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{{about|the character debuting in ''[[Luigi's Mansion]]''|his ''[[Super Mario Sunshine]]'' counterpart|[[Big Boo (character)]]}}
{{articleabout|the character debuting in ''[[Luigi's Mansion]]''|King Boo from ''[[Super Mario Sunshine]]''|[[King Boo (Super Mario Sunshine)]]}}
{{character infobox
{{character-infobox
|image=[[File:Mario Party Star Rush King Boo.png|250px]]<br>Artwork from ''[[Mario Party: Star Rush]]''
|image=[[File:Mario Party Star Rush King Boo.png|250px]]<br>Solo artwork of '''King Boo''' for ''[[Mario Party: Star Rush]]''.
<!--DO NOT CHANGE THIS TO HIS LUIGI'S MANSION ARTWORK. Please see "Template:character infobox" for more information.-->
|full_name=King Boo
|species=[[Big Boo]]<br>[[Boo]] (''[[Luigi's Mansion]]'')
|first_appearance=''[[Luigi's Mansion]]'' ([[List of games by date#2001|2001]])
|first_appearance=''[[Luigi's Mansion]]'' ([[List of games by date#2001|2001]])
|latest_appearance=''[[Super Mario Party Jamboree]]'' (cameo) (2024)
|species=[[Boo]]
|latest_appearance=''[[Mario Kart 8 Deluxe]]'' ([[List of games by date#2017|2017]])
|latest_portrayal=[[Toru Asakawa]] (2001 - present)
}}
}}
{{quote|I am not afraid of [[Luigi|you]], fool! I fear only that infernal [[Poltergust 3000]] you carry on your back! Stupid machine! But I am a KING among [[Boo]]s! I swear it... I shall fear no mere house-cleaning device!!|King Boo|Luigi's Mansion}}
{{quote|I am not afraid of you, [[Luigi|fool]]! I fear only that infernal [[Poltergust 3000]] you carry on your back! Stupid machine! But I am a KING among [[Boo]]s! I swear it... I shall fear no mere house-cleaning device!!|King Boo|Luigi's Mansion}}
'''King Boo''' is a [[List of characters|character]] introduced in ''[[Luigi's Mansion]]''. He is both the main antagonist and arch-nemesis of [[Luigi]] in the [[Luigi's Mansion (series)|''Luigi's Mansion'' series]], which also includes him as the leader of the [[Boo]]s and [[Ghost (Luigi's Mansion series)|ghosts]]. King Boo is allied with [[Bowser]], whom he has assisted on various occasions. He has captured [[Mario]] in every game of the ''Luigi's Mansion'' series, prompting Luigi to rescue him. King Boo's main powers include materializing objects and spitting fire, though King Boo's power is often directly proportional to the number of Boos in his vicinity.
 
'''King Boo''' is the leader of the [[Boo]]s and the main antagonist of the ''Luigi's Mansion'' series, and is the arch-enemy of [[Luigi]]. He is also an ally of [[Bowser]], who has aided him in his various schemes. He is more than capable of devising and enacting villainous plans by himself, including his capture and imprisonment of [[Mario]]. Although not the biggest Boo, King Boo has abilities that far surpass that of the average ghost and he wields a number of impressive magical abilities, including the ability to materialize objects. King Boo's magical power is directly proportional to the number of Boos in his vicinity.
 
==History==
==History==
===''Luigi's Mansion'' series===
===''Luigi's Mansion'' series===
====''Luigi's Mansion''====
====''Luigi's Mansion''====
{{LM portrait infobox
{{portrait-infobox
|image=KingBooGold.png
|image=KingBooGold.png
|width=200px
|width=200px
|full_name=Bowser and King Boo, the Dastardly Duo (GameCube){{ref needed}}<br>King of Boos (3DS)
|fullname=Bowser and King Boo, the Dastardly Duo
|age=Unknown
|age=Unknown
|biography=Nothing is known about this mysterious entity. (GameCube){{ref needed}}<br>
|biography=Nothing is known about this mysterious entity.
The giant Boo adorned with a crown. It's hard at work on other evil plans involving the other Boos. (Nintendo 3DS)
|room=Roof/Secret Altar
|room=[[Roof (Luigi's Mansion)|Roof]]/[[Secret Altar]]
|hp=500
|hp=500
}}
}}
[[File:KingBoowser.jpg|thumb|upright=1.1|left|Artwork from ''Luigi's Mansion'', showing King Boo escaping from his Bowser suit]]
[[File:KingBoowser.jpg|thumb|200px|left|The ''Luigi's Mansion'' artwork of King Boo escaping from his Bowser suit.]]
[[File:LM 3DS Bowser King Boo.png|thumb|left|Screenshot from the 3DS version of ''Luigi's Mansion'', depicting the boss fight against King Boo]]
Before the events of ''[[Luigi's Mansion]]'', [[Professor E. Gadd]] captured [[Boolossus]]. Using a device called a [[Ghost Portrificationizer]], E. Gadd trapped Boolossus in a portrait and hung it in his Gallery inside [[Professor Elvin Gadd's Lab|his lab]] in [[Boo Woods]]. This angered King Boo, so he devised a plan to rescue Boolossus.
Prior to the events of ''[[Luigi's Mansion]]'' and its [[Luigi's Mansion (Nintendo 3DS)|remake]], King Boo somehow freed [[Boolossus]], who had been captured by [[Professor E. Gadd]] at some point, then King Boo ordered the release of every other [[Ghost (Luigi's Mansion series)|ghost]] that E. Gadd had captured.<ref>{{cite|quote=Well, then. Now I have to tell you...a horrifying story... The last ghost I caught was No. 22, Boolossus, but there are lots of Boos, and King Boo rallied them all to take revenge upon me! They used my machine to free Boolossus from the painting... then they went and turned all my other portraits back into ghosts, too!|author=Professor E. Gadd|title=''Luigi's Mansion''}}</ref> After releasing all the portrait ghosts, King Boo created a [[Luigi's Mansion (location)|haunted mansion]] near Professor E. Gadd's [[Lab]]. Luigi later receives a scam letter, presumably from King Boo, stating that he had won the mansion, and plans to celebrate over there with Mario.<ref>{{cite|publisher=Nintendo of America|language=en-us|date=2001|title=''Luigi's Mansion'' instruction booklet|page=6}}</ref> However, King Boo imprisons Mario into a portrait,<ref>{{cite|quote=I see! This is King Boo! ...SO! He is the one who has captured your Mario!|author=[[Madame Clairvoya]]|title=''Luigi's Mansion''}}</ref> and places him in the [[Secret Altar]].
 
King Boo and his forces attacked the laboratory. The Boos reversed the settings of the Portificationizer and released Boolossus. King Boo then ordered that all the ghosts that E. Gadd had captured should be released as well. After releasing all the portrait ghosts, King Boo created a [[Luigi's Mansion (place)|huge mansion]] and placed it next to the professor's lab. King Boo, his Boo minions, and the recently freed portrait ghosts decided to inhabit the mansion. With a huge mansion and an army of ghosts, King Boo decided to exact revenge upon [[Mario]] and [[Luigi]] by capturing them.
 
Hoping to capture Luigi, King Boo sends him a letter. The message states that Luigi has won a mansion in a contest and provides the location of the prize. Luigi asks his brother Mario to investigate the mansion and says that he will arrive shortly thereafter. Mario and [[Toad]] travel to the mansion, but right after Mario enters, he is instantly overwhelmed by King Boo's forces and captured. King Boo then imprisons him in a portrait, similar to how Boolossus was imprisoned. Mario is placed in the [[Secret Altar]] in the basement of the mansion. With Mario captured, King Boo is ready to capture Luigi.


During gameplay, King Boo is first seen in the [[Storage Room (Luigi's Mansion)|Storage Room]], where he and the other fifty [[Boo]]s spring out from the floor after Luigi opens it. When King Boo notices the [[Poltergust 3000]] on Luigi's back, he orders the Boos stop their surprise attack and retreat.<ref>{{cite|quote=What's that he's got on his back!? It's E. Gadd's Poltergust 3000! Everybody scram!|author=King Boo|title=''Luigi's Mansion''}}</ref> King Boo is located in the Secret Altar in the mansion's basement for the remainder of the game. Aside from the [[Key#Luigi's Mansion|Secret Altar Key]], reaching King Boo requires Luigi to have caught at least 40 Boos, or else King Boo blows Luigi to the [[Foyer (Luigi's Mansion)|Foyer]]. In the Secret Altar, King Boo stares at Mario in the painting while insulting the brothers' intelligence for having fallen for his scheme.<ref>{{cite|quote=... Seriously, though, who would actually believe that mansions get given away in contests?! Talk about stupid! What do they feed you Mario brothers anyway...gullible soup?|author=King Boo|title=''Luigi's Mansion''}}</ref> King Boo turns around to face Luigi and states his desire to add a Luigi painting to the collection. After this, King Boo flies into the Mario painting, which is changed to depict Bowser instead, and he inhales Luigi into the painting. Luigi is transported into an arena modeled after the [[Roof (Luigi's Mansion)|roof]], and this is where the final boss fight occurs. It is actually just a Bowser suit controlled by King Boo during the battle, both to retreat in and for attacking Luigi. Attacks from the Bowser suit include shooting flames at Luigi (dealing 10 HP of damage), throwing [[Spiked Ball]]s (also dealing 10 HP of damage), or inhaling Luigi and spitting him out, inflicting 15 HP of damage. King Boo emerges from the Bowser suit after Luigi shoots a Spiked Ball at the Bowser suit right before its inhaling attack, blasting off Bowser's head. King Boo has 500 HP, more than any of the other [[portrait ghost]]s, and as Luigi depletes King Boo's health, the Bowser suit's head hovers around the arena, shooting icy blasts, which can freeze Luigi on contact. Seconds later, King Boo returns into the dormant Bowser body and the head reattaches itself. The process repeats throughout the battle, but once King Boo's life falls below 200 HP, the head of the suit reattaches backwards when King Boo returns into the suit, which then runs around aimlessly before properly reorienting his head. When King Boo is vacuumed into the Poltergust 3000, Luigi automatically receives King Boo's [[Crown (King Boo)|Crown]]. Back at the [[Portrificationizer Chamber]], both King Boo and the fake Bowser can be seen in the [[Ghost Portrificationizer]] as it presses them and the other portrait ghosts of area 4 back into paintings, marking an end to Luigi's journey. King Boo and the fake Bowser are both included within the same portrait.
While waiting for Luigi, King Boo and his Boo minions wait behind a secret door in the floor of the [[Storage Room]]. When Luigi enters the room and reveals the secret door, the Boos spring out from the floor. However, the Boos (including King Boo) stop their surprise attack when they notice the [[Poltergust 3000]] on Luigi's back. Luigi had been given the Poltergust 3000 by E. Gadd so he could recapture the Portrait Ghosts and save his brother. The Poltergust 3000 is one of the few things King Boo fears, and he and the other Boos scatter and hide in the mansion. King Boo travels to the Secret Altar in the mansion's basement.
{{br|left}}
====''Luigi's Mansion: Dark Moon'' / ''Luigi's Mansion 2 HD''====
[[File:King Boo Artwork - Luigi's Mansion Dark Moon.png|thumb|left|Artwork from ''Luigi's Mansion: Dark Moon'' depicting King Boo's redesigned appearance]]
King Boo reprises his role as both the main antagonist and final boss of ''[[Luigi's Mansion: Dark Moon]]''. He escaped some time after [[Professor E. Gadd]] had sold the portrait of King Boo from [[Luigi's Mansion|the previous game]] at a garage sale (a car boot sale in British English versions).<ref>{{cite|quote=I wonder how he escaped from his portrait in the first place! Hmm, maybe I shouldn't have sold it at the garage sale...|author=Professor E. Gadd|title=''Luigi's Mansion: Dark Moon''}}</ref> King Boo shatters the [[Dark Moon]] into six pieces with a bolt of energy from his crown, turning the [[Ghost (Luigi's Mansion series)|ghosts]] of [[Evershade Valley]] into becoming hostile, mischievous beings that serve King Boo. Towards the climax of Luigi's journey, in which he recovers the Dark Moon shards from each of the mansions, King Boo is revealed to have trapped Mario in a painting again. King Boo later captures Luigi after he recovers the last Dark Moon piece and pulls him back into [[??? (Luigi's Mansion: Dark Moon)|his dimension]]. King Boo makes Luigi realize that he had escaped from the painting and broke the Dark Moon. King Boo intends to use the ghosts as an army to conquer both Evershade Valley and the [[Mushroom Kingdom]] while also planning to put Luigi, E. Gadd, and all their friends into paintings for revenge. King Boo then engages into battle with Luigi, where his attacks include summoning a series of magic lightning bolts with his crown and attempting to slam Luigi with his body. The latter causes [[Spike Ball|spiked ball]]s to fall from above, which will roll around the tilting platform to pose a hazard. King Boo will stop moving when looked at, and when caught underneath a falling ball he will become stunned, leaving him vulnerable to the [[Poltergust 5000]]. Once his HP is depleted and he gets sucked into the Poltergust 5000, he immediately breaks out and sends Luigi into a floating hallway. He then swells to a large size and begins rolling after Luigi, attempting to stall Luigi with various obstacles, such as falling shelves and suits of armor with large polearms. If King Boo does hit Luigi, he will pause for a moment to laugh maliciously. Once Luigi makes it out of the hall, he will land on another tilting platform, where King Boo will repeat his previous patterns at a higher intensity. The battle concludes after the third battle and second hallway chase, leading to King Boo being defeated and sucked into the Poltergust 5000.


King Boo's appearance is derived from ''Luigi's Mansion'', albeit larger and with an additional full set of teeth and sped-up voice from other games in the [[Super Mario (franchise)|''Super Mario'' franchise]]. Some of King Boo's new features include a purple tongue and mouth and glowing purple eyes.
The special key that [[Vincent Van Gore]] holds unlocks the path to the Secret Altar. However, he is locked in the [[The Artist's Studio|Artist's Studio]] on the third floor of the mansion. After capturing him and retrieving the key, Luigi discovers that he still cannot enter the Secret Altar. If Luigi attempts to enter the Secret Altar without catching a certain number of Boos, King Boo blows Luigi to the [[Foyer]], the entrance of the mansion. Since King Boo's power is related to the number of Boos in the mansion, Luigi can weaken him by capturing the Boos hidden in various rooms. After Luigi captures at least forty of the mansion's fifty Boos, King Boo loses his ability to blow Luigi from the Secret Altar. Once King Boo is weakened, Luigi enters King Boo's Secret Altar.


====''Luigi's Mansion Arcade''====
Upon entering the Altar, Luigi notices King Boo staring at Mario in the painting. King Boo turns around to face Luigi and states his desire to add a Luigi painting to the collection. After this, King Boo flies into the Mario painting hanging on the wall. The picture of Mario transforms into Bowser, then the new Bowser painting inhales Luigi into the canvas, transporting Luigi into an arena that resembles the mansion's [[roof]]. Luigi then confronts Bowser. In reality, this is a suit of Bowser that King Boo controls from the inside and uses as a shield.
King Boo is the final boss in ''[[Luigi's Mansion Arcade]]''. He leads his ghosts in an uprising to get revenge on Luigi and E. Gadd. King Boo assaults Luigi on the [[Terrace (Luigi's Mansion: Dark Moon)|terrace]] of the [[Treacherous Mansion]], after Luigi has sucked in all of his minions with the [[Poltergust 5000]]. Protected by a magical barrier, he can only be attacked once he lets his guard down. King Boo throws bombs at the player, moves very quickly and clones himself multiple times over the course of the fight. However, only the original has the power-enhancing gem on his crown. Just like in ''Luigi's Mansion: Dark Moon'', he escapes the Poltergust 5000 two times before being defeated for good.
 
King Boo uses this Bowser suit to attack Luigi, shooting flames at him causing ten HP of damage, and even attempting to inhale him into its mouth, deducting fifteen HP upon spitting him out. The suit also has the ability to create three large spiked bombs and toss them at Luigi, which when exploding, take away ten HP. Luigi can use his Poltergust 3000 to grab one of the spiked explosives and release it into the Bowser suit's mouth. This attack blasts the head off of the Bowser suit, causing King Boo to exit the shield and expose himself to the Poltergust 3000. Luigi begins to deplete the ghost's five hundred hit points. Meanwhile, the suit's head hovers around the arena, shooting icy blasts at Luigi, which will freeze him briefly. King Boo, after a while, flies back into the dormant Bowser body and the head reattaches itself, resuming the fight. Luigi repeats this process, slowly weakening King Boo, but after King Boo's life falls below two hundred HP, the head of the suit reattaches backwards whenever he returns to the Bowser body, causing the Bowser suit to run around aimlessly. The suit soon corrects its head and resumes the fight. Eventually, Luigi manages to completely drain King Boo's HP and capture him inside the Poltergust 3000.
 
After the battle, Luigi receives King Boo's crown, worth 5000G, and adds it to his treasure collection. Upon returning to the mansion, Luigi quickly travels to Professor E. Gadd's lab. In the lab, Luigi connects the Poltergust to the professor's Portrificationizer, dumping its contents into the machine. Oddly, not only does the spirit of King Boo appears in the Portrificationizer, but also the fake Bowser. With King Boo captured, Professor E. Gadd hangs his new portrait in an empty room in his gallery.
 
====''Luigi's Mansion: Dark Moon''====
[[File:King Boo Artwork - Luigi's Mansion Dark Moon.png|thumb|King Boo's appearance in ''Luigi's Mansion: Dark Moon.]]
King Boo reappears in the [[Nintendo 3DS]] game, ''[[Luigi's Mansion: Dark Moon]]'' once again as the main antagonist and final boss. He looks similar to his original appearance from ''Luigi's Mansion'', but retains the full set of teeth and sped-up voice he had in his appearances in the other ''Mario'' titles and is also much larger.


====''Luigi's Mansion 3''====
It is revealed later in the game that [[Professor Elvin Gadd|Professor E. Gadd]] had sold the portrait of King Boo from ''[[Luigi's Mansion]]'' at a garage sale (a car boot sale in PAL versions), which is how the king escaped. King Boo shatters the [[Dark Moon]] into six pieces with a bolt of energy from his crown, which contained a power-enhancing gem. This turns the once-friendly ghosts of [[Evershade Valley]] hostile and mischievous as well as sprawling the Dark Moon's pieces to each Mansion of the valley, which Luigi has to recover.  
[[File:LM3 E3 screen 04.png|thumb|Screenshot from ''Luigi's Mansion 3'', showing King Boo chase Luigi down a hallway]]
King Boo is the main antagonist and final boss in ''[[Luigi's Mansion 3]]''. King Boo utilizes his design from ''Luigi's Mansion: Dark Moon'', but with more detail on his crown and a more expressive scowl. King Boo had been released from Professor E. Gadd's custody by [[Hellen Gravely]], hoping to win his affection. Seeking revenge on Luigi for his previous defeats, King Boo traps E. Gadd, Mario, [[Princess Peach]] and the three [[Toad (species)|Toads]] in portraits before going after Luigi, who narrowly avoids it by going down a laundry chute. King Boo later entrusts Hellen Gravely with Mario's portrait. It is implied that King Boo planned for Luigi to win both due to Gravely's failures by that time and so he could capture both alongside Peach by using the latter as bait, also recapturing the Toads and Professor E. Gadd just after Mario was freed. King Boo fails to capture Luigi again atop the hotel because the [[Polterpup]] shoved Luigi out of the way of King Boo's portrait. Following this is a battle against King Boo, who can take damage from Luigi throwing a [[bomb]] from a spiked ball into his mouth, then from having his tongue pulled from Luigi and [[Gooigi]] together and being slammed repeatedly. After this, King Boo will generate a clone that attacks alongside him. The clones have only two teeth, like King Boo from ''Luigi's Mansion''. After this is done twice, King Boo will enlarge the painting, and Luigi will then have four minutes to attack King Boo one last time. However, a [[Gold Bone]] can reset the timer. The battle ends with King Boo being recaptured by Luigi and placed in a containment jar alongside Gravely, much to his frustration. As the purple gem in his crown was taken by Luigi after the final battle, it is missing from his crown.<ref>{{cite|author=ProsafiaGaming|date=October 30, 2019|url=youtu.be/GYyMEi0iTZw?t=643|timestamp=10:43|title=Luigi's Mansion 3 - All Endings & Ranks + Credits|publisher=YouTube|accessdate=November 20, 2019}}</ref> The [[Game Over]] sequence shows King Boo gleefully looking at Luigi and the others trapped in their own portraits.


===''Super Mario-kun''===
Towards the end of the game, it is revealed that he has captured Mario like he did in the last game. After Luigi gets the last Dark Moon piece and returns to the [[Bunker (place)|Bunker]], he captures Luigi and pulls him back into the [[Paranormal Dimension]]. He reveals to Luigi he escaped from the painting and broke the Dark Moon, causing the ghosts to become under his control. He intends to use the ghosts as an army to conquer the world. He also plans to put Luigi and E. Gadd into paintings as well for revenge. He then engages into battle with Luigi but he fails and is sucked into the Poltergust once again.
[[File:KingBoo SuperMarioKun.jpg|thumb|A depiction of King Boo in ''Super Mario-kun'']]
King Boo appears in a short chapter on ''Luigi's Mansion'' of volume 26 of ''[[Super Mario-kun]]''. Luigi reveals King Boo by knocking off the Bowser illusion's head, though King Boo is immediately sucked into the Poltergust 3000, unlike the games.


===''Mario Kart'' series===
====''Luigi's Mansion Arcade''====
====''Mario Kart: Double Dash!!''====
King Boo appears as the final boss for ''[[Luigi Mansion Arcade|Luigi's Mansion Arcade]]'', leading his ghosts in an uprising to get revenge on Luigi and Professor E. Gadd. However, after Luigi has sucked in all of his minions with the [[Poltergust 5000]], King Boo assaults Luigi on the balcony of the [[Treacherous Mansion]]. Protected by a magical barrier, he can only be attacked once he lets his guard down. King Boo throws bombs at the player, moves very quickly and clones himself multiple times over the course of the fight. However, only the original has the power-enhancing gem on his crown. Just like in ''Luigi's Mansion: Dark Moon'', he will escape the Poltergust 5000 two times before being defeated for good.
[[File:Petey Piranha and King Boo - Mario Kart Double Dash.png|left|thumb|175px|Artwork from ''Mario Kart: Double Dash!!'', showing King Boo and Petey Piranha as partnered racers]]
 
King Boo is an unlockable character in ''[[Mario Kart: Double Dash!!]]''. It is the first playable appearance of King Boo. He is partnered with [[Petey Piranha]] by default. Both characters are unlocked simultaneously by placing first in the [[Star Cup]] in Mirror Mode. King Boo is billed a heavyweight, due to his large size. He and Petey Piranha can uniquely use nearly every other character's [[Special Item (Mario Kart series)|Special Item]], barring the [[Green Fireball]] or the [[Birdo's Egg]]. King Boo's personal kart is the [[Boo Pipes]], which is a gray version of Petey's [[Piranha Pipes]] kart, but with an image of a Boo on the pipe stood on by the back driver. Additionally, it notably has a low speed stat and high acceleration stat, in contrast with the other heavyweight karts in the game. King Boo appears to slightly shrink when he becomes the driver. On the second "Thanks for Playing!" screen, King Boo appears in the background chasing [[Wario]] and [[Waluigi]].
===''Super Mario-Kun''===
[[File:KingBoo SuperMarioKun.jpg|thumb|left]]
King Boo appears in a short chapter on ''Luigi's Mansion'' of volume 26 of ''[[Super Mario-Kun]]''. As in the game, Luigi reveals King Boo by knocking off the Bowser illusion's head. Unlike in the games, however, King Boo is immediately sucked in.
{{br}}


In the {{file link|MarioKartDoubleDashDebugMenuBossTeresa.png|debug menu}} found in the demos and debug build of the game, King Boo is referred to as "Boss Teresa," the name used for the [[Big Boo (character)|Big Boo]] boss from ''[[Super Mario 64]]'' and ''[[Super Mario Sunshine]]'' outside localized releases, instead of his usual name "King Teresa".
===''Super Mario'' series===
====''Super Mario Sunshine''====
{{main|King Boo (Super Mario Sunshine)}}
[[File:KingbooSunshine.jpg|thumb|left|150px|The King Boo of ''Super Mario Sunshine''.]]
A different "King Boo" is the leader of the Boos on [[Isle Delfino]] and appears as a boss in [[Sirena Beach]], the sixth world of ''[[Super Mario Sunshine]]''. He is apparently made out of goop, as can be seen during his defeat, meaning that [[Bowser Jr.]] might have drawn him. This game also notes that he dislikes spicy food, which serves as the key to defeat him.


====''Mario Kart DS''====
He was named King Boo by the American localization team, (as seen by the episode name, "King Boo Down Below) but the original Japanese version assigns a unique name to this character (ボステレサ, meaning Boss Boo).
King Boo is a boss in ''[[Mario Kart DS]]''. He is the encountered at the end of Level 4 in Missions Mode, where he is battled by [[Princess Peach|Peach]] on the [[Lava Arena]]. King Boo appears every few seconds, stealing at least ten coins collected by Peach around the course and making all uncollected coins disappear before teleporting to another area. Peach can drive through King Boo to retrieve the coins and cause the others to reappear. King Boo is defeated once all fifty coins are collected by Peach.


A variation of the King Boo and Bowser portrait from ''Luigi's Mansion'' appears in the [[DS Luigi's Mansion|titular race course]], except King Boo is not depicted in it.
====''Super Mario 64 DS''====
[[File:SM64DS BBH Kingboo.png|thumb|King Boo as encountered in ''Super Mario 64 DS''.]]
King Boo appears in the ''[[Super Mario 64]]'' remake, ''[[Super Mario 64 DS]]''. As the boss who locked [[Luigi]] away, he captures a part of [[Princess Peach's Castle]]. However, in the English translation of the game, King Boo is incorrectly called [[Big Boo]], even though he is clearly different to the Big Boo of Big Boo's Haunt.  


====''Mario Kart Arcade GP 2''====
Regardless, King Boo aids Bowser in his conquest of Peach's Castle by capturing Luigi and imprisoning him in [[Big Boo's Haunt]]. Specifically, Luigi is imprisoned behind a painting of himself inside the haunted mansion. Mario heads to the [[Big Boo Battle]] level to save Luigi. Upon entering the level, he is greeted by King Boo, and from there he must listen for King Boo's cackle and enter the door where it is loudest. Eventually Mario reaches the end and fights King Boo to free Luigi. To defeat King Boo, Mario has to follow King Boo's movements in the arena's mirror and [[Stomp|stomp]] him when he comes close enough. Ultimately, [[Mario]] saves his brother from King Boo and together (with [[Yoshi]] and [[Wario]] once he is saved) they defeat Bowser and save [[Princess Peach]].
King Boo makes a cameo in ''[[Mario Kart Arcade GP 2]]''. A large picture of him appears near the end of [[Yoshi Park 2]], inhaling many ghosts and the racers and returning racers to the start of the course.


====''Mario Kart Wii''====
====''New Super Luigi U''====
[[File:MKW SNES Ghost Valley 2 Screenshot 2.png|thumb|left|Screenshot from ''Mario Kart Wii'']]
King Boo makes a small cameo in ''[[New Super Luigi U]]'' in the Secret Exit of [[Vanishing Ghost House]], where his art from ''Luigi's Mansion: Dark Moon'' can be seen in the form of a sign hanging from the side of the building<ref>http://www.youtube.com/watch?feature=player_detailpage&v=nOL66GavUAM#t=1551s</ref>.
King Boo is an unlockable playable character in ''[[Mario Kart Wii]]''. He is billed a large-sized driver. King Boo is unlocked by either completing the [[Star Cup]] in 50cc or playing 750 races. King Boo features a good handling bonus and a small off-road bonus. King Boo is one of the few characters whose his standing animation on the character select screen has been changed from ''Mario Kart: Double Dash!!'', no longer hanging his tongue out of his mouth prior to being selected. King Boo is the character used by the Staff Ghost on the {{classic-link|SNES|Ghost Valley 2}} course. He is seen during the end credits driving the [[Jetsetter]] on said course.
{{br|left}}


====''Mario Kart 8 Deluxe''====
===''Mario Kart'' series===
[[File:MK8D King Boo Battle Mode Screenshot.png|thumb|Screenshot from ''Mario Kart 8 Deluxe'', showing King Boo wear a crown in [[Battle Mode]]]]
====''Mario Kart: Double Dash!!''====
King Boo is a playable character in ''[[Mario Kart 8 Deluxe]]''. He does not appear in [[Mario Kart 8|the original]]. King Boo is among the lightest of the five heavyweight groups, sharing his statistics with [[Rosalina]], [[Link]], and [[Pauline]]. King Boo has the lowest top speed and weight of all the heavyweights, all while sharing similar acceleration as other heavy groups. Both King Boo's handling and mini-turbo boost is amongst the best of the heavyweights (shared with the [[Metal Mario|metal]] [[Pink Gold Peach|characters]] and Petey Piranha). His traction stat is noticeably strong, and it is the highest compared to others in his weight class. King Boo has the third best base traction stat out of every racer. King Boo's horn sound uses the same sound effect as the ''[[Super Mario Sunshine]]'' [[Big Boo (character)|boss of the same name]] makes when hit by a [[pepper]]. King Boo is the 150cc Staff Ghost for {{classic-link|GBA|Boo Lake}} and the 200cc Staff Ghost for three courses: [[Twisted Mansion]], {{classic-link|GBA|Snow Land}}, and {{classic-link|3DS|Rosalina's Ice World}}. Although without a rival in Grand Prix in the base game, King Boo was uniquely given a rival in [[Petey Piranha]] since the fifth wave of the ''[[Mario Kart 8 Deluxe – Booster Course Pass|Booster Course Pass]]'', and vice-versa.
[[File:Petey Piranha and King Boo - Mario Kart Double Dash.png|left|thumb|King Boo and [[Petey Piranha]] in ''Mario Kart: Double Dash!!''.]]
King Boo is an unlockable character in the racing game ''[[Mario Kart: Double Dash!!]]''. This is his first appearance in a spin-off, and also his first playable appearance, resulting in further appearances in the [[Mario Kart (series)|''Mario Kart'' series]]. Despite being a ghost, King Boo is classified as a heavyweight driver due to his large size. His partner is [[Petey Piranha]], and both have the ability to use almost any other character's special item (if they are going to get a special item, it is randomly chosen, based on their race position). They can not receive the [[Green Fireball]] or the [[Birdo Egg]], however.


====''Mario Kart Arcade GP DX''====
King Boo's personal kart is the [[Boo Pipes]], which is a gray version of Petey's [[Piranha Pipes]] kart, but with an image of a Boo instead of a Piranha Plant where the item-using partner stands. However, the more important difference between the two is that, while the Piranha Pipes has high speed and low acceleration, the Boo Pipes is vice versa, with low speed and high acceleration, which is quite odd for a heavy kart. In fact, the only other heavy kart like this is the [[Offroader]] from ''Mario Kart Wii''.
King Boo is a playable character in ''[[Mario Kart Arcade GP DX]]''. He is a super handling type character, sharing his stats with [[Baby Mario]] and [[Baby Peach]]. He was originally only playable during a limited-time event campaign held between October 18, 2017, and January 10, 2018, but not in international releases. King Boo could become available even after the event if Bana Passport users collected three in-game stamps, though an update on October 10, 2018 made King Boo available for users who did not participate in the aforementioned event.


====''Mario Kart Tour''====
When partnered with Petey Piranha, the camera will be slightly zoomed out behind them during gameplay; this pairing is the only one to do so. He also appears to slightly shrink when he becomes the driver. On the second "Thanks for Playing!" screen (after beating the Special Cup with a Gold Trophy while all other cups already have a Gold Trophy), King Boo appears in the background chasing [[Wario]] and [[Waluigi]].
[[File:MKT King Boo Luigi's Mansion.jpg|thumb|left|170px|King Boo (Luigi's Mansion) in ''Mario Kart Tour'']]
King Boo is a playable character in ''[[Mario Kart Tour]]''. He was introduced in the 2019 [[Halloween Tour (2019)|Halloween Tour]]. King Boo is classified as a Super driver, and his [[Special skill (Mario Kart Tour)|special skill]] is the [[Lucky Seven]]. King Boo has two variants were introduced, including '''King Boo (Luigi's Mansion)''', also introduced in the 2019 Halloween Tour, uses his design from ''Luigi's Mansion 3''. This variant is listed as a High-End character and has the [[Bob-omb Cannon]] special skill. '''King Boo (Gold)''' was introduced for the 2020 [[Halloween Tour (2020)|Halloween Tour]], sporting a golden body and blue-jeweled silver crown. Also listed as a High-End driver, he uses the [[Coin Box]] as his special skill and, like other metallic characters, a distorting filter is applied to his voice. Unlike most characters, King Boo's head icon is recycled from ''Mario Kart 8 Deluxe'', rather than having a new one that uses his in-game model. Similarly, the head icons for his ''Luigi's Mansion'' and gold counterparts also use their in-game artwork.


In pre-release materials, including the [[List of Mario Kart Tour pre-release and unused content|beta test]], King Boo was classified as a Super Rare (High-End) driver and his special skill was the [[Double Bob-ombs]], sharing his change in classification between the beta test and final game with Rosalina.
====''Mario Kart DS''====
{{br}}
[[File:King BooMKDS.png|thumb||left|King Boo battle in ''Mario Kart DS''.]]
In ''[[Mario Kart DS]]'', King Boo, along with six other bosses from ''Super Mario 64 DS'', re-appears as one of the bosses of the Mission Mode. King Boo is the boss of the fourth level, with the playable character being [[Princess Peach|Peach]]. Peach attempts to collect fifty [[Coin|coins]] on the [[Lava Arena]] within the time limit, but after a few seconds King Boo appears, surrounds her, and then attacks her, stealing ten of her coins and making all the other, uncollected coins disappear, before teleporting to another area of the arena. Also, if Peach falls in the lava, she will lose coins. To take them back, Peach has to drive and bump into King Boo, making him transparent. Then, she can drive through him again, retrieving her coins and making the other coins reappear. However, King Boo soon reappears a few moments later to get the coins again. After collecting all fifty coins, Peach finally defeats King Boo. Also, the [[Bowser]] and King Boo painting from ''[[Luigi's Mansion]]'' appears in the [[Luigi's Mansion (course)|Luigi's Mansion]] race course, although only Bowser can be seen in the painting.{{br|left}}


===''Super Mario'' series===
====''Mario Kart Arcade GP 2''====
====''Super Mario 64 DS''====
King Boo makes a cameo appearance in ''[[Mario Kart Arcade GP 2]]'' on the [[Yoshi Park 2]] course in the Horror House. Here, a large picture of him appears near the end of the course where it inhales many ghosts and the racers. As the player drives into his mouth, they are warped back to the beginning of the course.
[[File:King Boo SM64DS boss fight.png|thumb|Screenshot from ''Super Mario 64 DS'' of the boss fight against King Boo]]
King Boo,<ref>{{cite|title=''Nintendo Power'' Volume 188|date=February 2005|page=79|publisher=Nintendo of America|language=en-us|author=Tsuboike, Yoshio, et al.|quote=(Luigi’s being held captive by King Boo, so you’ll have to rescue him first.)}}</ref> though erroneously named Big Boo in {{wp|Western world|Western}} releases,<ref>{{cite|quote=Eee hee hee! I am Big Boo, the spookiest of all the spirits! I locked up the [[Luigi|wimpy green moustache man]]. And I'll do the same to [[Mario|you]]! Eee hee hee! Since I'm a ghost, I can turn invisible in the mirror's reflection. You'll have to attack me from behind to defeat me. But you'll die of fright before that ever happens! And then you'll be one of us!|author=King Boo (Big Boo)|title=''Super Mario 64 DS''}}</ref> is a boss in ''[[Super Mario 64 DS]]''. King Boo and Big Boo use the same model, with a modifier denoting the presence of the crown. King Boo is located in a room at the end of [[Big Boo Battle]]. The audibility of King Boo's cackling voice is a guide for Mario to navigate his way through several rooms to the end. King Boo is only ever visible from the mirror in the arena, and can be attacked from being [[stomp]]ed when approached closely enough. After being defeated, King Boo drops the [[Luigi Key]] he had been guarding, allowing the player to unlock Luigi's door in the [[Peach's Room|princess's room]]. King Boo can be fought against optionally by other player characters (barring [[Yoshi]]), including [[Luigi]] and [[Wario]]. King Boo's dialogue when encountering Luigi shows him to be confused but deciding to attack Luigi nonetheless. In their initial encounter, King Boo is shown to be alarmed by Wario's appearance.


====''New Super Luigi U'' / ''New Super Mario Bros. U Deluxe''====
====''Mario Kart Wii''====
King Boo makes a cameo appearance in ''[[New Super Luigi U]]'' and ''[[New Super Mario Bros. U Deluxe]]''. His art from ''Luigi's Mansion: Dark Moon'' can be seen in the form of a sign hanging from the side of the building in the secret exit of [[Vanishing Ghost House]].
[[File:SNESGhostValley22-MKWii.png|thumb|right|King Boo in ''Mario Kart Wii''.]]
King Boo returns in ''[[Mario Kart Wii]]'' as a large-sized driver, and is unlocked by completing the [[Star Cup]] in 50cc. He features a good handling bonus and a small off-road bonus, which comes in handy for vehicles like the [[Offroader]], [[Wario Bike]], and [[Phantom]]. He is used as the Staff Ghost on the [[Ghost Valley 2|<small>SNES</small> Ghost Valley 2]] course. In the credits, he appears driving the [[Jetsetter]] on the <small>SNES</small> Ghost Valley 2 course.


====''Super Mario Bros. Wonder''====
King Boo is one of very few characters to have his standing animation on the Character Select screen altered from ''Mario Kart: Double Dash!!'' In this case, his tongue is not sticking out of his mouth the whole time like before; now, before selecting him, his tongue is still in his mouth. Other characters whose sprites were altered include: [[Yoshi]], who is now looking at the screen; [[Birdo]], whose bow was made larger; [[Diddy Kong]], who is looking in a different direction; Wario, who now has short sleeves; Waluigi, who now performs a slightly different animation; and [[Donkey Kong]], whose mouth is not as wide open and is looking in another direction.
[[File:SMBWKingBoo.png|thumb|left|Screenshot from ''Super Mario Bros. Wonder'']]
King Boo is an enemy in ''[[Super Mario Bros. Wonder]]''. This is the first game including him as a regular enemy.<ref name=CM>{{cite|language=ja|author=Nintendo 公式チャンネル|date=September 28, 2023|url=youtu.be/SiLFeqd99cw|title=スーパーマリオブラザーズ ワンダー CM ワンダー篇|publisher=YouTube|accessdate=September 28, 2023}}</ref> King Boo chases the player characters while singing with an operatic baritone voice. King Boo covers his face when looked at, though continues singing, albeit with a voice distortion filter. When the player characters collect the [[Wonder Seed]], King Boo's crown will fall off as he shrinks into a regular Boo.<ref>{{cite|author=YTSunny|date=October 19, 2023|url=youtu.be/KWRFFbE5OXc|title=Super Mario Bros Wonder - All Songs / Music Levels|language=en|publisher=YouTube|accessdate=November 4, 2023}}</ref> King Boo appears in [[Light-Switch Mansion]] after activating the [[Wonder Effect]] "A Night at Boo's Opera." and in [[The Final Battle! Bowser's Rage Stage]] upon reaching the Jack-o-Lantern pumpkins. Once players enter the zero-gravity section, King Boo again loses his crown, shrinks into a regular Boo, and floats away off-screen surrounded with music notes.<ref>{{cite|author=Mixeli|date=October 19, 2023|url=youtu.be/jRiP86jxIME|title=Super Mario Bros. Wonder - Final Boss Bowser Battle and Ending (HQ)|publisher=YouTube|accessdate=November 4, 2023|language=en}}</ref>


====''Super Mario Run''====
====''Mario Kart 8 Deluxe''====
A statue of King Boo in his ''Luigi's Mansion: Dark Moon'' design was made available in ''[[Super Mario Run]]''{{'}}s Kingdom Builder during the ''[[Luigi's Mansion 2 HD]]'' event that coincided with the latter game's release. It is unlocked by completing six "Luigi's Ghost Hunt" missions.
[[File:MK8D Image8.png|thumb|King Boo in ''Mario Kart 8 Deluxe'', wearing a crown from Battle Mode.]]
{{br}}
King Boo returns as a playable character in ''[[Mario Kart 8 Deluxe]]'', the enhanced port of ''[[Mario Kart 8]]'' released for [[Nintendo Switch]]. He is among the lightest of the 5 heavyweight groups, sharing his stats with [[Rosalina]] and [[Link]]. He has the lowest top speed and weight of all the heavyweights, all while sharing similar acceleration as other heavy groups. However, his handling is amongst the best of the heavyweights (shared with the metal characters), and as the weight stat affects drift, his lower weight stat grants him a sharper drifting angle compared to the other heavyweights. He also has the strongest mini-turbo boost of the heavyweights. Finally, his traction stat is oddly strong, being far and away the best in his weight class, and the 3rd best base traction stat in the game.


===''Mario Baseball'' series===
===''Mario Baseball'' series===
====''Mario Superstar Baseball''====
====''Mario Superstar Baseball''====
King Boo is a default playable character in ''[[Mario Superstar Baseball]]''. He is a member of [[Wario]]'s baseball team, the [[Wario Muscles|Wario Greats]]. Being billed a Power character, King Boo can hit long outfield drives and even home runs. King Boo has good batting, although curved like Boo's, and he has average pitching and fielding and a slow running speed. King Boo's ability is [[Super Jump (Mario Baseball series)|Super Jump]], allowing him to catch high balls in the outfield. King Boo shares good chemistry with [[Boo]] and [[Petey Piranha]] but bad chemistry with [[Luigi]] and [[Baby Luigi]]. King Boo uses the same baseball bat as Boo, but with a crown on top.
King Boo is a playable character in ''[[Mario Superstar Baseball]]'' and a member of [[Wario]]'s baseball team, the [[Wario Greats]]. He does not need to be unlocked. He is a power hitter, using his white, crowned, Boo-like baseball bat to hit long outfield drives and even homeruns. King Boo has chemistry with [[Boo]] and [[Petey Piranha]], and he has bad chemistry with [[Luigi]]. However, like Boo, his hits are usually very curved, and this causes them to be fouls most of the time.


====''Mario Super Sluggers''====
====''Mario Super Sluggers''====
[[File:MSS King Boo Batting Screenshot.png|thumb|left|Screenshot from ''Mario Super Sluggers'', showing King Boo batting at [[Yoshi Park]] during the night]]
[[File:KingBoo-Batting-MSS.png|thumb|right|King Boo batting at [[Yoshi Park]] at night.]]
King Boo is a playable character in ''[[Mario Super Sluggers]]''. His stats are similar as before, although his pitching is improved and matches his batting power. King Boo's ability is Teleport, allowing him to teleport safely onto the base during close plays if performed correctly. King Boo shares good chemistry with Petey Piranha, Boo, [[Wiggler]], and [[King K. Rool]] whilst having bad chemistry with [[Mario]], Luigi, [[Yoshi]], [[Baby Mario]], Baby Luigi, [[Baby Peach]], and [[Baby Daisy]]. The baseball bat used by King Boo was redesigned to have a crown emblem above the Boo emblem instead of an actual crown on top. In this game only, the colors of the jewels on King Boo's crown are reversed. In Challenge Mode, King Boo is a member of Wario's team, the Wario Muscles, and appears right after defeating [[Bowser Jr.]] at the [[Wario City]] stadium, stating that he turned invisible and was watching the whole game. However, he is uninterested in joining the player's team unless the team has Boos with them, more specifically the [[Mini Boo]] item.
King Boo reappears in ''[[Mario Super Sluggers]]'' and is one of the few characters that were on Wario's team in the last game that are still on it. He is once again a power hitter, and he also excels in pitching, with both stats being his highest, though his running and fielding are still rather poor. In Challenge Mode, he appears immediately after the player defeats [[Bowser Jr.]] at the [[Wario City]] stadium, stating that he turned invisible and was watching the whole game. However, he is uninterested in joining the player's team unless the team has some [[Boo]]s with them. This is accomplished by finding both [[Boo]] and the [[Mini Boos]] item. In this game, King Boo has chemistry with [[Petey Piranha]], [[Boo]], [[King K. Rool]], and [[Wiggler]], but he has bad chemistry with [[Mario]], [[Luigi]], [[Baby Mario]], and [[Baby Luigi]].
{{br|left}}
 
His baseball bat does not have a physical crown on it anymore. In this game, it is represented as a crown picture above the "Boo mouth" picture. As well, in this game only, the colors of the jewels on his crown are reversed.
{{br|right}}


===''Super Princess Peach''===
===''Super Princess Peach''===
[[File:Shriek Mansion 3-6.png|thumb|Screenshot from ''Super Princess Peach'', showing the battle against King Boo]]
[[File:Shriek Mansion 3-6.png|thumb|left|[[Princess Peach]] battling King Boo in ''Super Princess Peach''.]]
King Boo is a boss in ''[[Super Princess Peach]]''. He is encountered in [[Shriek Mansion 3-6]]. While going after [[Princess Peach]], King Boo attacks by firing blue homing [[fireball]]s. King Boo can be damaged from direct light, which is created by having his own flames light the candles spread throughout the room. After a few attacks, King Boo uses his [[Gloom]] vibe to cry and therefore extinguish the candle flames. King Boo is eventually defeated from enough hits, and Peach rescues the [[Toad (species)|Toad]] he had been guarding.
[[File:SPP-King Boo Sprite.PNG|frame|Sprite of King Boo in ''Super Princess Peach''.]]
King Boo aids Bowser in ''[[Super Princess Peach]]''. In this game, Bowser's forces capture both Mario and Luigi with some Toads. Although King Boo does not directly watch over Mario or Luigi, he is given a captured Toad to guard, as Mario is Bowser's prisoner while Luigi is [[Kamek]]'s prisoner.
 
After adventuring through [[Vibe Island]], Peach discovers where King Boo is and engages him in combat. During the battle, King Boo fires blue homing [[Fireball|fireballs]] at Peach and will chase her regardless of whether she looks at him or not. Peach can damage King Boo with direct light, which is made by having his own flames light the candles spread throughout the room. After a few attacks, King Boo uses his [[Gloom]] vibe, which causes him to cry, which extinguishes the candle flames. After enough attacks, King Boo is eventually defeated. With King Boo eliminated, Peach rescues the Toad and continues against Bowser's forces.


===''Mario Party'' series===
===''Mario Party'' series===
====''Mario Party 8''====
====''Mario Party 8''====
King Boo is a non-playable character in ''[[Mario Party 8]]''. He is the proprietor of the board [[King Boo's Haunted Hideaway]]. He hides in one out of three altars and gives a [[Star (Mario Party series)|Star]] to whoever can find him in exchange for ten Coins. King Boo returns the player to the starting point from a [[Warp Pipe]] through "summoning the bizarre" after they purchase the Star while also altering the layout of the board, which also ejects any other players from the board. If the player does not have enough coins, or declines his Star, King Boo causes a pitfall to appear beneath them, returning the player to the starting point without any Star, and he does not shuffle the board. There are purchasable King Boo sounds from the [[Fun Bazaar]], along with a figurine titled "King Boo's Revenge". When the player presses {{button|wii|A}} on the figurine during the Figurine Parade, King Boo floats upward while glowing. During the board event, Pickpocket Pinball, if the player does not manage to steal anything, the hosting [[Little Mouser|mouse]] gives off a sound similar to King Boo's.
[[File:KBMP8SC.jpg|thumb|King Boo reluctantly gives [[Waluigi]] a [[Star]] in the Japanese version of ''Mario Party 8''.]]
King Boo makes his first appearance in a ''[[Mario Party (series)|Mario Party]]'' game in ''[[Mario Party 8]]''. He gives out [[Star]]s on his own board [[King Boo's Haunted Hideaway]]. He hides in one out of three altars and gives the player a Star for ten coins if they can find him where he is hiding. If the player is able to buy the Star, he will "summon the bizarre" and disappear, causing the player to jump into a [[Warp Pipe]] that returns them to the starting point. This "makeover mojo" causes the whole layout of the course to change. However, if they do not have enough coins, King Boo will cause a pitfall to appear under the player, causing them to return to the starting point and allowing the next player that reaches him to buy the Star. Additionally, if the player fails to steal anything from the board event Pickpocket Pinball, the hosting [[Little Mouser|mouse]] sounds like King Boo. The player can purchase King Boo sounds from the [[Fun Bazaar]], along with a figurine titled "King Boo's Revenge". When the player presses {{button|wii|A}} on the figurine during the Figurine Parade, King Boo floats up and gives off a brilliant glow, as if he is a light bulb.


====''Mario Party 9''====
====''Mario Party 9''====
[[File:MP9 King Boo's Puzzle Attack 1.png|thumb|left|Screenshot from ''Mario Party 9'', showing King Boo in his minigame, King Boo's Puzzle Attack]]
[[File:KingBooPuzzleAttack1-MP9.png|250px|thumb|left|'''King Boo''', in ''[[Mario Party 9]]''.]]
King Boo is a boss in ''[[Mario Party 9]]''. He is encountered at [[Boo's Horror Castle]], being fought in the minigame, [[King Boo's Puzzle Attack]]. King Boo takes damage from competitors lining power-up icons in lines of three or more. Upon reaching half damage, King Boo starts throwing Boos onto the field that can stun the player's cursors. In the minigame [[Bowser's Block Battle]], King Boo can materialize above the stage when Bowser throws the die with all the stage bosses' faces on it and if it lands with King Boo's face on top. King Boo summons five Boos that move in a counterclockwise direction while moving outwards. When the Boos reach the boundaries of the stage, King Boo summons five Boos that move clockwise instead. After that, King Boo disappears from the arena. King Boo also has his own constellation, the "Ghost Major," which is placed in farthest left portion of the sky, near [[King Bob-omb]]'s constellation and right next to Boo's constellation after buying it for fifty Minigame Points. The [[Mario Party 9#Museum|Museum]]'s Sound Test has two voice sounds named "King Boo's Entrance," one of which is of King Boo and the other being Boo.
King Boo appears as the stage boss of the board [[Boo's Horror Castle]] in ''[[Mario Party 9]]''. He is fought in the minigame, [[King Boo's Puzzle Attack]], where the competitors line up power-ups in lines of three or more to deal damage to him. Once his health reaches halfway, he throws Boos onto the field which can stun the player's cursors, making them unable to move until they shake the Boo off. What is unique about his boss battle is that if a player gets the Final Attack, they get ten points instead of the usual three, likely because the players can easily accumulate points up to fifty. In the [[Bowser's Block Battle|final fight]] against Bowser, King Boo can also appear to hinder the players' progress. If Bowser throws the die with all the stage bosses' faces on it and King Boo's face appears on top, King Boo will materialize above the stage. Then, he will summon five Boos that move in a counterclockwise direction while moving outwards. When the Boos reach the boundaries of the stage, King Boo summons another five Boos, except this time they move clockwise. After that, King Boo disappears from the battle unless his face appears on the top of the die again.
{{br|left}}
 
Like most other characters in the game, King Boo has a constellation that can be returned to the sky; it is called the Ghost Major. It is located in the farthest left portion of the sky, near [[King Bob-omb]]'s constellation and right next to Boo's constellation. Like all constellations, it can be bought for fifty Minigame Points. Also, in the Museum's [[Museum|Sound Test]], there are two voice sounds with the name "King Boo's Entrance"; one is of King Boo and the other is actually of Boo.


====''Mario Party 10''====
====''Mario Party 10''====
[[File:King Boo's Tricky Tiles MP10.png|thumb|Screenshot from ''Mario Party 10'', showing King Boo in his minigame, King Boo's Tricky Tiles]]
[[File:King Boo's Tricky Tiles MP10.png|thumb|right|King Boo as he appears in ''Mario Party 10''.]]
King Boo is a boss in ''[[Mario Party 10]]''. He is fought in the minigame [[King Boo's Tricky Tiles]]. King Boo is damaged from player characters jumping on light switches. After losing half of his health, King Boo becomes angered and begins a new attack where he swaps Boos with platforms and blocks the camera, preventing players from memorizing the platforms more clearly. In amiibo Party mode, King Boo can be found on the [[Luigi Board]].
King Boo reappears in the next title, ''[[Mario Party 10]]''. He returns as a boss in the minigame [[King Boo's Tricky Tiles]]. In order to defeat him, the player must remember which platforms are false, and then run around until they can jump on a light switch (one is worth 3 points, and another worth 1 point). Like other bosses, King Boo gets angered after the players deplete his health halfway. The technique that King Boo uses is that he swaps Boos with platforms and he blocks the camera, so the player can't see the platforms very well and remember which ones are false. He can also be seen on the [[Luigi Board]], which appears in the game's amiibo Party mode.
{{br}}


====''Mario Party: Star Rush''====
====''Mario Party: Star Rush''====
King Boo is a boss in ''[[Mario Party: Star Rush]]''. He is fought in the minigame [[King Boo's Light Smite]]. King Boo is damaged from player characters shining a light from their [[Light Box]]es at him. After losing half of his health, King Boo increases the difficulty by having the rotating platforms move faster and causing more Peepas to appear.
King Boo returns as a boss in ''[[Mario Party: Star Rush]]'' in his minigame, [[King Boo's Light Smite]]. In order to defeat him, players have to use [[Light Box]]es which they need to carry over rotating platforms while evading [[Peepa]]s. Once he loses half his health bar, the rotating platforms start moving faster, making it more difficult to reach the other side.
 
====''Mario Party Superstars''====
King Boo is a non-playable character in ''[[Mario Party Superstars]]''. He appears on [[Horror Land]], replacing the [[Big Boo (character)|Big Boo]] found on the original board.<ref>{{cite|author=Nintendo|date=September 23, 2021|url=www.youtube.com/watch?v=dG9fAtmYdlM|title=Nintendo Direct - 9.23.2021|publisher=YouTube|accessdate=September 23, 2021}}</ref> King Boo summons Boo lackeys to steal either Coins or Stars from all opponents who have any, with the latter option costing 150 coins. King Boo is encountered at nighttime only and through a path that requires a [[Skeleton Key]], like with Big Boo from the original version.
 
====''Super Mario Party Jamboree''====
[[File:SMPJ King Boo Reaction.png|thumb|80px]]
Although King Boo himself does not physically appear in ''[[Super Mario Party Jamboree]]'', he makes a cameo as a selectable reaction.<ref>Mario Party Legacy (September 9, 2024). [https://www.youtube.com/watch?v=Nnv5j5d8_Ho 10 Minutes of Super Mario Party Jamboree - Gameplay Preview]. ''YouTube''. Retrieved September 9, 2024.</ref>


===''Mario & Sonic'' series===
===''Mario & Sonic'' series===
====''Mario & Sonic at the Olympic Winter Games''====
====''Mario & Sonic at the Olympic Winter Games''====
[[File:King_Boo_-_Winter_Games.jpg|thumb|left|Screenshot from the Wii version of ''Mario & Sonic at the Olympic Winter Games'', showing King Boo and Mario competing in Alpine Skiing Downhill]]
[[File:King_Boo_-_Winter_Games.jpg|thumb|150px|left|[[Mario]] races against King Boo in ''Mario & Sonic at the Olympic Winter Games''.]]
King Boo is a non-playable character in the [[Mario & Sonic at the Olympic Winter Games (Wii)|Wii version]] and the [[Mario & Sonic at the Olympic Winter Games (Nintendo DS)|Nintendo DS version]] of ''Mario & Sonic at the Olympic Winter Games''. Both games feature King Boo as a rival, but in differing way. In console versions, King Boo is the first opponent in both Individual and Group Festival modes, challenging the player to the [[Alpine Skiing Downhill]] event, while Individual Festival includes him again as the sixth opponent, this time challenging the player to [[Giant Slalom]]. In the Adventure Tours mode of the handheld version, King Boo is the mid-boss of [[Polastraits]], where he specifically chooses Luigi to race him in Giant Slalom due to his fearful nature. In both versions, King Boo travels downhill smoothly, not having any skis, to which [[Cream (character)|Cream]] or [[Toad]] considers to be unfair in the console version. King Boo can be traveled through in the handheld version only.
In the [[Wii]] [[Mario & Sonic at the Olympic Winter Games (Wii)|version]] of ''Mario & Sonic at the Olympic Winter Games'', King Boo appears as the first and sixth (in Individual Festival mode only) rival. King Boo races the player in the [[Alpine Skiing|Alpine Skiing Downhill]] event in both Individual and Group Festival modes but he only races the player in Giant Slalom in the Individual Festival mode. King Boo has no skis so he goes down the hill smoothly. If the player loses to him, the guide (either [[Cream the Rabbit|Cream]] or [[Toad]]) says that it is unfair because King Boo has no skis.
 
In the Adventure Tours mode in the [[Nintendo DS|DS]] [[Mario & Sonic at the Olympic Winter Games (Nintendo DS)|version]], King Boo is the mid-boss of [[Polastraits]]. When the challenger approaches him, King Boo tells Mario/Sonic that he must race someone afraid of him. He selects Luigi and they must race in Giant Slalom. In this version, King Boo is transparent and the player can ski through him. He also appears slightly larger than in his other appearances.


====''Mario & Sonic at the London 2012 Olympic Games''====
====''Mario & Sonic at the London 2012 Olympic Games''====
[[File:M&S 2012 The Ghostly Tower.png|thumb|Screenshot from the 3DS version of ''Mario & Sonic at the London 2012 Olympic Games'', showing King Boo in [[The Ghostly Tower]] episode]]
King Boo appears in the next installment of the ''Mario & Sonic'' series, ''Mario and Sonic at the London 2012 Olympic Games''. In the [[Mario & Sonic at the London 2012 Olympic Games (Wii)|Wii version]] he is one of the characters that can be found in the London Party mode, and when he is encountered, he will challenge the player to the [[Dream Sprint]] event. Since he has no feet, though, it is questionable how he gets the ball to roll. If the player reaches the goal line before him, they will get a sticker as an award.
King Boo is a non-playable character in the [[Mario & Sonic at the London 2012 Olympic Games (Wii)|Wii version]] and [[Mario & Sonic at the London 2012 Olympic Games (Nintendo 3DS)|Nintendo 3DS version]] of ''Mario & Sonic at the London 2012 Olympic Games''. He is a rival in both versions, but his role differs entirely, and the handheld version also features King Boo as a [[List of badges in Mario & Sonic at the London 2012 Olympic Games (Nintendo 3DS)|badge]] that can be obtained from the badge machine. In the console version, King Boo is encountered in London Party mode, challenging the player to the [[Dream Sprint]] event and offering stickers as a reward for beating him. In the handheld version, King Boo has a brief role in Story Mode, guarding the [[Phantasmal Fog]] at the [[Tower of London]], and teams up with a Boo to challenge [[Sonic]] and [[Tails]] in [[Badminton (Doubles)]], though King Boo and Boo both lose and flee. King Boo is last seen in Story Mode during the opening ceremony for the games.
 
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In the [[Nintendo 3DS|3DS]] [[Mario & Sonic at the London 2012 Olympic Games (Nintendo 3DS)|version]], King Boo teams up with a Boo to face [[Sonic the Hedgehog|Sonic]] and [[Miles "Tails" Prower|Tails]] in the Badminton Doubles event. After winning, the player completes Sonic's second episode.
 
====''Mario & Sonic at the Sochi 2014 Olympic Winter Games''====
====''Mario & Sonic at the Sochi 2014 Olympic Winter Games''====
King Boo is a non-playable character in ''[[Mario & Sonic at the Sochi 2014 Olympic Winter Games]]''. He is a rival in [[Legends Showdown]] mode, during Area 4, where he challenges the player to [[Short Track Speed Skating 1000m]].
King Boo appears in ''[[Mario & Sonic at the Sochi 2014 Olympic Winter Games]]'' as a rival in the [[Legends Showdown]] mode. He is found in Area 4, and is raced against in [[Short Track Speed Skating 1000m]].


===''Mario Golf: World Tour''===
===''Mario Golf: World Tour''===
King Boo is a non-playable character in ''[[Mario Golf: World Tour]]''. He floats in the background alongside other [[Boo]]s on Hole 4 of [[Bowser's Castle (golf course)|Bowser's Castle]]. King Boo's name is sometimes displayed on the tournament scoreboard.
King Boo makes a cameo appearance in ''[[Mario Golf: World Tour]]'' on Hole 4 of [[Bowser's Castle (golf course)|Bowser's Castle]]. He is floating in the background alongside other [[Boo]]s, and he is also much larger than in other games. His name can also appear on the tournament scoreboard.
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===''Super Smash Bros.'' series===
===''Puzzle & Dragons: Super Mario Bros. Edition''===
There are a few items of King Boo in the [[Super Smash Bros. (series)|''Super Smash Bros.'' series]]. In ''[[Super Smash Bros. for Nintendo 3DS]]'', there is a [[Trophy (Super Smash Bros. series)|trophy]] of King Boo. In ''[[Super Smash Bros. Ultimate]]'', King appears in his ''Luigi's Mansion: Dark Moon'' design as an Advanced-class Neutral-type {{iw|smashwiki|primary spirit}}, which is enhanced from the Boo primary [[Spirit (Super Smash Bros. Ultimate)|spirit]] after it has reached level 99. When equipped, the spirit grants the fighter slower fall speed after jumping and has 3 support slots. King Boo is listed as the 49th spirit, though he was listed as the 121st spirit alongside the rest of the spirits from the ''Luigi's Mansion'' series in version 1.0.0.<ref>{{cite|author=BeardBear|date=December 6, 2018|url=youtu.be/CiK68gO5XQM?t=336|timestamp=05:36|language=en|title=Super Smash Bros. Ultimate - All 1297 Spirits|publisher=YouTube|accessdate=May 26, 2024}}</ref>
King Boo appears as an enemy in ''[[Puzzle & Dragons: Super Mario Bros. Edition]]'', mostly appearing at the Ghost House courses. His main attribute is Dark, while his sub-attribute is Light.


===''Puzzle & Dragons: Super Mario Bros. Edition''===
As an ally, King Boo's skill can heal 1000 HP, and change all Heart Orbs into Dark Orbs. His Awoken Skill raises the amount of time that the player has to move Orbs around.
[[File:PDSMBE-KingBoo-TeamImage.png|thumb|Graphic from ''Puzzle & Dragons: Super Mario Bros. Edition'']]
King Boo is a boss and enemy in ''[[Puzzle & Dragons: Super Mario Bros. Edition]]'', mostly appearing at the Ghost House courses. His main attribute is Dark, while his sub-attribute is Light. As an ally, King Boo's skill can heal 1000 HP, and change all Heart Orbs into Dark Orbs. His Awoken Skill raises the amount of time that the player has to move Orbs around.


As an enemy, King Boo is capable of decreasing the player's maximum time to move Orbs around. Also, King Boo is treated as a generic enemy, so he can still appear as an enemy, regardless of whether or not the player has King Boo in their party. Big Boo can be transformed into a King Boo with six [[Boo Mushroom]]s as a Transformation Item, making it possible to create multiple King Boos on the player's team.
As an enemy, King Boo is capable of decreasing the player's maximum time to move Orbs around. Also, King Boo is treated as a generic enemy, so he can still appear as an enemy, regardless of whether or not the player has King Boo in their party.


When King Boo attacks, a bunch of [[Boo]]s attack with him.
When King Boo attacks, a bunch of [[Boo]]s attack with him.


King Boo's best stats are his ATK and RCV, while his HP is at an average level.
King Boo's best stats are his ATK and RCV, while his HP is at an average level. The player can get King Boo by using six [[Boo Mushroom]]s on a [[Big Boo]].


===''Mario & Luigi: Paper Jam''===
===''Mario & Luigi: Paper Jam''===
{{quote|Look at this little scrap. Friend of yours, is he? Well, if you like your friend, you better stop attacking me! Now, don't go thinking it's OK to attack my little minion either. Who knows what could happen if he dropped your little friend there... You got that?|King Boo|Mario & Luigi: Paper Jam}}
[[File:M&L Paper Jam King Boo.png|thumb|150px|King Boo, attempting to fool Mario and Luigi by disguising himself as Paper Mario, in ''Mario & Luigi: Paper Jam''.]]
[[File:M&L Paper Jam King Boo.png|thumb|left|250px|King Boo, attempting to fool Mario and Luigi by disguising himself as Paper Mario, in ''Mario & Luigi: Paper Jam'']]
King Boo appears as a boss in ''[[Mario & Luigi: Paper Jam]]'', making his official ''[[Mario & Luigi (series)|Mario & Luigi]]'' series debut. He is encountered and fought in [[Gloomy Woods]] after the trio separate, leading to him kidnapping Mario and [[Paper Mario (character)|Paper Mario]]; leaving Luigi alone to find them, like in the ''Luigi's Mansion'' series. After finding [[Mario]], he and Luigi begin to look for Paper Mario. They eventually find King Boo instead, disguised as Paper Mario. When they group together, King Boo reverts back to normal and laughs at the Bros. for a second, before re-transforming; Mario and Luigi then turn around, and are unaware of King Boo's presence. When they turn around again, King Boo reveals himself again, but is caught by the duo. In an attempt to fool them, he immediately reverts back to Paper Mario, and tries to convince the Bros. that he is the real Paper Mario, but fails. King Boo then transforms into Paper Peach and then Paper Bowser, before finally giving up; reverting back to his true form, causing the battle to commence.
King Boo is a boss in ''[[Mario & Luigi: Paper Jam]]''. King Boo has a papercraft version of himself piloted by [[Morton]] and [[Lemmy]], which is fought in [[Bowser's Castle]]. The Mario Bros. use Papercraft Yoshi to fight it.
 
The real King Boo is encountered and fought in [[Gloomy Woods]] after the trio separate, leading to him kidnapping Mario and [[Paper Mario (character)|Paper Mario]]; leaving Luigi alone to find them, similarly to the ''Luigi's Mansion'' series. After finding [[Mario]], he and Luigi begin to look for Paper Mario. They eventually find King Boo instead, disguised as Paper Mario. When they group together, King Boo reverts back to normal and laughs at the Bros. for a second, before re-transforming; Mario and Luigi then turn around, and are unaware of King Boo's presence. When they turn around again, King Boo reveals himself again, but is caught by the duo. In an attempt to fool them, he immediately reverts back to Paper Mario, and tries to convince the Bros. that he is the real Paper Mario, but fails. King Boo then loses control of his transformation powers, as he quickly transforms into Paper Peach and then Paper Bowser, before finally gaining control and giving up; reverting back to his true form, causing the battle to commence.
 
King Boo attacks by spitting blue fireballs at either Mario or Luigi before inhaling them; making them need to avoid the fireballs twice, and splitting into five copies before floating slowly towards the trio, turning invisible as he gets near; which the trio must counter using their hammers around 2 seconds after a copy turns invisible. During the battle, King Boo calls a [[Paper Boo]] holding the real Paper Mario onto the battlefield; threatening to harm Paper Mario if the bros attack either himself or the Paper Boo. In order to save Paper Mario, Mario and Luigi must defeat the minion holding onto Paper Mario, causing it to drop him. If King Boo is attacked while the Paper Boo is on the battlefield, he deals damage to Paper Mario. After a few turns, another Paper Boo can grab Paper Mario again, taking him out of the battle (which gets rid of Paper Mario's copies) temporarily. Finally, King Boo also has a chase attack where he grows bigger before attempting to shoot a giant blue fireball at the trio; which Mario and Luigi have to counter by throwing Paper Mario's boomerang form into King Boo's mouth while it is open. Once defeated, Paper Mario is reunited with the duo and the group continues to [[Mount Brrr]].
 
King Boo's crown leaves him unaffected by the brothers' [[Jump]] attack, though he can be hit by [[Hammer]] attacks, unlike Paper Boos, and certain [[Bros. Attack]]s, such as the [[Rocket Blast]] and [[Mega Thwonk]]'s jumping attacks (only in the [[Arcade (Mario & Luigi: Paper Jam)|arcade]]). Attacking King Boo from above results in the Bro. taking 1 damage in the manner of jumping on a spiked enemy. The [[Dropchopper]], however, can circumvent this as it can be aimed towards King Boo's forehead instead of his crown and can then damage him.
 
The splitting attack used by King Boo is a reference to (if not a direct copy of) the [[Dark Star]]'s splitting attack in ''[[Mario & Luigi: Bowser's Inside Story]]'', except King Boo takes damage if countered unlike the Dark Star's version due to it being invincible. As well, if the Mario Bros. continue to attack King Boo without freeing Paper Mario, his slapping Paper Mario may be an allusion to [[Lady Bow]] and her slap attacks<ref>{{cite|author=Gaming Reinvented|date=January 8, 2016|url=www.youtube.com/watch?v=74SYLTwZ2Aw|title=Mario & Luigi Paper Jam; King Boo Kills Paper Mario!|publisher=YouTube|accessdate=February 7, 2024}}</ref>. Also, King Boo's voice clips from ''[[Mario Kart Wii]]'' are reused.
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===''Mario + Rabbids Kingdom Battle''===
King Boo makes a cameo appearance in ''[[Mario + Rabbids Kingdom Battle]]''. He is seen in [[Spooky Trails]], where an image of King Boo appears on the ground in the area where the gramophone is found.


===''Mario Tennis Aces''===
King Boo attacks by spitting blue fireballs at either Mario or Luigi before inhaling them; making them need to avoid the fireballs twice, and splitting into five copies before floating slowly towards the trio, turning invisible as he gets near; which the trio must counter using their hammers around 2 seconds after a copy turns invisible. During the battle, King Boo will call a [[Boo#Paper Mario series|Paper Boo]] holding the real Paper Mario onto the battlefield; threatening to harm Paper Mario if the bros attack either himself or the Paper Boo. In order to save Paper Mario, Mario and Luigi must defeat the minion holding onto Paper Mario, causing it to drop him. If King Boo is attacked while the Paper Boo is on the battlefield, he will deal damage to Paper Mario. After a few turns, another Paper Boo can grab Paper Mario again, taking him out of the battle (which gets rid of Paper Mario's copies) temporarily. Finally, King Boo also has a chase attack where he will grow bigger before attempting to shoot a giant blue fireball at the trio; which Mario and Luigi have to counter by throwing Paper Mario's boomerang form into King Boo's mouth while it is open. Once defeated, Paper Mario is reunited with the duo and the group continue to [[Mount Brrr]].  
King Boo is a boss in ''[[Mario Tennis Aces]]'', as of version 2.0.0. His voice clips are identical to a Boo's. King Boo is part of the Boo Hunt Co-op Challenge. King Boo hovers around the court while Frenzy Time is active, and can be hit by several tennis balls to earn the players more [[coin]]s. King Boo disappears once either his health bar or the Frenzy bar is depleted.


===''Dr. Mario World''===
Due to his crown, King Boo is immune to the brothers' [[Jump]] attack (but he can be hit by [[Hammer]] attacks, unlike Paper Boos) and certain [[Bros. Attack]]s, such as the [[Rocket Blast]] and [[Mega Thwonk]]'s jumping attacks (only in the [[Arcade (Mario & Luigi: Paper Jam)|arcade]]). Attacking King Boo using attacks from above will result in the Bro. taking 1 damage as if they were jumping on a spiked enemy. The [[Dropchopper]], however, can circumvent this as it can be aimed towards King Boo's forehead instead of his crown and can then damage him.
[[File:DMW-Dr. King Boo Solo Art.png|thumb|100px|Dr. King Boo in ''Dr. Mario World'']]
King Boo is an assistant in ''[[Dr. Mario World]]'', as of the November 14, 2019 update.<ref>{{cite|author=DrMarioWorld_EN|date=November 14, 2019|url=x.com/Drmarioworld_EN/status/1195137397639536641|title=Blue: "Tiers 6 and 7 were added to versus mode! Apparently you can add a new assistant, King Boo, from the battle boxes for tier 7. You need 2,600 battle points to reach tier 7, but I know you can do it!" #DrMarioWorld|publisher=X|accessdate=September 28, 2020}}</ref> He is a battle box-exclusive assistant, only obtainable from battle boxes for tier 7 or above in versus mode. In versus mode, he has a chance of sending 2 extra rows of viruses to the opponent if the attack lands. In stage mode, he grants a chance of 5 extra capsules being added when 5 capsules are remaining, which will have a chance to activate again if the condition is met again but didn't activate earlier. However, it won't activate for the rest of the stage if this effect has successfully activated.  


'''Dr. King Boo''', available September 28th, 2020, is an alias of King Boo exclusive to ''Dr. Mario World''. Like [[Dry Bowser|Dr. Dry Bowser]], he cannot be obtained in staffing and must be obtained through either in-app purchases or unlocking him through rewards such as in [[World 20]]'s Special Stage or through certain referrals. His skill is to eliminate an amount of viruses even those that would normally take multiple hits to clear such as [[floatie virus]]es. In stage mode, the amount is 5 viruses (4 prior to version 2.2.0), while in versus mode, the amount differs based on level, where it is 4 at level 1 with three extra viruses per level, up to 16 at the maximum level of level 5. In stage mode, if there are no more viruses while this skill is activated, it will eliminate one random object that can be eliminated instead, excluding capsules.
The splitting attack used by King Boo is a reference (if not a direct copy) of one of the [[Dark Star]]'s attacks in ''[[Mario & Luigi: Bowser's Inside Story]]''. Additionally, King Boo also has a Papercraft version of himself controlled by [[Morton Koopa Jr.|Morton]] and [[Lemmy Koopa|Lemmy]]. [[Papercraft#King Boo|Papercraft King Boo]] is fought in [[Bowser's Castle]] prior to the encounter with the real King Boo. Also, King Boo's voice clips from ''[[Mario Kart Wii]]'' are reused.
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===''The Super Mario Bros. Movie''===
[[File:King Boo TSMBM Screenshot.png|thumb|120px|King Boo in ''The Super Mario Bros. Movie]]''
King Boo has a minor appearance in ''[[The Super Mario Bros. Movie]]'' at Bowser and Peach's wedding with his ''Super Mario'' design. He is seen sitting a few rows behind [[King Bob-omb]]. He does not have any role in the climax nor does he speak. He disappears once Peach, Mario, and [[Donkey Kong]] crash the wedding. Compared to his usual design, his face is smaller and is more expressive, taking up less space on his overall body and somewhat resembling that of the ''[[Super Mario Sunshine]]'' [[Big Boo (character)|King Boo]]. He is also the only Boo that appears in the movie.
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==General information==
==General information==
===Physical appearance===
===Physical appearance===
{{multiple image
King Boo's appearance has changed throughout his video game history. In his debut appearance in ''[[Luigi's Mansion]]'', King Boo has dark red eyes, a blue tongue, two vampire-like fangs, a purplish complexion, and a ruby crown. In recent appearances, he resembles a white Boo with a golden, five-pointed crown, though he is noticeably larger. As well, the crown has a blue jewel on the front and four red jewels around the sides in every game except ''Mario Super Sluggers''. He first appeared in this form in ''Mario Kart: Double Dash!!'', and it remains his current appearance to this day. However, his appearance in ''[[Luigi's Mansion: Dark Moon]]'' shows him with his original appearance, although he retains a full row of four teeth. He also has his eyes surrounded by a black shadow and has a more purple mouth and tongue, as well as his crown having a purple jewel.
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King Boo has appeared with two distinct designs, one used in most of his appearances and one used for the [[Luigi's Mansion (series)|''Luigi's Mansion'' series]].
 
King Boo's common design was first used in ''[[Mario Kart: Double Dash!!]]'', where he appears as a large Boo with a golden, five-pointed crown. With this design, the crown has a blue jewel on the front and four red jewels around the sides in every game except ''Mario Super Sluggers'', where the colors are reversed. Like other Boos, King Boo is generally shown with an open, wide grin; however, when looked at, he closes his mouth and bashfully hides his face with his hands. In certain games like ''[[Mario Party 9]]'', King Boo's emotions are denoted by an aura surrounding him: when happy, he glows with a blue aura, and when angry, he glows with a red aura. Sometimes he also has steam coming out of him to display his anger. In ''[[Dr. Mario World]]'', he has a doctor's mirror on his crown and he carries a medicine box by strap. His gold variant in ''[[Mario Kart Tour]]'' is based on this design, and has an entirely golden body similar to a [[Gold Boo]], though his teeth and tongue are golden as well. His crown is silver and all five jewels are blue.
 
King Boo has a more unique and sinister look in the ''Luigi's Mansion'' series. In his original appearance in ''[[Luigi's Mansion]]'', King Boo has dark red eyes, a blue tongue, two vampire-like fangs, a greenish complexion, and a ruby in a gold, round-edged crown. He is also roughly the same size as other Boos. Starting from ''[[Luigi's Mansion: Dark Moon]]'', King Boo retains his original appearance but with some modifications: he now has a full row of four teeth, a white body, and a larger size matching those of King Boo's modern ''Super Mario'' design. Additionally, he has purple eyes, a dark indigo mouth and tongue, and a purple jewel atop his crown, which has additional pointed edges. He also has a larger shadow surrounding his eyes. In ''[[Luigi's Mansion 3]]'', King Boo is shown to be more expressive, often scowling at his allies and enemies and appearing visibly disappointed when captured in the game's credits. His speech icon also uses a green shading reminiscent of his initial appearance, while his portraits show him with a purple crown. In ''Mario Kart Tour'', King Boo's ''Luigi's Mansion'' variant uses this design, although his tongue is more purple than indigo.


===Personality===
===Personality===
[[File:LM3 2D Artwork 1.png|thumb|King Boo shows a particular disdain for Luigi in the ''Luigi's Mansion'' series.]]
King Boo is shown to have a deep hatred for the Mario Bros., especially Luigi after he defeats him in ''[[Luigi's Mansion]]''. He says that he fears nothing except the [[Poltergust 3000]], although in ''[[Super Mario 64 DS]]'' he admits that Wario's face scares him, rendering the previous statement a generalization. Also, in ''Mario Super Sluggers'', King Boo says that he finds little Boos cute and says that he actually considers his Boo minions his friends and cares for them. This is shown in ''Luigi's Mansion'' where he goes after [[Boolossus]] after he is captured by [[Professor Elvin Gadd|Professor E. Gadd]]. In ''Mario & Sonic at the Olympic Winter Games'', he says that he is unbeatable at the [[Alpine Skiing]] events, though this is proven false when the player beats him. Bowser would sometimes call upon him to aid him in his plans showing that the two of them are allies. He doesn't seem to care for ghosts that aren't Boos, however he will use them in his plans as tools rather than subjects. After breaking out of the portrait he was placed in at the end of ''[[Luigi's Mansion]]'' he displays a complete disregard for anything that interferes with his revenge and displays several sociopathic traits including a disregard for others well being and at one point nearly causes the Mario verse to collapse. King Boo also loves to scare and toy with his opponents. Despite King Boo's huge size he will still cover his face in fear when looked at much like a normal Boo showing that he still has a shy nature like his minions, however also like a normal Boo he will attack when his foes back is turned. Also, in both ''Luigi's Mansion'' games he traps Mario in a painting as well as Toads and various other objects, Professor E Gadd also comments on how King Boo redecorated the [[Treacherous Mansion]] to make it scarier. He also goes into fits of rage when his plans don't go the way he wants. Although King Boo is much larger than regular Boos, he is not the largest of the Boos. However, even gigantic Boos like Boolossus follow his leadership despite their superior size. Lastly, King Boo has a distinct cackle, which is significantly lower in pitch than other Boos.
King Boo is a villain who enjoys scaring and tricking his enemies by creating illusions and then overpowering and trapping them. King Boo likes to taunt Luigi, such as in ''Luigi's Mansion 3'', where he says "It's-a me, King Boo!", mocking Luigi's and Mario's Italian accent. In ''Luigi's Mansion: Dark Moon'', King Boo pretends to confuse between Luigi and Baby Luigi. In ''[[Mario & Sonic at the Olympic Winter Games (Nintendo DS)|Mario & Sonic at the Olympic Winter Games]]'', he insists on racing against Luigi, knowing how afraid he is of ghosts. King Boo also holds grudges, referring to his prior defeat in ''Luigi's Mansion'' sarcastically as "good times" and he has stated that he is "sick to double death" of Luigi. In frustration, he recites the noise of the [[Poltergust 3000]], which he refers as a "disgusting machine", capturing him.
 
King Boo admires paintings and other decorations, such as making lengthy comments on how good Mario is as a painting; E. Gadd also comments that King Boo has decorated [[Treacherous Mansion]] to be scarier. He also desires to trap Luigi and E. Gadd through similar means.
 
King Boo boasts frequently about himself, always proclaiming his success in escaping and claiming to fear nothing except the Poltergust 3000, although in ''[[Super Mario 64 DS]]'' he admits that Wario's face scares him. Despite his power, he still covers his face in fear when looked at, much like a normal Boo. King Boo has a distinct cackle, which is quite lower in pitch than other Boos. King Boo's arrogance is displayed in ''Mario & Sonic at the Olympic Winter Games'', where he claims to be unbeatable at Alpine Skiing.


===Powers and abilities===
===Powers and abilities===
In ''[[Luigi's Mansion]]'', King Boo's power increases when he is in the presence of other Boos. For example, King Boo can blow Luigi to the Foyer when enough Boos are in the mansion. King Boo can also materialize things, including pulling a mansion out of the ghost dimension, creating replicas of some of Mario's enemies, other Boos, dimensions to battle in, bubbles, and blue fire (which he spits out of his mouth). King Boo can regenerate from his crown in ''[[Super Princess Peach]]''
Besides possessing the abilities of other Boos, including the ability to teleport, King Boo has a numerous amount of other powers. Notably in ''[[Luigi's Mansion]]'', King Boo's power increases when he is in the presence of other Boos. For example, King Boo has the power to blow Luigi to the Foyer when enough Boos are in the mansion. King Boo also has the power to materialize things, including pulling a highly detailed mansion out of the ghost dimension and creating lifelike paranormal replicas of some of Mario's enemies. He has shown the ability to create Boos or dimensions to battle in and even bubbles and blue fire, which he spits out of his mouth. King Boo is also shown to be able to regenerate from his crown in ''[[Super Princess Peach]]''. He is shown to also have the power to grow in size as seen in ''[[Luigi's Mansion: Dark Moon]]''.
 
In ''[[Luigi's Mansion: Dark Moon]]'', King Boo can open [[paranormal portal]]s to the ghost dimension, create traps such as sand patches, electrify terrain to shock Luigi, grow to large sizes, and teach Boos how to create [[Spirit Ball]]s. His new crown can also shoot an ectoplasmic laser that can shatter the [[Dark Moon]] or trap [[Toad (species)|Toads]] within paintings. King Boo can create illusions, hence his title "The Master of Illusions." In this game, similar to ''Luigi's Mansion'', his power is stronger when there are other Boos in the vicinity.  


[[File:LM3 King Boo Final Battle.png|thumb|left|King Boo can create clones and shoot fireballs from his crown in the final battle of ''Luigi's Mansion 3''.]]
In ''[[Luigi's Mansion: Dark Moon]]'', King Boo exhibits new abilities such as being able to open [[Paranormal Portal]]s (which lead to the ghost dimension), create traps such as sand patches, electrify the terrain to shock Luigi, and teach Boos how to create [[Spirit Ball]]s. His new crown can also shoot an ectoplasmic laser that can shatter the [[Dark Moon]] or trap [[Toad (species)|Toads]] within paintings. King Boo can create illusions, hence his title "The Master of Illusions." His power is also no longer reliant on the presence of other Boos, although it is stronger when there are other Boos in the vicinity.  
In ''Luigi's Mansion 3'', King Boo summons magical paintings to trap people and, to a certain extent, objects inside. He can enlarge portraits in order to capture people, as an extension of his paranormal portals. He does not need the presence of other Boos to grow stronger in this game.


King Boo has a high power stat in many of his spin-off appearances. This is most noticeable in the [[Mario Baseball (series)|''Mario Baseball'' series]], where he is able to hit home runs easily. His great strength is also shown in ''Luigi's Mansion: Dark Moon'', as he summons and makes spike balls fall down simply by slamming the platform.
King Boo appears with a rather high power stat in many of his spin-off appearances. This is most noticeable in the [[Mario Baseball (series)|''Mario Baseball'' series]], where he is able to hit home runs with relative ease. His great strength is also shown in ''Luigi's Mansion: Dark Moon'' as he summons spike balls and makes them fall down, even the larger ones, simply by slamming the platform. King Boo also appears to be a good Alpine Skier, as he states that he is exceptional at that event, though this remains questionable due to his lack of skis (or legs for that manner).


In ''[[Mario & Luigi: Paper Jam]]'', King Boo shapeshifts to trick Mario and Luigi by posing as Paper Mario, and he later briefly transforms into Paper Peach and Paper Bowser. He can also spit blue fireballs.
====Boo leadership====
Although he commands a large band of Boos, not all Boos call King Boo their leader, with some Boos working directly for Bowser, and many others living peacefully with the other denizens of the Mushroom Kingdom, either independently or as part of a small band of Boos led by [[Lady Bow]].


===Relationships===
===Relationships===
====Enemies====
King Boo initially viewed Mario as his main threat, however after his defeat at Luigi's hands during ''Luigi's Mansion'', Luigi has become King Boo's arch-nemesis. Parallels are often drawn between Luigi and King Boo's relationship and Mario and Bowser's. King Boo also hates Professor E. Gadd for his ghost-capturing work, even stating that the only thing that scared him was E. Gadd's invention, the Poltergust 3000. In ''Luigi's Mansion: Dark Moon'', King Boo reveals a desire to get revenge on E. Gadd as well as Luigi, by trapping the scientist within a portrait of his own.  
{{quote|You think I'll let you get away with that!? You're going down this time, Green 'Stache!|King Boo|Luigi's Mansion Arcade}}
King Boo and Luigi are arch-nemeses in the ''Luigi's Mansion'' series. King Boo's motivation for trying to imprison Mario and Luigi is for revenge that both brothers have posed trouble against him in the past. King Boo additionally dislikes Professor E. Gadd for his ghost-capturing hobby, involving capturing his Boos. King Boo additionally states that the only thing that scares him is E. Gadd's invention, the Poltergust 3000. In ''[[Mario Superstar Baseball]]'', King Boo has negative chemistry with Luigi and [[Baby Luigi]]; in ''[[Mario Super Sluggers]]'', he has bad chemistry with Mario, [[Princess Peach]], [[Princess Daisy]], [[Baby Mario]], [[Baby Peach]], [[Baby Daisy]], and [[Yoshi]]. King Boo also traps Toads in ''Luigi's Mansion: Dark Moon'' and captures Princess Peach in ''Luigi's Mansion 3''.
 
Generally speaking, King Boo cares nothing for ghosts that are not Boos, considering them expendable to advance his grand schemes such as in ''Luigi's Mansion: Dark Moon'' where he caused friendly ghosts to turn hostile so he can try to take over Mushroom Kingdom. Even Hellen Gravely, who has great admiration for King Boo, is seen by him as nothing more than a tool for his plans, and he deems her useless as she fails to capture Luigi.
 
====Friends====
[[File:MP9 Bowser Block Battle 15.png|thumb|King Boo assists Bowser by summoning Boos in ''Mario Party 9''.]]
King Boo has been shown to work with Bowser on numerous occasions, including ''Super Mario 64 DS'', ''Mario Party 9'', and ''Super Princess Peach''. He also used a Bowser decoy and the two share a portrait after King Boo's defeat in ''Luigi's Mansion''. Despite this, the two share neutral chemistry in ''Mario Superstar Baseball'' and ''Mario Super Sluggers'', with King Boo appearing on [[Wario]]'s team rather than Bowser's. King Boo has also been paired up with [[Petey Piranha]] in ''Mario Kart: Double Dash!!'', with the two sharing chemistry in the ''Mario Baseball'' games and sharing several statistics in ''Mario Kart 8 Deluxe'' as well as the same CPU vehicle parts, with both acting as rivals for each other upon Petey's inclusion through the ''[[Mario Kart 8 Deluxe - Booster Course Pass|Booster Course Pass]]''. King Boo also has good chemistry with [[Wiggler]] and King K. Rool in ''Mario Super Sluggers''. ''[[Luigi's Mansion 3]]'' shows [[Hellen Gravely]] admiring King Boo, with her releasing him to impress and aid him in his plot for revenge against Luigi. King Boo pays little consideration toward Hellen Gravely and is more interested in capturing Luigi and E. Gadd, making Hellen Gravely's admiration one-sided.


King Boo relies on his Boo minions, or "friends,"<ref>{{cite|quote=I must say...I despise the way you SHWEEERRPP-SHLOOOOP-WHOOORPP-SHLEEEOOORG-vacuumed up all my friends!|author=King Boo|title=''Luigi's Mansion''}}</ref> to cooperate with try to capture Luigi and his friends. In ''[[Mario & Luigi: Paper Jam]]'', he threatens to hurt [[Paper Mario (character)|Paper Mario]] if the Mario Brothers hurt his [[Paper Boo]] minion. He has good [[chemistry]] with the playable Boo in the [[Mario Baseball (series)|''Mario Baseball'' series]]. In ''[[Mario Super Sluggers]]'', King Boo says that he finds little Boos cute. However, in the later ''Luigi's Mansion'' titles, he can be just as cruel to them as he is to his other ghost minions, showing no concern for them being sucked up by Luigi and even actively putting them in harm's way, as well as indirectly calling them useless in ''Luigi's Mansion 3''.
King Boo has been shown to work with Bowser on numerous occasions, including ''Super Mario 64 DS'', ''Mario Party 9'' and ''Super Princess Peach''. He also used a Bowser decoy and the two shared a portrait after King Boo's defeat in ''Luigi's Mansion''. Despite their apparent alliance, the two share neutral chemistry in ''[[Mario Superstar Baseball]]'' and ''[[Mario Super Sluggers]]'', with King Boo appearing on [[Wario]]'s team, rather than Bowser's. King Boo has also been paired up with [[Petey Piranha]] as in ''Mario Kart: Double Dash!!'', with the two sharing chemistry in the ''Baseball'' games, although their relationship has never been fully explored.


==Quotes==
==Quotes==
{{main|List of King Boo quotes}}
*''"White gloves! A cute little moustache! Soft shoes! How did you get out of my...? ... Huh? Wait just a second... Your clothes are... green... Hey, you must be Luigi! Whoa, you had me a bit confused for a moment there!"'' - ''[[Luigi's Mansion]]''
*"''Aahh, I could just stare at my Mario painting for hours! It's true what they say about fine art...it takes utterly refined sensibilities to truly appreciate it! The way you plead for help, Mario... I find it so...satisfying. Perhaps that is merely because I remember how much trouble you've caused me in the past. ... Seriously, though, who would actually believe that mansions get given away in contests?! Talk about stupid! What do they feed you Mario brothers anyway...gullible soup? Your brother came all this way just to get turned into a painting... It's just terrific. However... This Mario painting looks lonely... I must have a Luigi painting as well! Then my gallery will truly be complete! Bleah HA HA! I am not afraid of you, fool! I fear only that infernal Poltergust 3000 you carry on your back! Stupid machine! But I am a KING among Boos! I swear it... I shall fear no mere house-cleaning device!! I must say...I despise the way you SHWEEERRPP-SHLOOOOP-WHOOORPP-SHLEEEOOORG-vacuumed up all my friends! Don't imagine that I'll flee... I'll fight you like a true Boo! Now join your brother... ...inside the painting!''" - ''[[Luigi's Mansion]]''
*''"What? You want me to release Mario? Riiiiight."'' - ''Luigi's Mansion''
*"''Bah! You don't have enough coins! King Boo says boo to you! And good-bye!!!''" - ''[[Mario Party 8]]''
*''"Seriously, though, who would actually believe that mansions would be given away in contests!? Talk about stupid!"'' - ''Luigi's Mansion''
*"''Say WHAT? You want ME to help YOOOOOU?''" - ''[[Mario Super Sluggers]]''
*''"What should we do, Boos? Good idea guys! We'll blow him away! We'll take a big Boo breath, ... And blow [[Luigi|you]] away!!!"'' - ''[[Luigi's Mansion]]''
*"''Heh heh heh! I saw that Alpine Downhill event of yours yesterday! Looks like you need to take a lesson in speed from ME! And that lesson starts today! I challenge you to an Alpine Downhill match! Hee hee hee!''" - ''[[Mario & Sonic at the Olympic Winter Games (Wii)|Mario & Sonic at the Olympic Winter Games]]'' (Wii)
*''"Now who do we have here? Why, if it isn't my old pal Luigi! Or is it Baby Luigi? I can't tell the difference. Hey, remember that time when you trapped me in a painting for all eternity? Good times. But guess what? I GOT OUT! And now I'm painting the town RED!"'' - ''[[Luigi's Mansion: Dark Moon]]''
*"''...Hmm? One-two-three-four-five-six-sev-- WAIT! There should be seven! Who's missing!? [...] Luigi! What are you doing over there?! UGH! That's it! I'm sick to double death of you! You want to fight me? FINE! Let's go, Luigi! This is the end for you, once and for all! HERE I COME!''" - ''[[Luigi's Mansion 3]]''
*''"Yes, it was I who broke the [[Dark Moon]]! This power-enhancing jeweled crown of mine made it easy. And now that all the ghosts of [[Evershade Valley]] are under my control, it's time to take my rightful place as the supreme ruler of your world! [[Luigi|You]], [[Professor Elvin Gadd|that annoying scientist]], and all your friends will look great hanging on the wall of my throne room!"'' - ''Luigi's Mansion: Dark Moon''
*''"Gwahaha! If it isn't my good friend, Luigi! It's me, your ol' pal KING BOO! Y-You're not telling me you FORGOT ME!? Well, I certainly haven't forgotten YOU! You, that ratty vacuum cleaner, and that stinky old geezer who made it! I haven't forgiven what you did to me, so I've led the ghosts here in an uprising! But you... you and that DISGUSTING machine just SHLEEEERP-SHWOOOOOP-SWHLOOORPSHLOOOORP-SHWEEEERPed them all up! You think I'll let you get away with that!? You're going down this time, Green 'Stache!"'' - ''Luigi's Mansion Arcade''


==Voice samples==
==Official profiles and statistics==
{{media table
{{main|List of King Boo profiles and statistics}}
|file1=King Boo's laugh 2004.oga
===''[[Mario Kart: Double Dash!!]]''===
|title1=''[[Super Mario 64 DS]]''
'''Website Bio:''' ''If you're not afraid of ghosts, you will be once King Boo is through with you. To unlock him, finish the Mirror Mode Star Cup with a 1st place win.''
|description1=King Boo's laughter
}}


==Profiles and statistics==
===''[[Luigi's Mansion: Dark Moon]]''===
{{main|List of King Boo profiles and statistics}}
*'''Website Bios''':
**[[File:Flag of USA.png|22px]] ''The orchestrator of the Dark Moon debacle is as regal as he is round...Can you bring peace back to Evershade Valley?''
**[[File:Flag of Europe.png|22px]] ''This spooky sovereign shattered the Dark Moon, causing the ghosts to turn mischievous. Piece the Dark Moon back together and restore peace to Evershade Valley!''


==List of appearances==
==Game appearances==
{|class="wikitable sortable" width=100%
{| class=sortable cellspacing=0 cellpadding=3 border=1 align=center width=100% style="border-collapse:collapse; font-family:Arial"
|-
|-
!width=40%|Title
!width=50% | Title
!width=20%|Description
!width=20% | Description
!width=20%|Release date
!width=20% | Release Date
!width=20%|System/format
!width=10% | System/Format
|-
|-
|''[[Luigi's Mansion]]''
|''[[Luigi's Mansion]]''
|Main antagonist, final boss
|Main Antagonist, Final Boss
|2001
|2001
|[[Nintendo GameCube]]
|[[Nintendo GameCube]]
|-
|-
|''[[Mario Kart: Double Dash!!]]''
|''[[Mario Kart: Double Dash!!]]''
|Unlockable playable character
|Unlockable Playable Character
|2003
|2003
|Nintendo GameCube
|Nintendo GameCube
|-
|-
|''[[Super Mario 64 DS]]''
|''[[Super Mario 64 DS]]''
|Boss
|Boss  
|2004
|2004
|[[Nintendo DS]]
|[[Nintendo DS]]
|-
|-
|''[[Mario Superstar Baseball]]''
|''[[Mario Superstar Baseball]]''
|Playable character
|Playable Character
|2005
|2005
|Nintendo GameCube
|Nintendo GameCube
|-
|-
|''[[Super Princess Peach]]''
|''[[Super Princess Peach]]''
|Boss
|Boss  
|2005
|2005
|Nintendo DS
|Nintendo DS
|-  
|-  
|''[[Mario Kart DS]]''
|''[[Mario Kart DS]]''
|Boss
|Boss  
|2005
|2005
|Nintendo DS
|Nintendo DS
|-
|-
|''[[Mario Party 8]]''
|''[[Mario Party 8]]''
|Non-playable character
|Non-Playable Character
|2007
|2007
|[[Wii]]
|[[Wii]]
Line 309: Line 269:
|-
|-
|''[[Mario Kart Wii]]''
|''[[Mario Kart Wii]]''
|Unlockable playable character
|Unlockable Playable Character
|2008
|2008
|Wii
|Wii
|-
|-
|''[[Mario Super Sluggers]]''  
|''[[Mario Super Sluggers]]''  
|Playable character
|Playable Character
|2008
|2008
|Wii
|Wii
Line 339: Line 299:
|-
|-
|''[[Mario Party 9]]''
|''[[Mario Party 9]]''
|Boss
|Boss  
|2012
|2012
|Wii
|Wii
|-
|-
|''[[Luigi's Mansion: Dark Moon]]''
|''[[Luigi's Mansion: Dark Moon]]''
|Main antagonist, final boss
|Main Antagonist, Final Boss
|2013
|2013
|Nintendo 3DS
|Nintendo 3DS
Line 359: Line 319:
|-
|-
|''[[Mario Golf: World Tour]]''
|''[[Mario Golf: World Tour]]''
|Non-playable character/cameo
|Non-Playable Character/Cameo
|2014
|2014
|Nintendo 3DS
|Nintendo 3DS
|-
|-
|''[[Super Smash Bros. for Nintendo 3DS]]''
|''[[Super Smash Bros. for Nintendo 3DS]]''
|Trophy
|Non-Playable Character/Cameo
|2014
|2014
|Nintendo 3DS
|Nintendo 3DS
|-
|-
|''[[Mario Party 10]]''
|''[[Mario Party 10]]''
|Boss
|Boss  
|2015
|2015
|Wii U
|Wii U
|-
|-
|''[[Puzzle & Dragons: Super Mario Bros. Edition]]''
|''[[Puzzle & Dragons: Super Mario Bros. Edition]]''
|Boss
|Boss  
|2015
|2015
|Nintendo 3DS
|Nintendo 3DS
|-
|-
|''[[Mario & Luigi: Paper Jam]]''
|''[[Mario & Luigi: Paper Jam]]''
|Boss
|Boss  
|2015
|2015
|Nintendo 3DS
|Nintendo 3DS
|-
|-
|''[[Luigi's Mansion Arcade]]''
|''[[Luigi Mansion Arcade|Luigi's Mansion Arcade]]
|Main antagonist, final boss
|Main Antagonist, Final Boss
|2015
|2015
|Arcade
|Arcade
|-
|-
|''[[Mario Party: Star Rush]]''
|''[[Mario Party: Star Rush]]''
|Boss
|Boss  
|2016
|2016
|Nintendo 3DS
|Nintendo 3DS
|-
|-
|''[[Mario Kart 8 Deluxe]]''
|''[[Mario Kart 8 Deluxe]]''
|Playable character
|Playable Character
|2017
|2017
|[[Nintendo Switch]]
|[[Nintendo Switch]]
|-
|''[[Mario Kart Arcade GP DX]]''
|Playable character <small>(during a limited-time event)</small><br>Unlockable playable character <small>(for permanent use, through a limited-time event)</small>
|2017
|Arcade
|-
|''[[Mario + Rabbids Kingdom Battle]]''
|Cameo
|2017
|Nintendo Switch
|-
|''[[Mario Tennis Aces]]'' (version 2.0.0)
|Boss
|2018
|Nintendo Switch
|-
|''[[Luigi's Mansion (Nintendo 3DS)|Luigi's Mansion]]''
|Main antagonist, final boss
|2018
|Nintendo 3DS
|-
|''[[Super Smash Bros. Ultimate]]''
|Spirit
|2018
|Nintendo Switch
|-
|''[[New Super Mario Bros. U Deluxe]]''
|Cameo
|2019
|Nintendo Switch
|-
|''[[Dr. Mario World]]''
|Assistant (update)
|2019
|iOS / Android
|-
|''[[Mario Kart Tour]]''
|Unlockable playable character (update)
|2019
|iOS / Android
|-
|''[[Tetris 99]]''
|Cameo in TETRIS x Luigi's Mansion 3 Event
|2019
|Nintendo Switch
|-
|''[[Luigi's Mansion 3]]''
|Main antagonist, final boss
|2019
|Nintendo Switch
|-
|''[[Mario Party Superstars]]''
|Non-playable character
|2021
|Nintendo Switch
|-
|''[[Mario Kart Live: Home Circuit]]'' (version 2.0.0)
|Non-playable character
|2021
|Nintendo Switch
|-
|''[[Super Mario Bros. Wonder]]''
|Enemy
|2023
|Nintendo Switch
|-
|''[[Luigi's Mansion 2 HD]]''
|Main antagonist, final boss
|2024
|Nintendo Switch
|-
|''[[Super Mario Run]]'' (version 3.2.0)
|Cameo
|2024
|iOS, Android
|-
|''[[Super Mario Party Jamboree]]''
|Cameo
|2024
|Nintendo Switch
|}
|}


==Gallery==
==Gallery==
{{main-gallery|King Boo}}
{{morepic|King Boo}}
<gallery>
<gallery>
LuigisMansionKingBooModel.png|''[[Luigi's Mansion]]''
King Boo Artwork MSS.PNG|''[[Mario Super Sluggers]]''
King Boo MKDD Model.png|''[[Mario Kart: Double Dash!!]]''
King Boo Artwork - Luigi's Mansion Dark Moon.png|''[[Luigi's Mansion: Dark Moon]]''
KingBooSelectMSB.PNG|''[[Mario Superstar Baseball]]
SPP-King Boo Sprite.PNG|''[[Super Princess Peach]]''
King Boo ArcadeGP2.png|''[[Mario Kart Arcade GP 2]]''
King Boo ArcadeGP2.png|''[[Mario Kart Arcade GP 2]]''
SPP-King Boo Sprite.png|''[[Super Princess Peach]]''
MP9 King Boo Bust.png|''[[Mario Party 9]]''
MKT Artwork KingBooLuigisMansion.png|''[[Mario Kart Tour]]''
</gallery>
</gallery>


==Names in other languages==
==Names in other languages==
<!--To edit this table, access the "List of King Boo names in other languages" page and go to the "King Boo" section.-->
{{Foreignname
{{main|List of King Boo names in other languages}}
|Jap=キングテレサ
{{:List of King Boo names in other languages|transcludesection=King Boo}}
|JapR=Kingu Teresa
|JapM=King Boo
|Ger=König Buu Huu<br/>König Boo (''Mario Kart DS'')
|GerM=King Boo Hoo<br>King Boo
|Dut=King Boo
|DutM=-
|SpaA=Rey Bú
|SpaAM=King Boo
|SpaE=Rey Boo
|SpaEM=King Boo
|Ita=Re Boo
|ItaM=King Boo
|Fra=Roi Boo
|FraM=King Boo
|Por=Rei Bu
|PorM=King Boo
|Rus=Бу-король
|RusR=Bu-korol'
|RusM=King Boo
|Kor=킹부끄
|KorR=King Bukkeu
|KorM=King Boo, "''bukkeu''" comes from "''bukkeubukkeu''", Korean onomatopoeia for being shy
|Chi=害羞幽靈王<br>''Hàixiū yōulíng wáng''<br>嘘嘘鬼王<br>''Xūxū guǐwáng''
|ChiM=King Shy Ghost
}}


==Trivia==
==Trivia==
*When King Boo says, "''I will not give up my favorite decoration. I like Mario just where he is,''" he references a quote from {{wp|Jabba the Hutt}} in ''{{wp|Return of the Jedi|Star Wars Episode VI: Return of the Jedi}}''.<ref>{{cite|quote=I will not give up my favorite decoration. I like {{wp|Han Solo|Captain Solo}} where he is.|author=Jabba the Hutt|title=''Star Wars Episode VI: Return of the Jedi''|publisher=Lucasfilms|date=1983|language=en}}</ref>
*When King Boo says, ''"I don't plan to give up my favorite decoration. I like Mario where he is."'', he references a quote from ''[[wikipedia:Star Wars VI: Return of the Jedi|Star Wars VI: Return of the Jedi]]'', when [[wikipedia:Jabba the Hutt|Jabba the Hutt]] says, ''"I don't plan to give up my favorite decoration. I like [[wikipedia:Han Solo|Captain Solo]] where he is."''
*King Boo's laugh originating from ''Luigi's Mansion'' is actually a pitched-up version of a stock laughing sound effect.<ref>{{cite|url=soundeffects.fandom.com/wiki/Sound_Ideas,_CARTOON,_LAUGHTER_-_LOW,_THROATY_LAUGH,_HUMAN_01|title=Sound Ideas, CARTOON, LAUGHTER - LOW, THROATY LAUGH, HUMAN 01|publisher=Soundeffects Wiki|accessdate=October 10, 2022}}.</ref> A pitched-down version of the same effect was previously used for [[Bleak]].
*King Boo is one of the three characters who appears as a rival in ''Mario & Sonic at the London 2012 Olympic Games'' but doesn't appear as a playable character in ''Mario & Sonic at the Rio 2016 Olympic Games.'' The other two are Boo and Magikoopa.


==References==
==References==
<references/>
<references/>
 
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[[Category:Boos]]
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[[Category:Shapeshifters]]
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[[Category:Mario & Sonic at the London 2012 Olympic Games characters]]
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[[Category:Mario Party 10]]
[[Category:Mario Party 9 bosses]]
[[Category:Mario Party Characters]]
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[[Category:Mario Party Series Bosses]]
[[Category:Mario Party: Star Rush bosses]]
[[Category:Mario Superstar Baseball Characters]]
[[Category:Mario Party Superstars characters]]
[[Category:Mario Super Sluggers Playable Characters]]
[[Category:Mario Superstar Baseball characters]]
[[Category:Super Princess Peach Bosses]]
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[[Category:Super Mario Bros. Wonder enemies]]
[[Category:Super Mario-kun characters]]
[[Category:Super Mario 64 bosses]]
[[Category:Super Princess Peach bosses]]
[[Category:Super Smash Bros. for Nintendo 3DS trophies]]
[[Category:Super Smash Bros. Ultimate spirits]]
[[Category:The Super Mario Bros. Movie characters]]
[[de:König Buu Huu]]
[[de:König Buu Huu]]
[[it:Re Boo]]
[[it:Re Boo]]

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