuit/Items#Boo|Boo § ''Mario Kart: Super Circuit'']]
*[[strategywiki:Mario_Kart_DS/Items#Boo|Boo § ''Mario Kart DS'']]
*[[strategywiki:Paper Mario: The Thousand-Year Door/Enemies|Boo § ''Paper Mario: The Thousand-Year Door'']]
*[[strategywiki:Super Paper Mario/Enemies|Boo § ''Super Paper Mario'']]


==Trivia==
===Other wikis===
*Boo's ''Mario Strikers Charged'' outfits resembles the [[Spooky Speedster]]'s outfit.
*[https://zeldadungeon.net/wiki/Boo_Buddy Boo Buddy on Zelda Dungeon Wiki]
*The manual for ''Mario Kart DS'' refers to the item Boo as "Boo Hoo".
*[https://triforcewiki.com/wiki/Boo Boo on Triforce Wiki]
*Creator [[Shigeru Miyamoto]] got the idea for Boo from the wife of his co-worker and close friend [[Takashi Tezuka]], as she is shy but one day got very angry at him for coming home late from work.<ref>http://www.guardian.co.uk/technology/gamesblog/2010/sep/13/games-gameculture</ref>
*Boo's old laugh is just a sped up version of [[Bowser]]'s laugh with echoes added.<ref>http://www.youtube.com/watch?v=crx21K5uMIk</ref>
*Strangely, in ''[[Mario Golf: Toadstool Tour]]'', Boo hits right-handed, but in the ''[[Mario Baseball (series)|Mario Baseball'' series]]'', it hits left-handed.
*In the ''[[nookipedia:Animal_Crossing_(series)|Animal Crossing]]'' games, a character named [[nookipedia:Wisp|Wisp]] appears, who bears a resemblance to Boo. The main difference is the facial appearance, and headgear.
*In ''[[Super Mario Sunshine]]'', the Boos are the only Boos that can be defeated by jumping on them outside of the ''Mario'' RPG titles.
*''[[wikirby:Mumbies|Mumbies]]'', enemies from the ''[[wikirby:Kirby (series)|Kirby]]'' series, attack in an identical way to Boos.
*''[[Mario & Luigi: Bowser's Inside Story]]'', the plate held by a Boo in [[Bowser's Castle]] has the Pigmask logo from ''Mother 3''.


==References==
{{navboxes|
<references/>
{{BoxTop}}
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{{Boos}}
{{Boos}}
{{Super Mario Bros. 3}}
{{SMB3}}
{{TAOSMB3}}
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{{The Adventures of Super Mario Bros. 3}}
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{{Super Mario World TV}}
{{SMK}}
{{MK}}
{{SML2}}
{{SML2}}
{{MB}}
{{MB}}
{{Yoshi's Safari}}
{{Yoshi's Safari}}
{{Hotel Mario}}
{{HM}}
{{Yoshi's Island}}
{{YI}}
{{Super Mario RPG}}
{{Mario Clash}}
{{SMRPG}}
{{SM64}}
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{{MK64}}
{{EBBMB}}
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{{MP2}}
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{{MT}}
{{MT N64}}
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{{PM}}
{{MP3}}
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{{SMSS}}
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{{LM}}
{{Super Mario Sunshine}}
{{MP4}}
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{{MG}}
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{{M&LSS}}
{{MGAT}}
{{MVDK}}
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{{PM2}}
{{PMTTYD}}
{{Mario Pinball Land}}
{{MPL}}
{{MPT}}
{{MP6}}
{{MP6}}
{{YTT}}
{{MPA}}
{{DDRMM}}
{{MSB}}
{{MSB}}
{{MKAGP}}
{{SPP}}
{{SPP}}
{{MP7}}
{{MP7}}
{{MFb}}
{{MKDS}}
{{PiT}}
{{M&LPIT}}
{{NSMB}}
{{NSMB}}
{{Mario Hoops 3-on-3}}
{{MH3O3}}
{{Yoshi's Island DS}}
{{YIDS}}
{{MKAGP2}}
{{SPM}}
{{SPM}}
{{MSC}}
{{MP8}}
{{MP8}}
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{{M&SATOG}}
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{{Mario Super Sluggers}}
{{Mario Super Sluggers}}
{{NSMB Wii}}
{{M&SATOWG}}
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{{MP9}}
{{MP9}}
}}
{{MTO}}
[[Category:Boos]]
{{NSMB2}}
[[Category:Koopa Troop]]
{{PMSS}}
[[Category:Enemies]]
{{NSMBU}}
[[Category:Species]]
{{LMDM}}
[[Category:Undead]]
{{MKAGPDX}}
[[Category:Major Races]]
{{SM3DW}}
[[Category:Playable Characters]]
{{MPIT}}
{{YNI}}
{{MK8}}
{{CTTT}}
{{MP10}}
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{{SMM}}
{{MTUS}}
{{M&LPJ}}
{{MM&FaC}}
{{M&SATROG}}
{{PMCS}}
{{MPSR}}
{{SMR}}
{{Mario Sports Superstars}}
{{M+RKB}}
{{MPTT100}}
{{MTA}}
{{SMP}}
{{SMM2}}
{{MKT}}
{{DMW}}
{{PMTOK}}
{{MKLHC}}
{{MGSR}}
{{MPS}}
{{SMBW}}
{{SMPJ}}}}
[[Category:Boos|*]]
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[[Category:Hosts]]
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[[Category:Shopkeepers]]
[[Category:Merchants and Salespeople]]
[[Category:Bowser Jr.'s Journey allies]]
 
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[[Category:Super Smash Bros. Ultimate spirits]]
[[Category:The Adventures of Super Mario Bros. 3 enemies]]
[[Category:Yakuman DS]]
[[Category:Yoshi (game)]]
[[Category:Yoshi Topsy-Turvy enemies]]
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[[Category:Yoshi's Island: Super Mario Advance 3]]
[[Category:Yoshi's New Island enemies]]
[[Category:Yoshi's Safari enemies]]
[[Category:Yoshi's Story enemies]]
[[de:Buu Huu]]
[[it:Boo]]

Latest revision as of 18:13, October 23, 2024

This article is about the ghost enemies that appear throughout the Super Mario franchise. For the microgame from WarioWare: D.I.Y. Showcase, see Boo (microgame). For the area in Mario Party 10, see Boo (area).
"Boo Buddy" redirects here. For the circular group of Boos, see Boo Buddies.
Not to be confused with Bloo.
Boo
Artwork of a Boo in Mario Party Superstars
Artwork from Mario Party Superstars
First appearance Super Mario Bros. 3 (1988)
Latest appearance Super Mario Party Jamboree (2024)
Latest portrayal Sanae Suzaki (2004-present)
Variants
Comparable
Notable members
“Mind turning around for a minute?”
Boo, Paper Mario: Color Splash

Boos (originally known as "Boo" Diddlys,[1] a nod to American R&B singer Bo Diddley, and later Boo Buddies[2][3][4][5][6][7] or simply Ghosts[8]) are recurring ghost enemies that first appear in Super Mario Bros. 3. They are a type of white spherical ghost with menacing and normally open mouths. They are known for their large tongues and small stubby arms. However, the most distinctive characteristic of the Boos is their shy personality, as they cover their faces when someone looks directly at them, but then uncover and move after the character when their back is turned; this exact behavior is used by Mumbies in the Kirby series.

Shigeru Miyamoto got the idea for Boo from the wife of his coworker and close friend Takashi Tezuka, as she is shy but one day got very angry with him for coming home late from work.[9][10]

History[edit]

Super Mario series[edit]

Super Mario Bros. 3 / Super Mario Advance 4: Super Mario Bros. 3[edit]

A Boo Diddley from Super Mario Bros. 3
Artwork of a "Boo" Diddly from Super Mario Bros. 3, its debut appearance

"Boo" Diddlys[11] appear in Super Mario Bros. 3. They are first encountered in World 2-Fortress. A "Boo" Diddly shields its face if looked at, but chases the player character if not looked at. "Boo" Diddlys can be defeated only from either the effects of a Hammer Suit or a Starman, or from a Koopa shell. "Boo" Diddlys have a variant, Stretches "Boo" Diddlys are depicted with either a dark-blue or dark-red outline in the Family Computer and Nintendo Entertainment System version, depending on the level.

Super Mario World / Super Mario World: Super Mario Advance 2[edit]

SMWBoo.png

"Boo" Buddies (called "Boo" Diddlys earlier in development[12] appear in Super Mario World and its reissue. They are encountered in the Ghost House levels. "Boo" Buddies behave identically but move slower than before, a consistency retained throughout the Super Mario series. "Boo" Buddies change their face very briefly if looked at for long enough. "Boo" Buddies appear to have multiple tails. Groups of them make a variety of facial expressions. More varieties are introduced in the game, including Boo Buddy Blocks, Boo Buddy Snakes, Boo Crews, Circling Boo Buddies, Eeries, Disappearing Boo Buddies, and the Big Boo. A "Boo" Buddy is defeated only from the effects of Super Stars or being hit by a Grab Block.

Super Mario Land 2: 6 Golden Coins[edit]

Boo Buddies appear in Super Mario Land 2: 6 Golden Coins. Compared to other games, they move in a slower, wave-like pattern toward Mario. Boo Buddies in this game are found in the Pumpkin Zone. A thrown Green Shell can defeat it. A variant named Ghost Goombas also appears in this game.

Super Mario 64 / Super Mario 64 DS[edit]

“Ghosts...don't...DIE! Heh, heh, heh! Can you get out of here...alive?”
Message from Big Boo's Haunt
Boo
In-game model from Super Mario 64
Big Boo in the game Super Mario 64 DS.
In-game model from Super Mario 64 DS

Boos (also called Baby Boos)[13] appear in Super Mario 64 and Super Mario 64 DS. They use their design from Mario Party 4 in the latter version. Boos are encountered in the courtyard of Peach's Castle and in Big Boo's Haunt. Big Boos are recurring mini-bosses in the latter location, as well as a different Big Boo in the Big Boo Battle stage in the remake only. When Boos are looked at, they become partially visible, but are fully opaque otherwise and follow the player character. Boos take away two units of health on contact. The Boos in the courtyard hold a Yellow Coin each, and those in Big Boo's Haunt each have a Blue Coin; the remake changes the former instance to Red Coins until the player collects all eight and then the Power Star. Boos are defeated from either a punch, a kick, a Pound the Ground attack, or Luigi's spin jump in the remake only. Boos cannot be defeated by Yoshi in the remake, and it is spit out if Yoshi attempts to do so.[14] A line of dialogue displays each time a Boo is defeated in the first mission of Big Boo's Haunt.[15] A Boo appears in the hallway of the Mushroom Castle after twelve Stars are collected, or eight in the remake. By selecting the sixth mission of Big Boo's Haunt in the remake directly, a Boo wearing a Luigi's cap appears in the stage.

Super Mario Bros. Deluxe[edit]

Boos as they appear in Super Mario Bros. Deluxe in order of speed. Green Boo SMBD Redboo.png BlackBoo.png
The Boos from
Super Mario Bros. Deluxe,
arranged by speed

Boos appear in Super Mario Bros. Deluxe. They are competitors in the "You VS. Boo" mode, competing to reach the flagpole before the player can. Boos do not damage the player character on contact. If the Boo is defeated within a time frame, it flies away, being replaced by a faster green Boo, then by a faster red Boo, and lastly a Black Boo[16] with a yellow outline. The Black Boo travels in a way mimicking the player's best time.

Super Mario Sunshine[edit]

Boos return in Super Mario Sunshine. They have a different design consisting of drooping eyelids, blue circles around their black pupils, and long, coiled tails, due to being made of goop.[17] They are encountered in Sirena Beach only, inside of Hotel Delfino. Two varieties of Boo appear, Pink Boos and Sleepy Boos, and the boss fought below Hotel Delfino is King Boo. Boos move around in slow, swooping motions. They do not react if looked at. There are Boos that are mostly invisible, besides a distorted visual effect, but spraying them with water makes them become increasingly visible. The invisible Boos take on disguises such as Yellow Coins or Blue Coins, differentiated only from not spinning at a constant pace, or Shadow Mario, differentiated by appearing lighter colored, lacking the magic brush, and the Shadow Mario theme not playing. If a disguised Boo is approached, it laughs and bumps into Mario, unless it has been sprayed prior.

New Super Mario Bros.[edit]

A Boo from New Super Mario Bros.

Boos appear in New Super Mario Bros. They are encountered in Ghost Houses and World 8-1. They act the same as in Super Mario Bros. 3, though the ways of defeating them include a Shell, a Starman, a Mega Mushroom, or a Blue Shell. The game introduces Balloon Boos, which inhale air to inflate themselves, and Broozers, which are boxers.

Super Mario Galaxy[edit]

Screenshot from Super Mario Galaxy showing Mario look at a Boo

Boos appear in Super Mario Galaxy. They are encountered in the Ghostly Galaxy, the Bigmouth Galaxy (in underwater areas), the Deep Dark Galaxy, and the Sand Spiral Galaxy only. Boos become transparent when the player character looks at them, but are opaque and go after the player character if they are not looking. A Boo can be defeated mainly from any ray of light, or when touched by Rainbow Mario. Boos can be spun off course from a spin attack. A large Boo in Deep Dark Galaxy has a Power Star in it during the secret mission. Varieties that appear include Atomic Boo and the debuting Bomb Boos, and there is a Boo character who is raced, the Spooky Speedster. One of the power-ups, Boo Mario, has the player character become a Boo, retaining only his face and cap. Boos are attracted to Boo Mario and follow him. If a Boo hits Boo Mario, he does not take damage but does lose the power-up.

Captain Toad also indirectly suggests that Boos eat people, as he worried that Luigi might have been eaten by ghosts.

New Super Mario Bros. Wii[edit]

Boos return in New Super Mario Bros. Wii. They are depicted with a blue glow. Boos are encountered in Ghost Houses only. They behave identically as in New Super Mario Bros. Varieties that appear include Big Boos, Broozers, and Circling Boo Buddies. Every Ghost House on the world map has a Boo who watches the player character and laughs whenever he either enters or is kicked out from losing a life. Once the level is cleared, the Boo only covers its face henceforth. Boos are defeated only from the effects of a Star.

Super Mario Galaxy 2[edit]

Boos appear in Super Mario Galaxy 2. They behave identically as in Super Mario Galaxy. They are encountered in Haunty Halls Galaxy, Boo Moon Galaxy, Battle Belt Galaxy, and Slimy Spring Galaxy, the latter two having the underwater type. Besides Bomb Boos returning, two variants make their debut: Octoboos, a cross between an Octoomba and Boo, and Mega Boos, larger than even Big Boos.

Super Mario 3D Land[edit]

Boos appear in Super Mario 3D Land. They behave similarly as before, but disappear briefly if hit by a tail whip from Tanooki Mario or one of Fire Mario's fireballs. Their laugh is similar as in Super Mario 64. Aside from Big Boos returning, two more variants are introduced: Tail Boos, which have a tanooki tail, and Peepas, which move in a set pattern.

New Super Mario Bros. 2[edit]

Boos return in New Super Mario Bros. 2. They are encountered in Ghost Houses. There are Boos in World 4-Ghost House that push the wall either left or right, and they are not shy of being looked at. Boos otherwise are the same as in New Super Mario Bros. Wii, except they can be defeated from the effects of either a Star or Gold Flower. Aside from Peepas returning, the game introduces the giant Boohemoths and Gold Boos, which Boos transform into while a Gold Ring during the effects of a Gold Ring.

New Super Mario Bros. U / New Super Mario Bros. U Deluxe[edit]

Artwork from New Super Mario Bros. U

Boos appear in New Super Mario Bros. U and its port. They are the same as before, though Baby Yoshis can defeat Boos. Big Boos and Circling Boo Buddies both also return. Boos appear in an Enemy Course in the haunted area of Soda Jungle, where a Flying ? Block with the Super Star is required to defeat them.

Super Mario 3D World / Super Mario 3D World + Bowser's Fury[edit]

Boos appear in Super Mario 3D World and its port. Their only differences are cosmetic, being more transparent, having a blueish glow like in New Super Mario Bros. Wii and its sequels unless stared at, in which case they have a reddish glow while emitting steam. Big Boos and Peepas also return.

Super Mario Maker subseries[edit]

Super Mario Bros. styled Boos from Super Mario Maker
Super Mario Bros. styled Boos from Super Mario Maker
Super Mario Bros. styled Boos from Super Mario Maker
Super Mario Bros. styled Boos from Super Mario Maker

Boos are course elements in Super Mario Maker, its port, and Super Mario Maker 2. They have newly designed sprites for the Super Mario Bros. style, but are otherwise the same as in other entries of the Super Mario series. Boos can be inserted into Bill Blasters, Blocks, a Koopa Clown Car, tracks, or Warp Pipes. Boos can be shaken to become Boo Buddies or dragged on to platforms to become Stretches. Applying a Super Mushroom to a Boo changes it into a Big Boo, while giving it wings gives it faster movement. Boos in Koopa Clown Cars affect the vehicle to stop and close its eyes when looked at and sneak up on the player while they are not looking.

Super Mario Run[edit]

Boo from Super Mario Run

Boos appear in Super Mario Run. They are encountered in Ghost House levels. Boos cover their eyes and float up and down while looked at, including if they are close to the player's vertical position, and turn to look at the player character. Boos otherwise follow in a quick, wavy motion. Boos are defeated by either jumping backward over them using a Backflip Block or a Wall Jump. The pink P Switch of certain levels defeat every Boo on-screen. Boos drop Keys, Coins, or Color coins upon defeat, with the item being slightly visible before their defeat. Boos in the level Dark and Stormy are defeated whenever lightning strikes happen. Boo cannot leveled. Besides Boos, Stretches also return.

There is a Boo Statue in Kingdom Builder, which has an interaction where it briefly covers its eyes.

Super Mario Bros. Wonder[edit]

King Boo in Super Mario Bros. Wonder
King Boo with several other Boos in Super Mario Bros. Wonder

Boos are enemies in Super Mario Bros. Wonder. They are designed similarly to their older artworks but still stick their tongues out. Boos behave identically as before, and are defeated upon contact with rays of light, like in Super Mario Galaxy. Besides Boos, King Boo appears during one of the Wonder Effects.

DIC cartoons[edit]

The Adventures of Super Mario Bros. 3[edit]

A "Boo" Diddly in The Adventures of Super Mario Bros. 3 episode "Reign Storm".

Boos appear infrequently in The Adventures of Super Mario Bros. 3. They are depicted with red eyes and yellow teeth. "Boo Diddlys" in the episode "Reign Storm" assist King Koopa by terrorizing the Mushroom Shopping Mall.

Two Boo Diddlys appear in "Misadventures in Babysitting", where they are found in the dungeon sneaking behind and spooking Junior. The same Boos are scared off by Luigi who makes a scary face at them. They are seen once more fleeing from lava caused by Kooky.

Super Mario World television series[edit]

Yoshi encountering a ghost in the Super Mario World television series episode "The Night Before Cave Christmas".

Ghosts, as they are called, appear in the episodes "Ghosts 'R' Us," "The Night Before Cave Christmas," and "The Yoshi Shuffle" of Super Mario World. They are designed much differently than in the previous show, being depicted similarly to their in-game sprite. "Ghosts 'R' Us" features a group of ghosts and a Big Boo chasing Yoshi through Wizenheimer's haunted house. "The Night Before Cave Christmas" includes ghosts that scare Yoshi away. "The Yoshi Shuffle" includes ghosts in the audience at the start of the episode.

Nintendo Adventure Books[edit]

The cover of Koopa Capers.
Boos chasing Luigi on the front cover of Koopa Capers, the fourth of the Nintendo Adventure Books

In Koopa Capers, a Boo confronts Luigi if he decides to simply look through a keyhole in a fortress door, instead of barging through it. If Luigi decides to run away from it immediately, he will successfully escape, but if he decides to stand his ground, the Boo will chase him onto some floating blocks after he dodges its attack. Making a beeline for the door after mounting the blocks will allow the Boo to catch Luigi, but doing evasive techniques will allow him to escape it. When he begins his descent into the Magma Pit, Luigi will hear a Boo behind him, which causes him to pick up the pace, and escape it.

Illustrations of a Boo are used in puzzles in Dinosaur Dilemma and Flown the Koopa, though none appear in the actual stories.

Super Mario World: Mario to Yoshi no Bōken Land[edit]

Mario, Luigi, Yoshi, and many Boos inside a Ghost House in Super Mario World: Mario to Yoshi no Bōken Land.
Boos swarming Luigi, Yoshi, and Mario from Super Mario World: Mario to Yoshi no Bōken Land

In the interactive OVA Super Mario World: Mario to Yoshi no Bōken Land, Boos appear in a Ghost House that Mario, Luigi, and Yoshi are passing through. A Boo starts following Luigi, who is in the back, but every time he turns around, it disappears. Finally, he quickly does a double take, and turns just in time to see it re-materialize. He panics and Boos start swarming the group. Mario grabs a candle and lights it, which repels the Boos, and one drops a key they need to progress.

Yoshi[edit]

Boo Buddies are objects in Yoshi. They are one of six types of objects to fall on the play field. Boo Buddies are depicted similarly as in Super Mario World.

Mario Kart series[edit]

Super Mario Kart[edit]

Ghost (Boo) from SMK
Ghost from Super Mario Kart

Ghosts[18] are items in "2 Player" mode and background elements of Ghost Valley 1 Ghost Valley 2, and Ghost Valley 3 in Super Mario Kart. Using a Ghost item makes the user become transparent temporarily as the Ghost steals any item available from an opponent. Ghosts in the background laugh as the player character drives by.

Mario Kart 64[edit]

BooMK64.png

Boos (named Ghost Bonuses on one occasion[19]) are items as well as background elements of Banshee Boardwalk and Rainbow Road in Mario Kart 64. Boos can be obtained by racers in one of the top two positions. When used, a Boo makes the user both invisible and invincible temporarily as it selects an opponent to steal an item from, unless the racers have no items. A player character affected by a Boo can pass any items, course obstacles, and racers by going through them.

Mario Kart: Super Circuit[edit]

Boo
Artwork from Mario Kart: Super Circuit

Boos, also named "ghosts",[20] are items, background characters in Boo Lake, and obstacles in Broken Pier in Mario Kart: Super Circuit. When used as an item, the Boo makes the user invisible for about five seconds and slows down the leading racer. A CPU can now use a Boo to potentially steal the player's item and coins. The transparency effect lasts for five seconds. The Boos in Boo Lake hold candles to guide player characters, while the Boos on Broken Pier take the coins

Mario Kart: Double Dash!![edit]

Boos make a cameo in Mario Kart: Double Dash!!. They are visible in portraits within the battle course Luigi's Mansion. King Boo has a much larger role, being a playable character.

Mario Kart Arcade GP subseries[edit]

Boo from Mario Kart Arcade GP DX
Boo item from Mario Kart Arcade GP DX

Boos are items in Mario Kart Arcade GP, Mario Kart Arcade GP 2, and Mario Kart Arcade GP DX. A Boo slows whomever it hits temporarily. The item has a variation titled Triple Boo.

Mario Kart DS[edit]

Boos, named Boo Hoo in British English,[21] are items, background characters in N64 Banshee Boardwalk, and cameo in portraits in Luigi's Mansion in Mario Kart DS. When used, a Boo makes the user partly invisible while stealing an item from the nearest racer. Using a Boo item does not slow the user while on offroad surfaces. Boos are obtainable by racers between 3rd to 7th place. The Boos in N64 Banshee Boardwalk only let out a laugh as a player character drives by.

Mario Kart Wii[edit]

Boos are background characters in the course SNES Ghost Valley 2 and cameo in Bowser's Castle in Mario Kart Wii. In the former, they only laugh as racers drive by before disappearing eventually, while in the latter, artwork of Boo and Dry Bones from Mario Party 7 is shown. King Boo has a much larger role again as a playable character.

Mario Kart 7[edit]

Boos are background characters of the course DS Luigi's Mansion and spectators on Toad Circuit and N64 Luigi Raceway in Mario Kart 7. The Boo portraits in DS Luigi's Mansion replace every portrait ghost portrait, and they push against their paintings as player characters drive nearby.

Mario Kart 8 / Mario Kart 8 Deluxe[edit]

A Hammer Knight in Mario Kart 8 Deluxe.
A Boo inside a Hammer Knight from Mario Kart 8
Screenshot of Mario Kart 8 Deluxe.
Luigi holding a Boo from Mario Kart 8 Deluxe

Boos are obstacles in the course Twisted Mansion in Mario Kart 8 and Mario Kart 8 Deluxe as well as items in the latter. The Boos near the gliding section of Twisted Mansion can be landed on, and the course also has Hammer Knights towards the end. Boos also float around in GCN Luigi's Mansion in Mario Kart 8 Deluxe and GBA Boo Lake in the Mario Kart 8 Deluxe – Booster Course Pass, replacing candle Boos from the original iteration in the latter course.

As items, Boos steal an item from a random opponent in front of the user, even if they are under invincibility effects. They can no longer be used to take off-road shortcuts. If there is no item to steal, the Boo gives the user a Mushroom. Only one Boo can be used on a course at once, excluding if an opponent is still under invisibility effects. A Boo can steal any timed or multiple usage item, except for a Crazy Eight, Piranha Plant, or Bullet Bill, and the duration or usage is not carried over to the player character.[22]

Mario Kart Tour[edit]

A Wooden cutout of two Boos in Mario Kart Tour.
A wooden cutout of two Boos in Mario Kart Tour

Boos are non-playable characters in Mario Kart Tour. They are encountered in SNES Ghost Valley 1, SNES Ghost Valley 2, GBA Boo Lake, DS Luigi's Mansion, and RMX Ghost Valley 1, behaving identically as before. Wooden cutouts of Boos also appear in the Ghost Valley courses and DS Luigi's Mansion. In every Halloween Tour since 2020, the 2021 Autumn Tour and the Battle Tour, Jack-o'-lanterns are scattered throughout the courses, some of which had Boo faces. King Boo returns as a playable character. A glider known as the Boo Masks, based on Boos, is the signature glider of Peach (Yukata).

Mario Kart Live: Home Circuit[edit]

Boos are obstacles in the course Boo Fortress in Mario Kart Live: Home Circuit. They frighten any player who hits them.

Yoshi's Cookie[edit]

Boos are opponents in Yoshi's Cookie. They are one of the opponents ranked on the easy difficulty. Eeries and Fishin' Boos both return.

Super Mario Adventures[edit]

Boos are antagonists in Super Mario Adventures. A horde of them attack Mario and Luigi after the two are tricked into entering a haunted house. The Boos and a Big Boo trap the Mario Bros. but are held at bay from being stared at. The Boos continue going after a nearly exhausted Mario as he drags Luigi. The Boos and Big Boo find Mario dressed as a psychiatrist with Luigi as his nurse after barging in. The Boos and the Big Boo are reformed by Mario and Luigi after some discussion, and it is revealed that the Boos were mean since they were bullied. The Boos and Big Boo lastly lead Mario, Luigi, and Yoshi out of the haunted house, waving goodbye to them. Boos are also present during Toadstool's wedding.

Super Mario Bros. film[edit]

While Boos do not physically appear in the 1993 Super Mario Bros. film, a sign saying "NOW PLAYING BOO DIDLEY"[sic] can be seen in Dinohattan.

Yoshi's Safari[edit]

Big Boo in Yoshi's Safari
A Big Boo from Yoshi's Safari

Boos[23] (misnamed "Big Boo" in the English manual[24]) are enemies in Yoshi's Safari, where they are encountered only in Ghost Mansion. Unlike most enemies in the game that can be shot with the Super Scope to be defeated, shooting a Boo stops it in its tracks. While stunned, Yoshi can then run into it to defeat it. Defeating a Boo adds 500 points to the player's score (1,000 in Hard Mode), the highest amount of points earned from regular enemies. A Big Boo serves as the boss for the level.

Mario Bros. series[edit]

Mario Bros.[edit]

A Boo in the Super Mario All-Stars Battle Game

Boos are enemies in the Battle Game of the Super Mario All-Stars's Super Mario Bros. 3 remake. They replace fireballs.

Mario Clash[edit]

Artwork of a Big Boo from Mario Clash
Artwork from Mario Clash

Boos[25] (misnamed "Big Boo" in the English manual[26]) are enemies in Mario Clash. Boos can become transparent and therefore invulnerable, but while opaque, Boos are vulnerable to being defeated by a Turtle Shell. Boos are referred to by feminine pronouns in localized manuals.[26]

Hotel Mario[edit]

Boo Buddy
A Boo from Hotel Mario

Boo Buddies[27] are enemies in Hotel Mario. Besides behaving similarly as in the platforming games, Boos wander diagonally while the player character is in an elevator. Some other Boos are normally transparent and wander in a similar manner, regardless of where the player character is looking, and sometimes become visible and quickly charge at him.

Mario's Picross[edit]

Boo Diddly is one of the pictures in the "Early Picross" stage in level 6C in Mario's Picross.

Yoshi's Island series[edit]

Artwork of Bigger Boo from Super Mario World 2: Yoshi's Island
Boos in Super Mario World 2: Yoshi's Island have smaller eyes and thinner eyebrows compared to its contemporary depictions, as well as bottom fangs. This design is later used in the first three installments in the Paper Mario series.

Boos are enemies in Super Mario World 2: Yoshi's Island and its port. They are first encountered in World 2. Boos can be defeated only by looking away and making an egg bounce off of a wall after it is thrown, hitting the ghost in the face. Kamek turns one Big Boo into Bigger Boo, which serves as a mini boss and grows in size every time he is hit by an egg. The game introduces two variants: Boo Balloons, which yield items when they pop, and Boo Man Bluffs, blindfolded Boos that rely to noise to locate the player character.

Boos appear in both sequels, Yoshi's Island DS and Yoshi's New Island, behaving identically as in Super Mario World 2: Yoshi's Island and being able to be defeated in the same way as before. In Yoshi's Island DS, there is also a Boo-like midboss in Hector the Reflector. Boos in Yoshi's New Island first appear in Beware the Boo Brigade and retain their laugh from Super Mario 64.

Super Mario RPG: Legend of the Seven Stars[edit]

Official artwork of The Big Boo from Super Mario RPG: Legend of the Seven Stars
Artwork from Super Mario RPG: Legend of the Seven Stars

Boos return during the events of Super Mario RPG: Legend of the Seven Stars and its remake. In the original game, the English translation erroneously calls them "The Big Boo", whereas the remake simply calls them Boos. In the Japanese version, they are, in fact, referred to as Teresa as they are in other games. These Boos, like other Boos that appear in previous games, hide behind their arms when stared at. However, some Boos teleport around the room, attempting to scare Mario and his friends. Boos live in Kero Sewers along with many other ghouls, including Hobgoblins and Shadows. Often, these three undead monsters will assist each other in battle. Boos have no physical defense, making them extremely weak enemies (for reference, a Goomba is the weakest enemy encountered and it has three defense points). However, Boos make up for their lack of defense with high evasion, meaning that most attacks against Boos will miss. In battle, Boos command powerful lightning magic, including the attacks Lightning Orb and Bolt. Boos also know the special attack Scream, which cuts a party member's attack and defense in half. When not using magic, Boos approach one of Mario's party members and make a face, damaging that character. In this game, there is also a stronger Boo variation called High Boos, which are the same size as their normal counterparts but have blue tongues, similar to the first appearance of King Boo. The only true appearance of a Big Boo in this game is the one used in Bowser's Terrorize attack.[28] One Boo lives in Monstro Town as part of the Three Musty Fears.

Super Mario-kun[edit]

Boo. Page 138, volume 8 of Super Mario-kun.
Boo as it appears in Super Mario-kun

Boos appear in some of the Super Mario-kun comics. A Boo appears on the cover of volume 16, which is based on Super Mario 64. Alongside it, Eyerok, a Bob-omb, and Bowser can be seen. Throughout the comic, they appear, too. Their role in the comic is similar to their role in the game, where they are enemies to Mario and attempt to attack him. Lady Bow, a notable Boo, appears in a couple of the Paper Mario-based issues. These issues are 25 and 27. Lady Bow appears on the cover of the twenty-fifth issue along with many of Mario's other partners, including Goombario, Kooper, Eldstar, and Twink. Besides appearing on the cover, she appears throughout the comic. Her role in the comic mimics her role in the game. Lady Bow reappears on the cover of the twenty-seventh issue and in the comic. Like in issue 25, Lady Bow's role in the comic is similar to her appearance in the game, where she helps Mario. In a Super Mario Galaxy-based issue, Boo Mario appears on the cover along with more of Mario's transformations.

Mario Net Quest[edit]

In Mario Net Quest, a Boo using its Super Mario 64 design is one of the obstacles that can pop out of the floor tiles. It is the strongest enemy in the game, making the player lose 1500 points if they click on it.

Yoshi's Story[edit]

Boo
A Boo in Yoshi's Story

Boos appear in Yoshi's Story. They are encountered in the stage Ghost Castle. Boos do not act differently, although they are slightly bigger. Several other Boos variants are encountered in the level, including Block Boo, Blindfold Boo, and Little Boos. Two variations are encountered earlier on in Jelly Pipe, including Jelly Ghosts and Big & Little Boos.

The normal Boo[29] is mistakenly called a Big Boo[30] in the Nintendo Power guide.

Game & Watch Gallery series[edit]

Game & Watch Gallery 2[edit]

Boo Buddies are enemies in the Modern version of Vermin in Game & Watch Gallery 2. They are encountered either in groups of two or just one. Boo Buddies do not move when looked at.

Game & Watch Gallery 4[edit]

Boo

Boos are enemies in the Modern versions of Donkey Kong 3 and Mario's Cement Factory, as well as the boxing glove of Big Boo in the Modern Boxing, in Game & Watch Gallery 4. The Boo in Donkey Kong 3 slowly approaches Mario or Donkey Kong while their backs are turned, scaring the latter to earn the player points, or scaring the former to give the player a miss. Boos in the Modern Mario's Cement Factory fly into the two containers on the second floor, clogging them up.

Mario Party series[edit]

Boo has been a major character in the Mario Party series, from being a thief for hire to being a playable character.

Mario Party[edit]

The minigame Crazy Cutter.
Players cutting out Boos in Crazy Cutter from Mario Party

Boos are non-playable characters in Mario Party. They are encountered in the minigames Pedal Power and Running of the Bulb, and are a shape featured in Crazy Cutter. Boos are on every board map except Peach's Birthday Cake, and they provide the player character with the option stealing either a number of coins from an opponent for free or a Star for 50 coins, on their behalf. A Boo is one of the characters to congratulate the victor at the end of Luigi's Engine Room. A Boo voice can be mimicked by a Talking Parrot.

Mario Party 2[edit]

Boos return in Mario Party 2. On boards, they function similarly as before. Their role is also integrated into the Boo Bell item, which summons a Boo. Boo now charges five coins for stealing coins, of which it can take up to thirty of. If the Boo tries to steal Coins, the opponent can fight it off by pressing the A button quickly. Additionally, the Boo can only steal a maximum of 30 coins or a maximum of one Star. A Boo appears in the minigame Skateboard Scamper, going after the player characters, and in Day at the Races as one of the competitors.

Mario Party 3[edit]

Curtain Call: A group of characters being tasked on memorizing the position of the dancing creatures onstage. From Mario Party 3.
Boos in Curtain Call from Mario Party 3

Boos are non-playable characters in Mario Party 3. One is partnered with Yoshi by default in Duel Mode Partners; it counterattacks an opponent (except Thwomps) to deliver equal damage, and does this to Chain Chomp only if it is directly in front. Boos are features on every board, behaving identically as in the previous two games. They are part of the returning Boo Bell item once more. Boos appear in the minigames Curtain Call, Stacked Deck, Three Door Monty, and Crowd Cover; two portraits of a Boo appear in Locked Out. Boos have a unique role in Waluigi's Island, where they present two paths to the player character upon being encountered: one of them is rigged and leads to the start, while the other allows the player character to continue along.

Mario Party 4[edit]

"Sorcerer" Boo
The sorcerer Boo from Mario Party 4

Boos are represented as characters and species in Mario Party 4. In both cases, this is the first game to give them a design that they retained in most appearances since. One of the Boos is the host of Boo's Haunted Bash, as well as the fourth host of the Reversal of Fortune. A different Boo is playable in Beach Volley Folly. Boos appear in Long Claw of the Law, possibly as characters to obtain. The host of Boo's Haunted Bash wears a wizard's hat and cape. Other Boos appear in Boo's Haunted Bash: one owns the Item Shop; another owns the Mystery Train, giving rides to the Boneyard if a Red Boo is not in its presence; one has the player character press one of the keys of the Horn of Plenty to get one of three randomly chosen items; and one has to press the correct key at the right time until the end of the side game to get a certain amount of Coins. Boos appear on every board, stealing coins and Stars for the player at the Boo House similarly to previous entries of the Mario Party series.

Mario Party 5[edit]

Boo is a playable character in Mario Party 5. It is partnered with Koopa Kid by default. Boo's previous role on the boards is fulfilled by Chain Chomp.

Mario Party 6[edit]

Boo is a playable character in Mario Party 6. Because of this, Red Boos take the role of the Boo species, even taking their role in Towering Treetop and Castaway Bay at nighttime by allowing player characters to steal coins and stars from opponents.

Mario Party Advance[edit]

“Ee hee hee! It's ghastly news!”
Boo, Mario Party Advance
Boos in the Horror Condo in Mario Party Advance

Boos are non-playable characters in Mario Party Advance. Four of them haunt Boo Cemetery. They mention a crime when Shroomlock appears to assist them, shortly after the player's arrival. At the mention of a theft, the Boos worriedly ask for help to find the golden Boo statue, which they consider a symbol of their friendship. The Boos find that there are four of them instead of the usual three.[31][32] When the Boo with a slightly moveset and rhythm is selected by the player, the false Boo is revealed to be Koopa Kid, who escapes, leaving behind the statue, and the Boos give the player the Predictotron as a reward. The Boos are said to haunt Horror Condo regularly in the epilogue.

Boos appear in the minigames Boo-Bye, alongside Red Boos and Blue Boos; Spooky Spike, serving volleyballs to the player character; and Floor It!, as possible passengers to take to the appropriate floor. The Porta-Gust Gaddget involves sucking Boos into a vacuum.

Mario Party 7[edit]

Boo is a playable character in Mario Party 7. He is partnered with Dry Bones. Red Boos have similar roles as in Mario Party 6 since Boo is playable. Boo's special orb, shared with Dry Bones, is the Magic Orb, which doubles their dice roll and grants temporary invisibility and invulnerability to traps for the next two turns.

Mario Party 8[edit]

Boo is a playable character in Mario Party 8. He has Dry Bones as a partner again. Red Boos take the role of the Boo species once more. King Boo hosts one of the boards, King Boo's Haunted Hideaway.

Mario Party DS[edit]

Boos are non-playable characters featured in the minigames Boo Tag and Peek-a-Boo in Mario Party DS. A Boo tags a player character in Boo Tag, and player characters try to pass it over to opponents, since the character tagged for the least amount of time is the winner. A variety of Boos appear in Peek-a-Boo, wearing different hats and appearing in a variety of colors like red, blue, green, and yellow. Teams compete to find more wanted Boos more than the opposing side.

Mario Party 9[edit]

Boos are featured in the board Boo's Horror Castle and in the boss minigame King Boo's Puzzle Attack in Mario Party 9. There are Boo portraits in Boo's Horror Castle from which a Boo emerges when passed, following behind the player characters by three spaces after each turn. If a Boo is on the same space as the captain, they lose half of their Mini Stars. Boos are sent out by King Boo in King Boo's Puzzle Attack when he has lost at least half of his health. Only one Boo is present at a time, and it stuns the cursor of a player character on contact.

Mario Party: Island Tour[edit]

Artwork of Boo with a Dash Mushroom, from Mario Party: Island Tour.
Boo from Mario Party: Island Tour

Boo is a playable character in Mario Party: Island Tour. It holds up a Mushroom in its artwork.

Mario Party 10[edit]

Boss minigame from Mario Party 10; King Boo's Tricky Tiles.
Boss minigame King Boo's Tricky Tiles from Mario Party 10

Boos are non-playable characters in Mario Party 10. A Boo appears in the board Haunted Trail, where by landing on a certain area, Boo comes to steal five Mini Stars from a player character with every turn until it either passed to a different opponent from a Boo Space or driven towards a Streetlight. Boos appear in the minigames Boo Burglars, as enemies to examine, and Balloon Blast Bash, in the form of a balloon. Several Boos are in the background of Luigi Board.

Mario Party: Star Rush[edit]

Using an amiibo in Boo's Block Party from Mario Party: Star Rush
Boo's Block Party from Mario Party: Star Rush

Boos are non-playable characters in mode Boo's Block Party and in the minigames Haunted Hallways and House of Boos in Mario Party: Star Rush. When a Boo amiibo is used in Boo's Block Party, four Boos are displayed in the background, two on each screen. Boo can be used in the Mario Shuffle mode if its amiibo is scanned.

Mario Party: The Top 100[edit]

Boos are non-playable characters in the returning minigames Slot Trot and Jigsaw Jumble and part of the Boo Bell item in Minigame Match in Mario Party: The Top 100.

Super Mario Party[edit]

Boo is a playable character in Super Mario Party. Its Boo Dice Block consists of two of each -2 coins, 5, and 7.

Mario Party Superstars[edit]

Boos are non-playable characters in every board and in the minigames Roll Call and Crazy Cutters in Mario Party Superstars. In boards, Boos steal either coins or stars from an opponent, like in the first three entries of the Mario Party series.

Super Mario Party Jamboree [edit]

This section is referring to a subject in an upcoming or recently released game. When the game is released, or more information about this subject is found, this section may need major rewriting.
This notice should be removed after a month has passed since the game was first released.

In Super Mario Party Jamboree, Boo returns as a playable character and a board element, retaining the latter's function from Mario Party Superstars. This is the first game that Boo appears in a playable and non-playable capacity, unlike other games that used other characters for stealing functionalities. If the playable Boo meets the non-playable Boo, the latter will say "Wah! It's like looking into a mirror..."[33]

Mario Golf series[edit]

Toadstool Tour character
Boo
Boo from Mario Golf: Toadstool Tour.
Drive 208 yards
Star Drive 253 yards
Trajectory Slice
Height 3/5
Impact 13/21
Star Impact 09/21
Control 10/21
Spin 08/21

Mario Golf[edit]

Boos are supporting characters in the Nintendo 64 version of Mario Golf. They indicate the wind direction in relation to the camera angle. "Boo" is one of the names that can appear on the scoreboard. A Boo is the basis of the design of hole 2 of Mario's Star. Boos are depicted in artwork associated with Boo Valley.

Mario Golf: Toadstool Tour[edit]

Boo is an unlockable playable character in Mario Golf: Toadstool Tour. Besides this, a Boo indicates the wind direction like before. Boos are obstacles in Bowser Badlands, affecting the trajectory of balls hit through them. Two Boos carry a sign and float across the screen slowly if the player delays with their swing; the signs usually describe gameplay tips, but some are taunts.

Mario Golf: World Tour[edit]

Boo recieving a Hole-in-One in Mario Golf: World Tour.
Boo getting a Hole-in-One in Mario Golf: World Tour

Boo is a playable character in Mario Golf: World Tour. The wind direction and speed is represented by a blowing cloud instead of a Boo. Boos and King Boo are seen floating in the sky in Hole 4 of Bowser's Castle.

Mario Golf: Super Rush[edit]

Boo is a playable character in Mario Golf: Super Rush. Boo is billed a Spin character, having a higher spin stat than the other characters. Its Special Shot is Mischief Twister, which involves several Boos embedding themselves into Boo's golf ball before it swings and later haunting any other balls nearby to force a curved trajectory in their shot gauge. Boo's Special Dash is the Carousel Dash, in which it is circled and carried forward by Boo Buddies. Boo is not penalized for crossing bodies of water or lava, since it can float, but it does deplete the stamina gauge. Boo appears in Golf Adventure mode as part of the rookie class with the player’s Mii, Toadette, and Chargin’ Chuck. Boo has an variation with a visor available that is unlocked for playing in Ranked Match.

Mario Tennis series[edit]

Mario Tennis[edit]

Artwork from Mario Tennis, the first playable role of Boo

Boo is a playable character in the Nintendo 64 version of Mario Tennis. He is billed a tricky character, like with Paratroopa. The handheld version includes a Boo in the Boo Blast minigame instead, where the goal is to hit Boos, and Boos appear in the audience at Peach's Castle.

Mario Power Tennis[edit]

Boo is also playable in Mario Power Tennis, which also provides it a different voice. When he wins a championship, Mario and Luigi would come out with the trophy and Boo would be missing. They look around and the trophy would start to float. Boo then appears under it to Luigi's relief as Mario laughs in amusement. The Mario Bros. themselves are then surrounded and levitated by multiple other Boos as the main Boo flies up to the screen and holds the trophy. Boo's taunt is to wave his racket while laughing. Boo's offensive power shot is the Boo Blast and defensive power shot is the Boo Brigade Return.

Mario Tennis Open / Mario Tennis: Ultra Smash[edit]

Boo is a playable character in Mario Tennis Open and Mario Tennis: Ultra Smash, both billing it a Tricky character.

Mario Tennis Aces[edit]

Boo from Mario Tennis Aces

Boo is a playable character in Mario Tennis Aces. It is billed a Tricky character. There is a co-op challenge titled "Boo Hunt," which can be played to unlock alternate blue, green, and purple visor costumes for Boo, costing 2,500, 10,000, and 20,000 coins, respectively. The challenge involves hitting Boos for coins.

Paper Mario series[edit]

Boos appear in every game in the Paper Mario series, where they are usually found in ghost houses. In the first three Paper Mario games, the Boos appear with a design similar to Bigger Boo from Super Mario World 2: Yoshi's Island. In the latter three games, they use their modern appearance from Mario Party 4 and onward.

Paper Mario[edit]

“I want to hear people shriek and watch them run away yelling! That's what makes Boos happy.”
Boo, Paper Mario
Boos form a rotary circle. One of them holds Record. Another asks Mario to guess who's holding it.
Boos in Boo's Mansion from Paper Mario
Two kinds of Boos from Paper Mario
Two kinds of Boos from Paper Mario
Two kinds of Boos from Paper Mario

Boos appear in Paper Mario as friendly but tricky characters. White Boos live in Boo's Mansion, and tan Boos live at Gusty Gulch. Their leader is Lady Bow, who lives in Boo's Mansion along with Bootler.

At first, Boos were being eaten by Tubba Blubba. Some Boos tried attacking the monster to save their friends, but they failed because of Tubba Blubba's "Invincibility". Seeking help from Mario, they captured Skolar, the Star Spirit Mario was trying to save, in order to have Mario help them.

In the game, when Mario arrives at Boo's Mansion, Bootler tells him to get to the third floor. The Boos have prepared some puzzles for him under the order of Lady Bow to test him. One puzzle is for Boos to form a rotary circle, throw an item several times and ask Mario to guess who is holding the item. The first time he opens a door a big Boo appears on the screen. In the eastern room of the second floor Boos holding a Record play this trick. In the western room of the second floor, a Boo is guarding a chest box with a Weight in it. Mario plays the Record to lure the Boo away and uses the Weight on the droplight of the mansion to open the western door on the first floor. Boos in the basement hide in a big chest box in the basement. When Mario opens the chest box, they play the puzzle with Super Boots. After Mario gets them, he is able to get Boo's Portrait with which he is able to get to the third floor. There, Lady Bow asks Mario to help the Boos to defeat Tubba Blubba as a condition to free Skolar, and joins Mario's party to assist him.

A Boo by the name of Igor also has a shop in the basement, but he will not sell until after Lady Bow joins the party.

In addition, a Boo appears after Mario gets the Super Boots, and tells him how to get the Star Pieces underground. Additionally, some Boos are flying in the sky who can be seen out of the windows. When Mario is about to set off, two white Boos appear to open the gate to Gusty Gulch under the command of Bow.

In Gusty Gulch, upon Tubba Blubba's arrival, the Boos hide except for Stanley, who is too late and gets caught and eaten by Tubba Blubba.

In the basement of Tubba Blubba's Castle, a brown Boo tells Mario not to fight Tubba Blubba until he finds his weak point. According to his word, he sneaked into the castle to look for the weak point. After Mario gets Yakkey, some tan Boos appear in front of Tubba Blubba's Castle and, seeing Mario and Bow get out and Tubba Blubba chasing, help the team by blocking the door.

After Tubba Blubba is defeated, the Boos he has eaten are saved, and Bootler releases Skolar as promised. Boos rejoice, and the background music in Boo's Mansion is replaced with a cheerful one. The Boos at Gusty Gulch write Lady Bow an admiration letter, which the player can read at the Toad Town Post Office. They also begin to talk about a female Boo called Victoria.

After Mario defeats Bowser, two Boos come to Peach's Castle to see the party, one white and one brown. The white one says he comes to see Lady Bow in her finery. He thinks that Bow is prettier than Princess Peach. The brown one says that he is going to have a wedding ceremony after the party. In the end-of-game parade, three white Boos along with Bootler are carrying Tubba Blubba's body.

Paper Mario: The Thousand-Year Door[edit]

Boo

Boos return in Paper Mario: The Thousand-Year Door and its Nintendo Switch remake as friendly characters as well as enemies for the first time in the series. Some Boos such as Lahla and Peeka in Rogueport can be seen running shops and various casino games. Enemy Boos are found in Creepy Steeple and levels 21-29 of the Pit of 100 Trials. When Mario first enters the steeple there is only one Boo in the room who says that he misses his friends. He will let Mario through only one door (blocking him from using any other doors), where he finds a chest. When he opens it, 200 Boos fly out. The last Boo asks Mario "How many Boos came out of that chest?" If Mario answers correctly the Boo will give him an Ultra Shroom. If Mario is wrong the Boo will give him one coin. Upon returning to the main room, the first Boo is still there. He asks if Mario is going to be mean to him. If Mario answers "No", a bunch of Boos (the same ones from the treasure chest) will start flying around the main room, attempting to swarm Mario. If successful, they will throw Mario out of the Steeple, exactly like the Sentinels in Tubba Blubba's Castle. If Mario Spin Attacks them several times, they merge into an Atomic Boo. Once the Atomic Boo is defeated (releasing a Lucky Start badge), Mario can fight Boos in other parts of the Steeple. Even before defeating the Atomic Boo, Boos can still be found, but only when accompanying Swoopers.

The original Creepy Steeple Boo sends an e-mail to Mario that thanks him for freeing his friends, despite the fact that they attacked him. He signs the letter "The Creepy Steeple Boo". More Boos can be found in the Pit of 100 Trials. In this game, Boos attack by becoming invisible and getting close to Mario or the partner, then becoming visible and making a glare at them, causing 3 damage. However, if Mario or his allies gets lucky in battle, the Boo who tried to attack Mario and his partner will be tired out. The game also introduces a more powerful sub-species, the Dark Boo, which can be found in Poshley Sanctum.

Boos can also appear as members of the audience, where they can throw items onto the stage and randomly turn a character in the battle invisible for one turn.

In the remake, the Boos use their modern voice clips. Additionally, the Creepy Steeple Boo can be later found in the hidden room containing the Cookbook. When spoken to, he will quiz Mario again with three questions about various parts of the game, and will reward Mario with an item if the latter answers all three questions correctly. This can be done multiple times, each with its own trio of questions.

Field Tattle[edit]

Outside of battle, Goombella can use Tattle only on a Boo found in the foyer of Creepy Steeple after Mario releases the 200 Boos.

  • "That's a Boo. You think it's one of the Boos from that box?"

Super Paper Mario[edit]

Boos in the minigame Mansion Patrol in the Flipside Arcade from Super Paper Mario

Boos return as enemies in Super Paper Mario. In this game, they turn invisible if Mario looks at them, but they turn visible and chase him if he is not looking at them, similar to their behavior in Super Mario 64. To defeat them, the player must approach them from the back and then attack them. Additionally, the Flipside Arcade houses a Boo themed shooting game, Mansion Patrol. This game has the player shooting Boos, including Dark Boos and occasionally Atomic Boos, to score points. A Toad frequently appears to give power-ups, as long as the player saves him from his Boo captor. Lady Bow also makes three cameos in this game.

Paper Mario: Sticker Star[edit]

A Boo

Boos reappear in Paper Mario: Sticker Star. They only appear in World 4-3: The Enigmansion. Mario must use the Book of Sealing, given by a Toad, to seal away every Boo that has escaped. In battle, Boos can make themselves disappear and can slap Mario or they can go up to Mario and scare him by making a scary face. They are able to make Mario dizzy in this game with their scare attack preventing him from using any of his defensive/dodging stickers. The attack is determined by the sound the Boo makes when it disappears.

Among the normal Boos, there is one golden Boo that drops several Coins after Mario defeats it, which can be found in the safe. This Boo attacks exactly like the normal ones. Another notable Boo is one that is crumpled, which is found in a trash can. In battle, it only has 1 HP and cannot attack. Additionally, a group of eighty-two Boos called a Boo Stack also appears. Once all the Boos get returned to the book and it is placed in its rightful spot, Kamek appears and turns all the captured Boos into the mini boss, Big Boo. After defeating the mini-boss, the Boos are put to rest once again and the mansion is restored to its former state. Boos can no longer be fought at this point.

Paper Mario: Color Splash[edit]

Boo 10-Stack Idle Animation from Paper Mario: Color Splash
A Boo 10-Stack from Paper Mario: Color Splash

Boos return in Paper Mario: Color Splash as enemies who can be fought within the parallel world at Vortex Island, Lighthouse Island and Fortune Island. By the time they are first encountered, Mario can instantly defeat them with a hammer First Strike without entering a battle. In battle, they attack by either hitting Mario or scaring him. They can disappear while in battle, causing all attacks to miss until they reappear. Outside of battle, if one is stared at too long, it will disappear, and then reappear behind Mario. A Boo appears as an NPC in Redpepper Crater, where it is in a hot spring. A Boo 10-Stack variant also appears.

Paper Mario: The Origami King[edit]

An origami Boo from Paper Mario: The Origami King.
An origami Boo as seen in Paper Mario: The Origami King
A Paper Macho Boo from Paper Mario: The Origami King.
A Paper Macho Boo

Origami Boos appear as enemies in Paper Mario: The Origami King, first encountered in the Scorching Sandpaper Desert, but only at night; after Mario has explored the Temple of Shrooms and put the sun back in the sky, they are replaced by Koopa Paratroopas. In battle, Boos will turn invisible right before Mario manipulates the arena, forcing him to memorize their positions. However, they will reveal themselves if they are hit by a Toad's thrown object or shortly before time runs out. In addition, much larger Paper Macho Boos appear in the desert at night, replaced by Paper Macho Koopa Paratroopas by day. A Paper Macho Boo is also featured as one of the seven opponents on Scuffle Island.

Luigi's Mansion series[edit]

Luigi's Mansion[edit]

Main article: List of Boos in Luigi's Mansion
Boo
A Boo in Luigi's Mansion

Boos are enemies in Luigi's Mansion and its remake. This is the first appearance of King Boo, the main antagonist as well as leader of the 50 Boos; of the Boos, 15 of them are smaller ones that make up the portrait ghost Boolossus. Boos appear in rooms even while the lights are on, unlike with other ghosts. When a Boo is attacked, it usually flees, but some twirl into Luigi to cause damage.

Luigi's Mansion: Dark Moon[edit]

Main article: List of Boos in Luigi's Mansion: Dark Moon

Boos are enemies in Luigi's Mansion: Dark Moon. There are a total of 32 Boos, all serving King Boo, who returns as the main antagonist; ten of the Boos merge into the Big Boo fought in the Treacherous Mansion. The regular Boos all have names that play on "Boo," like in the previous game. Every mission has a Boo hidden in an invisible object that can be revealed only from using the Dark-Light Device. Once all five Boos are caught in a mansion, a bonus mission for it is unlocked. Boos can create Spirit Balls, which make objects invisible, and appear from certain ones only after Luigi has vacuumed all of them in. A Boo is captured by pulling back on its tongue using the Poltergust 5000 and releasing it by pressing A Button, damaging the Boo as it bounces around the room. When it reaches 0 HP, the Boo can be forced into the Poltergust 5000 when attached to the nozzle and shoved inside by Luigi. All captured Boos are located in the Boo Canister in the Vault, each being sent down there after Luigi returns to the Bunker from a mission.

Luigi's Mansion 3[edit]

Main article: List of Boos in Luigi's Mansion 3
Artwork of a Boo from Luigi's Mansion 3
A Boo in Luigi's Mansion 3

Boos are enemies in Luigi's Mansion 3. Like in previous entries, their names often include "Boo" in it. King Boo returns as the main antagonist. There is a Boo to catch on every floor except the Master Suite, and a Boo appears on a floor randomly once Luigi has retrieved the elevator button of that floor. Whenever a Boo is in the room next the player characters, Gooigi vibrates, as well as the player's controller. One Boo can be located with each Boo Finder. The music is different in a room with a Boo, which is in the object that vibrates the strongest. The Boo launches a swarm of bats at Luigi if he uncovers the wrong object before fleeing into a different room. A Boo attacks by either spinning towards Luigi to deduct 20 HP or by throwing a bomb at him. When revealed, the Boo has to be caught before Luigi can leave the room. Boos are caught the same way as in Luigi's Mansion: Dark Moon, though every Boo now has 20 HP.

Super Smash Bros. series[edit]

SmashWiki article: Boo

In the Super Smash Bros. series, Boos mostly appear in the form of collectible items. In Super Smash Bros. Melee, a Boo appears as a collectible trophy. In Super Smash Bros. Brawl, there is another trophy of Boo, as well as a sticker depicting its artwork from Mario Tennis. In both Super Smash Bros. for Nintendo 3DS and Super Smash Bros. for Wii U, Boos once again received their own collectible trophy; furthermore, Super Smash Bros. for Wii U gave one an item in Smash Tour, where using it allows the player to begin a battle while invincible. In Super Smash Bros. Ultimate, there is a Novice-class Neutral-type primary spirit of a Boo, using its artwork from New Super Mario Bros. U, and it can be enhanced to King Boo at level 99. In World of Light, the Boo spirit appears in the Dracula's Castle sub-world of the Dark Realm. The spirit battle takes place on the Mushroom Kingdom U stage, with an invisible grayscale Kirby as the puppet fighter.

Boos appear in the background of the Luigi's Mansion stage in Super Smash Bros. Brawl, Super Smash Bros. for Wii U, and Super Smash Bros. Ultimate. Here, they are very briefly seen flying out the mansion when a part of it is knocked down.

Mario & Luigi series[edit]

Mario & Luigi: Superstar Saga / Mario & Luigi: Superstar Saga + Bowser's Minions[edit]

A Boo chases the Mario Bros. in Mario & Luigi: Superstar Saga.

In Mario & Luigi: Superstar Saga, Boos are enemies that only appear in Bowser's Castle; they aid Bowletta along with the rest of the minions who believe her to be Bowser. Outside of battle, they hover around, attacking Mario and Luigi when they are not looking. However, they look away if Mario or Luigi make eye contact. The Boos also show the ability to teleport. In battle, a Boo has two attacks. For the first attack, the Boo will teleport in front of one of the brothers and attempt to bite him. For the second attack, it will fly up into the air and swoop into one of the Mario Bros., which can even prohibit the use of certain moves or items. The former attack can be countered with Mario or Luigi's hammer, whereas the latter can be dodged or countered by jumping. In either of these attacks, if the Boo makes a face, it will target Luigi, if it does not, it will target Mario. Boos are weak to Firebrand and Fire Bros. They also have low HP, but very high defense.

The Miner Boo's standard sprite from MLSS.

Boos wearing mining helmets and brandishing pickaxes also appear in levels 4 and 5 of Mysterious Mine Carts (levels 3 and 5 in the remake). If these Boos touch Mario, they will cause the loss of a diamond. They will slowly shrink until they disappear if the flashlight is pointed at them.

Boos appear in the main game and in Minion Quest: The Search for Bowser from Mario & Luigi: Superstar Saga + Bowser's Minions. Boos are flying troopers, and attack by ramming into enemies. Their Special Skill, Evasion Cloak, allows them to increase their evasion, depending on how filled the meter that is shown becomes. Captain Boo appears as a playable captain in the game. When a Boo appears as a captain, they are able to attack the other captain from behind, using Sneak Attack.

Boo Statue M&LSS sprite.png

There are also Boo Statues which become invisible and cannot be interacted with when looked directly at. Mario and Luigi must use the Tickle move to push them while facing backward.

Mario & Luigi: Partners in Time[edit]

Boo

During the events of Mario & Luigi: Partners in Time, Boos appear in Bowser's Castle of the past. In the field, Boos attack the same way as they did in Mario & Luigi: Superstar Saga. In battle, a Boo attacks by peeking through one of its eyes; peeking with the right eye is Mario, and with the left eye, Luigi. The Boo reappears behind the corresponding bro and charges from behind; this can be avoided or countered with a jump. Boos also appear during the battle with Sunnycide. While flipped on its back, Sunnycide can summon a Boo to attack Mario or Luigi, which can be countered with a hammer. Also, when a Handfake has a Bowser sign, a Boo or a Fly Guy carries a flame from Bowser's mouth. Dark Boos are found in the Gritzy Caves.

Mario & Luigi: Bowser's Inside Story / Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey[edit]

A Boo holding a plate
The digital Boo seen during the fight against Bowser Memory L Sprite of the digital Boo from Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey
A digital Boo.

Boos make a reappearance in Mario & Luigi: Bowser's Inside Story. They appear in Bowser's Castle, where they have been brainwashed by Fawful along with the rest of Bowser's minions once he took over the castle. When Bowser gets to have a feast as a reward for beating Midbus at the Fawful Theater show, three Boos serve him food cooked by Fawful himself. However, Bowser is tricked into eating too much food and ends up getting fat, which results in him getting stuck in the floor due to his weight. Boos reappear later in the game to help many of the brainwashed minions of Bowser push the Fawful statue against him. In addition, a Boo appears whenever Bowser gets a level up. The Boo (just like the Fishin' Lakitu in Mario's or Luigi's level up screen) holds the circle for getting a bonus upgrade for the stat of the player's choice.

An odd thing shown in the game is a Boo and Koopa Troopa in love with each other in Bowser's Castle. They not only love each other, but also love Fawful due to the brainwashing that was put on the minions.

Yikk, a ghost who appears in the same game at the Tower of Yikk, explains that he researches Boos. He even builds a machine to visualize Boo transparency waves before he passed away.

During the fight with Bowser Memory M and Bowser Memory L, Bowser Memory L has an attack that involves a digital Boo chasing him around. The Boo can be jumped on by either Mario or Luigi to stop the attack prematurely.

Sprite of the Boos in Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey.

Boos return in Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey, where they additionally are found as enemies and recruitable allies in the Bowser Jr.'s Journey mode. Their special attack is Discord, which lowers the speed of enemies.

Mario & Luigi: Dream Team[edit]

Icon for the Boo Biscuit in Mario & Luigi: Dream Team

Boos are referenced in Mario & Luigi: Dream Team. The game features an item named Boo Biscuit.

Mario & Luigi: Paper Jam[edit]

A shiny Paper Boo's battle sprite from Mario & Luigi: Paper Jam.

Boos appear in Mario & Luigi: Paper Jam in a minigame where the player has to save a Toad by running away from a Boo and avoiding firebars and bombs. Like in many other games, this Boo will stop if the Mario Bros. look at it, and will follow them if they look away. Boos can also be seen carrying Papercraft Boos, along with Papercraft King Boo. Their paper versions also appear as regular enemies in the haunted side of Gloomy Woods. King Boo also appears as a boss in Gloomy Woods. Boo Biscuits also return from Mario & Luigi: Dream Team.

Mario vs. Donkey Kong series[edit]

Mario vs. Donkey Kong[edit]

Boo
A screenshot of a Boo in Mario vs. Donkey Kong (Nintendo Switch)

Boos are enemies in Mario vs. Donkey Kong and its remake. They act similarly to their appearances in platforming games. Boos appear in both segments of Level 4-4 and in Level 4-4+ only. Boos cannot be defeated, and they grow and stick their tongue out if they defeat Mario or a Mini-Mario. The remake depicts Boos with a more toylike appearance, and Boos float towards Toad in co-op play if his back is turned away, but stop moving if looked at.[34]

Mini Mario & Friends: amiibo Challenge[edit]

Boos in their active and inactive states in Mini Mario & Friends: amiibo Challenge
Boos in their active and inactive states in Mini Mario & Friends: amiibo Challenge
Boos in their active and inactive states in Mini Mario & Friends: amiibo Challenge

Boos are enemies in Mini Mario & Friends: amiibo Challenge. They are depicted with a toylike design. Boos appear in every level of Moonlight Mansion, as well as levels Star 3 and Star 5 in the Star World. Boos float in mid-air, with some of them staying in a single position and others moving back and forth horizontally or vertically. Boos are invincible. They become harmless if they enter the light coming from a Candle, making it possible for the Minis to bypass them as the Boos stop in place and cover their eyes.

Mario Pinball Land[edit]

Boos are enemies in Mario Pinball Land. Big Boo is one of the bosses. A Boo is defeated if hit from behind, rewarding 2,000 points. A Boo becomes transparent if Mario tries to pass through it and does not take damage. Boos sometimes vanish and reappear elsewhere in the area.

Dance Dance Revolution: Mario Mix[edit]

Boos are obstacles in Dance Dance Revolution: Mario Mix. Boos try to get the player character to miss a step, blocking his next move if successful. Boos can be held back if the stepped on, unlike their gigantic counterparts.

Mario Baseball series[edit]

A Boo prepares to bat in Mario Super Sluggers.
Boo prepares to bat in Mario Super Sluggers

Boo is playable in Mario Superstar Baseball. It is on Wario's team as a starter. Boo is tied with Peach with its pitching, losing only to Bowser and Waluigi. Its special running and fielding move is a Super Jump. Its running and batting are weak, but its fielding is very poor. The only worse fielder in the game is Bowser.

Boo makes another appearance in Mario Super Sluggers. It is on Wario's team once again, and it can be unlocked in Wario City by finding it in between boxes and completing its challenge. Like its predecessor, Boo has the highest ranked pitch in the game, along with Peach (9/10). Despite its pitching being very high, its stamina is very poor, but its other stats range from average to low. Boo displays good chemistry with King Boo, Shy Guy, Magikoopa, and Blooper. It has bad chemistry with Mario, Luigi, Yoshi, Baby Mario, Baby Luigi, Baby Peach, and Baby Daisy.

There is a new item named Mini Boos that, when activated, turn the ball invisible for a short period of time. If used against a computer, the player stops moving until the Boos go away. If used when a special hit is in effect, the Boos do nothing.

Super Princess Peach[edit]

A Boo from Super Princess Peach

Boos are enemies in Super Princess Peach. Boos behave like they do in Super Mario Bros. 3. Besides the returning Big Boos and Blindfold Boos, the game introduces an angry variety, Mad Boo. King Boo also returns as a boss.

Mario and the Incredible Rescue[edit]

Cover for Mario and the Incredible Rescue
Two Boos appear on the front cover of Mario and the Incredible Rescue

Ghosts, as they are called generically, are enemies in Mario and the Incredible Rescue. Two of them are displayed on the cover, one depicting its artwork from Mario Kart: Super Circuit and the other from Luigi's Mansion. Ghosts capture Princess Peach and take her to Bowser's Castle, and Mario has a vision of six ghosts surrounding her. The ghosts are defeated eventually from a spell cast on them, sending them flying out of the castle.

Mario Hoops 3-on-3[edit]

Boo is an unlockable playable character in Mario Hoops 3-on-3. It is billed as a Tricky player. Boo's special ability is the Thriller Dunk. Boo can be unlocked by completing the Flower Tourney on hard difficulty.

Mario Strikers Charged[edit]

“This ghost can fly up and down the sidelines with great speed, using precise and accurate passing to lead his team to victory. His long-distance shots are quite weak though and his hits are not very powerful. If Boo gets a chance, he can Possess the ball and score at will.”
Description
A Boo
Boo from Mario Strikers Charged

Boos are sidekicks in Mario Strikers Charged. They wear a helmet with the logo of their team captain. Boos are classified as a playmaker, like Toads. They have Possess as their skillshot.

Mario & Sonic series[edit]

BooMASATOG.png
A sprite of a Boo from the Nintendo DS version of Mario & Sonic at the Olympic Games

In the Mario & Sonic series, Boos mainly appear in a few events, sometimes also as audience members. In the Wii version of Mario & Sonic at the Olympic Games, Boos appear as an item in Dream Race, where they temporarily follow whoever is in first place, or second if the player in the lead uses it, causing them to lose speed. It is possible for multiple Boos to follow a character at once, causing them to remain at a lower speed, but a High Speed item can remove them. In the Nintendo DS version, Boos penalize the player if they perform two consecutive fouls in the 100m, 400m or 400m Hurdles events, and in Dream Basketball, a Boo blocks one of the baskets if a Chaos Emerald is used. Both versions of Mario & Sonic at the Olympic Games include Boos as part of the audience in various events. In the Nintendo DS version of Mario & Sonic at the Olympic Winter Games, Boos are items in three events: Ski Cross Racing, where they can steal Rings and items from players ahead of the user; Extreme Snowboarding, where Boos steal items from opponents in front and deplete the energy in their trick gauge; and Ski Shooting, where Boos will simply steal an item from an opponent if they have any. In the Nintendo 3DS version of Mario & Sonic at the Rio 2016 Olympic Games, Boos appear in Archery Plus, where they carry around the targets and disappear upon being shot.

Boos appear in some of the minigames. In the Nintendo DS version of Mario & Sonic at the Olympic Games, Boos appear in two minigames: Conveyor Belt, as one of the characters needing to be sorted, and Shoot!, as one of the enemies to be hit. In Mario & Sonic at the London 2012 Olympic Games, Boos also appear in some minigames in the London Party mode, which itself has some Boos that can be spoken to play minigames and earn stickers.

King Boo in Mario & Sonic at the London 2012 Olympic Games
King Boo talking to a Boo in The Ghostly Tower

Boos have also had some of their own collectible items. In the Wii version of Mario & Sonic at the London 2012 Olympic Games, one of the unlockable Mii outfits is a jersey featuring a Boo design. In the Nintendo 3DS version of Mario & Sonic at the London 2012 Olympic Games, a badge of a Boo can be obtained from the badge machine.

In Nintendo 3DS version of Mario & Sonic at the London 2012 Olympic Games, a Boo first appears in the Story Mode trying to scare people away from the Tower of London with the Phantasmal Fog, and is then followed by Sonic and Tails who challenge the Boo and King Boo to an Olympic Event, with the Boos fleeing when they lose. A single Boo also appears at the opening ceremony. A Boo also appears in Mario's Defeat?!, in which it fails to bring Mario to the London Tennis Club but helps set up the match with a Goomba transformed to look like Mario, and later celebrates with the other minions when they notice that Bowser seems to be back to his usual self.

Mario Sports Mix[edit]

Boos are non-playable characters in Mario Sports Mix. They are encountered during Basketball and Volleyball matches in Luigi's Mansion, where Boos circle around the court. Boos make laughter sounds, especially when a player character scores.

Captain Toad: Treasure Tracker[edit]

Captain Toad flashes his headlamp on a Boo at the Bizarre Doors of Boo Mansion.
A shy Boo in Captain Toad: Treasure Tracker

Boos return in Captain Toad: Treasure Tracker and its ports. They are mostly the same as in Super Mario 3D World, but with some differences. Boos and Big Boos can be defeated quickly using either Toad's or Toadette's headlamp. Boos disappear while interacted with on the touch screen or with the pointer functionality; this does not reward any coin, unlike most enemies.

Mario Sports Superstars[edit]

A Super Rare Boo card from Mario Sports Superstars
A Super Rare Boo card from Mario Sports Superstars

Boo is a playable character in Mario Sports Superstars. He is a starter captain-type who is billed a Technique player, giving him an advantage in accuracy or horse control, except in tennis, which bills him a Tricky type. Boo's rallies curve in tennis, making the trajectory of his shots less predictable. Boo has a default drive of 213 yards and shots that travel medium-low in a draw trajectory in golf.

Mario + Rabbids series[edit]

Mario + Rabbids Kingdom Battle[edit]

A Boo in Moonlight Sonata from Mario + Rabbids Kingdom Battle

Boos are obstacles in Mario + Rabbids Kingdom Battle. They warp to certain areas during the turn transition between the heroes and enemies. If a Boo converges on a character, it will follow said character and force them to warp to a random spot on the battlefield along with the Boo. Additionally, one of Rabbid Mario's Melee weapons has a design based on a Boo, and in Spooky Trails, several Boos can be found ensnared by ghostly chains, as well as a Boo Balloon that was merged with a Rabbid and a phonograph, becoming the Phantom.

Mario + Rabbids Sparks of Hope[edit]

While no Boos appear in Mario + Rabbids Sparks of Hope, the laugh of one can be heard if the Spark Vampastra applies its Vamp Attack ability to Mario, and he uses his Dual Slingers to attack. In the Rayman in the Phantom Show DLC, Boos make cameos as the Spooky Trails banners from the first game.

Dr. Mario World[edit]

Dr. Boo artwork for Dr. Mario World
Artwork of Dr. Boo in Dr. Mario World

Boos are assistants in Dr. Mario World as of October 31, 2019. Its effect in stage mode is to fill the skill meter faster when yellow viruses are eliminated, where it fills more at higher levels. The percentage determines the number of points the skill meter fills, so for example at level 3, it fills 30% faster, meaning that for each yellow virus eliminated, an extra 0.3 points is added to the skill meter. In versus mode, its effect is to increase the speed the skill meter fills for both the user and their opponent, in which the amount of points required to fill the skill meter is reduced by the listed percentage. If both players use this assistant, the effect stacks. The resulting amount of points required to fill the skill meter is rounded down to the nearest round number.

A Boo was added as a doctor under the name Dr. Boo on September 24, 2020. His skill is represented by the Boo shielding his face, after which he shows his face and tongue. In stage mode, he immediately eliminates objects in a random 2 x 2 area, similar to Dr. Fire Rosalina's skill but it affects a smaller area. In versus mode, he eliminates objects in a 1 x 1 area at level 1, a 2 x 2 area at level 2 and a 3 x 3 area at level 3 to 5 (the skill meter fills faster at higher levels). This skill prioritizes areas that contain viruses, but if there are no more viruses, the area in which is targeted will be random as long as it contains at least one object.

Other appearances[edit]

The Legend of Zelda: Link's Awakening[edit]

Zelda Wiki article: Boo
Boos in The Legend of Zelda: Link's Awakening
Boos as they appear in the remake of The Legend of Zelda: Link's Awakening

Boos in The Legend of Zelda: Link's Awakening only appearing in a dark room in the games' second dungeon, Bottle Grotto. They actively chase Link regardless of whether he is facing them or not; if Links swings his sword at them, they disappear and reappear at a different location. After Link lights up the room, they become vulnerable and can then be defeated with Magic Powder. In the Nintendo Switch remake of the game, they now use their voice clips from the Super Mario franchise, and a Boo figure can be won from the Trendy Game after clearing the Key Cavern and placed in the Quadruples' house. The text that appears upon acquiring the figure reads, "You got a Boo figure! As spooky ghosts go, this one's pretty cute!"

Minecraft[edit]

A Boo in Minecraft: Wii U Edition
Boo as it appears in Minecraft

Additionally, in the Super Mario Mash-up in Minecraft, Ghasts are replaced by Boos.

Monopoly Gamer[edit]

Boo is a playable character in Monopoly Gamer. It is sold separately as a "Power Pack" expansion figure.

Unused appearances[edit]

Super Mario Odyssey[edit]

Boos were going to appear physically in Super Mario Odyssey, as one is seen in concept art for the game, but they were removed from the game,[35] making this game the first game in the Super Mario series to not contain Boos since Super Mario Land. However, Peach wears a Boo mask on the side of her head when she visits Bowser's Kingdom, a common way to wear masks of yōkai in festivals in Japan.

The Super Mario Bros. Movie[edit]

Boos were planned to appear in the film, as they can be seen in early concept artwork for the Dark Lands, but they were removed from the final release.[36] However, their leader, King Boo, makes an appearance during the wedding between Bowser and Peach.

General information[edit]

Physical appearance[edit]

A laughing Boo with a shy Boo
BooArtwork of Bigger Boo from Super Mario World 2: Yoshi's IslandBooBoo
(Clockwise from the top left) The Boo's Super Mario Bros. Wonder design, the Super Mario World 2: Yoshi's Island design, Super Mario Sunshine design, and Luigi's Mansion design

Though their specifics change from game to game, Boos are usually bashful, cowardly, spherical ghosts. They have black beady eyes and fangs. Although they are typically white, there are sub-species of the Boo race that appear in different colors, such as pink. From Luigi's Mansion onward, it became common to picture Boos sticking out their tongues. Boos often have wide open grinning mouths with their tongue sticking out. In most games, Boos are unable to change their facial expressions. The only exception is when they are looked at, in which case they bashfully cover their faces along with the section around their eyes blushing red or pink. However, the Luigi's Mansion and early Paper Mario games portray Boos as being more expressive than in other games, being able to frown, scowl, or even smirk. Since Super Mario 64, Boos have been portrayed with a unique, high-pitched laugh. Both this laugh and Bowser's laugh are derived from the same stock recording of a human man laughing recorded by Charles Martinet;[37] it was sped up for the Boos and slowed down for Bowser. However, Boos received a new laugh starting in Mario Power Tennis, being more of a haunting laugh than before. Although most species of Boo will cover their faces and become intangible when looked at, they will often sneak behind their victim and strike when their back is turned. Due to their ghostly abilities, Boos are generally invulnerable and cannot be harmed by ordinary means of attack. Despite this, they are not invincible and are especially vulnerable to the light. If they are exposed to a source of light, Boos are usually weakened, and in some cases, they may even be defeated. Usually, they can also have other weaknesses. Because of their intolerance to the light, Boos will often hide if they are trapped in lit rooms. However, King Boo claims that Boos cannot truly be killed. While the ghosts generally appear to be more afraid of their victims than their victim is of them, this is not always the case. Some Boos have absolutely no problem meeting their victim's gaze, and will even try to attack. Boos tend to have a taste for the fine arts, as seen in Paper Mario and Mario Party 4. In Luigi's Mansion: Dark Moon it is shown that Boos will actually save someone if only later to trick them. This is seen when Luigi watches through pipe in the Old Clockworks as a Yellow Toad balances on a ledge. Some Boos appear and watch the Toad before it falls off the ledge, which is later found to be quite a drop, the Boos show a large amount of concern and shock when this happens before diving down for the Toad. The Toad is later found in a painting because of the Boos.

Boos are often characterized by their sub-species despite their similarities in appearance and attack manner. Boo species tend to vary wildly in size, with some such as Boo Buddies being miniature, while others such as the Big Boos boast gigantic size.

In Luigi's Mansion, Professor E. Gadd notes that Boos have mysterious powers that increase when they gather together in large groups. While it is difficult to stop them, they can be weakened if one is able to defeat members of the group. Although in Luigi's Mansion: Dark Moon this does not seem to affect them or King Boo in any way suggesting that they do not always need to be in groups anymore.

Boos have few predators, their only known threat being a Spike named Tubba Blubba in Paper Mario, when he began devouring Boos. This, however, may have been his revenge for the countless times the ghosts scared him.

Color variations[edit]

Boos come in many different colors. The following is a list of all known Boos and the first appearance of the respective Boo.

Image Color First appearance
Sprite of a Boo in Mario Party Advance White Super Mario Bros. 3
Sprite of a blue Boo in Mario Party Advance Blue Super Mario World (as Big Boos)
Sprite of a red Boo in Mario Party Advance Red Super Mario Bros. Deluxe
Green Boo Green Super Mario Bros. Deluxe
BlackBoo.png Black Super Mario Bros. Deluxe
Bootler.png Chartreuse Paper Mario
Lady Bow PM2.png Mint Paper Mario
Herbert. The sprite is also shared with other Boos in Gusty Gulch Brown Paper Mario
Peeka/Lahla Light-blue Paper Mario: The Thousand-Year Door
Yellow Mario Party DS

Tools[edit]

Habitat[edit]

Boos typically make their homes in dark forests, such as Forever Forest and the Boo Woods, and tend to be most commonly found in older buildings such as mansions, castles, and Ghost Houses. Although most of them live in such dwellings, they also seem to enjoy wastelands. One of the only known Boo villages lies in Gusty Gulch.

They are typically found in groups because their fears make them find strength in big numbers.

Allegiance[edit]

Though most Boos tend to side with Bowser and King Boo, they seem to, for the most part, actually stand as neutral. For example, Boos are by now a common enemy in most side-scrolling games; however, in the Paper Mario series and now increasingly in the multiplayer games, Boos have been seen to take the side of the Mushroom Kingdom. Lady Bow, in fact, helped Mario save the kingdom in Paper Mario. In another example, the Boos in the Creepy Steeple from Paper Mario: The Thousand-Year Door attack Mario initially, but later in the game Mario is sent a friendly letter from one of them. King Boo, on the other hand, has several times been shown to wish nothing but terrible things for the heroes, but especially Luigi (although this could be accredited to Luigi being easily scared, making him a prime target for most Boo antics). They also have attacked Bowser in some games, such as the Mario Party series, mainly from Mario Party 5 to Mario Party 8.

Language[edit]

As hinted in the game Super Mario Galaxy, Boos have their own unique language called Booish. It most probably is spoken only by Boos since Mario cannot understand it. However, upon absorbing a Boo Mushroom and turning into Boo Mario, he gains the ability to read it, if not speak it as well.

Paper Mario also features Boos replacing certain words with "Boo", possibly as a part of the Booish language:

I am so bored!! Boo-ored!

Boo-st of luck!

Hey, what can I Boo for you?

It's going to be the most Boo-tiful wedding ever!

Profiles and statistics[edit]

Main article: List of Boo profiles and statistics

Mario & Luigi: Superstar Saga[edit]

Mario & Luigi: Superstar Saga enemy
Boo
MLSS Boo Idle.gif HP 10 POW 128-134 Defense 1000
Speed 110 Experience 40 (110) Coins 10 (8)
Location Bowser's Castle Jump Normal Hammer Normal
Hand Weak Fire Critical Thunder Normal
Stat down? 100% Stun? 0% Burn? 0%
Level 40 (33) Role Common Item drop 1-Up Mushroom – 6.45%
Random Slacks – 25.81% (32.26%)
Notice
  • Stats in parentheses are from the Japanese version (if they differ from the original American and European stats).
  • Stats in gray are only found in the game's coding and are not available during "normal" gameplay.

Paper Mario: Color Splash[edit]

Paper Mario: Color Splash enemy
Boo
Boo Idle Animation from Paper Mario: Color Splash HP 33 Type Normal Role Common Card
Strong None Weak None Card drop rate 3
A Boo card from Paper Mario: Color Splash
Moves Hand Attack (6), Terrify Attack (reduces paint of Mario), Vanish (removes self from battle for one turn), Group Attack (6), Blowback Attack (12)
Location(s) Vortex Island, Lighthouse Island, Fortune Island
Quotes Usual: "Quit staring!" ~ "Ahahaha!" ~ "Mind turning around for a minute?" ~ "Boo! Yeah!"
Enemy class
ENEMY_ZAKO_LV1
Dropped items
Hammer Scraps 10 Red paint 6 Yellow paint 6 Blue paint 6 Orange paint 3 Green paint 3 Purple paint 3

Super Mario RPG (Nintendo Switch)[edit]

Super Mario RPG enemy
Boo
Image of a Boo from the Nintendo Switch version of Super Mario RPG HP 43 Weak Elements N/A Drops Pure Water
Exp. 2 Weak Statuses PoisonSleepMute Rare Drops Honey Syrup
Found in Kero Sewers
Monster List profile They scream to try to debilitate their enemies with fear, but they end up startling themselves too. Their hearts are secretly always pounding.
Thought Peek "Don't look at me, I'm shy... Aaah! He's looking at meeeee!"
Animations

Gallery[edit]

For this subject's image gallery, see Gallery:Boo.

Audio samples[edit]

Help:MediaHaving trouble playing?

Names in other languages[edit]

Language Name Meaning Notes
Japanese テレサ[?]
Teresa
From「」(tere-ya, a very shy person) and possibly「~さ」(-sa, a nominalizing suffix meaning "-ness") Romanized in Super Mario World as "Telesa".
テレサ(しょう[38]
Teresa (Shō)
"Boo (Small)", in comparison to Big Boo Yoshi's Island DS
Chinese (simplified) 害羞幽灵[?]
Hàixiū Yōulíng
Shy Ghost
嘘嘘鬼[39]
Xūxū Guǐ
From「嘘」(, "boo") and「鬼」(guǐ, "ghost") prior to Mario Tennis Aces
淘气鬼[?]
Táoqìguǐ
Scallywag McDonald's China, Winter 2016 Happy Meal promotionMedia:Mario Happy Meal 2016 CN Promotional Image.jpg
Chinese (traditional) 害羞幽靈[?]
Hàixiū Yōulíng
Shy Ghost
幽靈[40]
Yōulíng
Ghost Talking Super Mario Animated Stickers
Dutch Boo[?] -
French Boo[?] -
Fantôme[?] Ghost
Les amis de Boo[?] Boo's friends Super Mario World instruction booklet
Boo Buddy[41] - Hotel Mario
German Buu Huu[?] Boo Hoo
Buu-Baby[42] Boo Baby Super Mario World
Italian "Boo" Diddly[43] -
Boo[?]
Boo Hoo[?] Mario Kart DS
Fischio[44] Whistle; literal translation from "to boo"
Korean 부끄부끄[?]
Bukkeu-bukkeu
Partial repetition of 부끄럽다 (bukkeureopda, to be shy)
Portuguese Bu[45] Boo
Monstro[46] Monster The Adventures of Super Mario Bros. 3
Romanian Bau Bau[47] Boogeyman The Adventures of Super Mario Bros. 3
Fantomă[48] Ghost Super Mario World television series
Boo[?] - McDonald's Romania, Summer 2016 Happy Meal promotionMedia:McDonaldsRomania2016Banner.jpg
Russian Бу[?]
Bu
Boo
Привидение[?]
Prividenie
Ghost prior to Luigi's Mansion: Dark Moon + its official website
Spanish (NOA) Boo[?] -
[?] Boo 2010-2017
Spanish (NOE) Boo[?] -

References[edit]

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  34. ^ NintendoEurope (January 26, 2024). Find out if two heads really are better than one in #MarioDonkeyKong's new co-op mode! Pass a controller to a friend and tackle the puzzle-platforming challenges together (and let Toad get a bit of glory too!).. X. Retrieved February 1, 2024.
  35. ^ Brian (October 3, 2018). New Super Mario Odyssey concept art shows a ton of scrapped costume ideas. Nintendo Everything.
  36. ^ GameXplain (April 23, 2023). Toadsworth & Toadette were in the Super Mario Bros. Movie?! Concept Art LEAK Reveals Cuts & Changes. YouTube. Retrieved April 23, 2023.
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