King Boo
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- “But I am a KING among Boos! I swear it, I shall fear no mere house-cleaning device!”
- —King Boo, Luigi's Mansion
King Boo is the leader of the Boos 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
Luigi's Mansion series
Luigi's Mansion
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 his lab in Boo Woods. This angered King Boo, so he devised a plan to rescue Boolossus.
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 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.
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.
The special key that Vincent Van Gore holds unlocks the path to the Secret Altar. However, he is locked in the 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.
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 an illusion of Bowser that King Boo controls from the inside and uses as a shield.
King Boo uses this Bowser illusion 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 illusion 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 illusion Bowser's mouth. This attack blasts the head off of the illusion Bowser, causing King Boo to exit the illusion shield and expose himself to the Poltergust 3000. Luigi begins to deplete the ghost's five hundred hit points. Meanwhile, the illusion'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 illusion reattaches backwards whenever he returns to the Bowser body, causing the illusion Bowser to run around aimlessly. The illusion 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 Bowser illusion. With King Boo captured, Professor E. Gadd hangs his new portrait in an empty room in his gallery.
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. Appearance-wise, he is much similar to his 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 he is also much larger.
It is revealed later in the game that 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.
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, 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.
Super Mario-Kun
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.
Super Mario series
Super Mario Sunshine
- Main article: King Boo (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.
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).
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.
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 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.
New Super Luigi U
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[1].
Mario Kart series
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. His appearance in this game results in his frequent appearances in the Mario Kart series, as he appears in Mario Kart DS as a boss and in Mario Kart Wii as a playable character again. 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 any other character's special item (if they are going to get a special item, it is randomly chosen, based on their race position).
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.
When partnered with Petey Piranha, King Boo appears much smaller than he does when partnered with another character. 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.
Mario Kart DS
In Mario Kart DS, King Boo, along with six other bosses from Super Mario 64 DS, appears as one of the bosses of the Mission Mode. King Boo is the boss of the fourth level, with the playable character being Peach. Peach attempts to collect fifty 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. 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.
Mario Kart Arcade GP 2
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.
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 SNES Ghost Valley 2 course. In the credits, he appears driving the Jetsetter on the SNES Ghost Valley 2 course.
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 Birdo, whose bow was made larger, Wario, who now has short sleeves, Waluigi, who, when selected, does something somewhat different from what he did before, and Donkey Kong, who does not have his mouth as wide open as before while looking in another direction.
Mario Baseball series
Mario Superstar Baseball
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
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. 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 Boos 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.
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 colours of the jewels on his crown are reversed.
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 fireballs at Peach. 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 8
King Boo makes his first appearance in a Mario Party game in Mario Party 8. He gives out Stars 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 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 
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
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 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.
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 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
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.
Mario & Sonic series
Mario & Sonic at the Olympic Winter Games
In the 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 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 or Toad) says that it is unfair because King Boo has no skis.
In the Adventure Tours mode in the 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
King Boo appears in the next installment of the Mario & Sonic series, Mario and Sonic at the London 2012 Olympic Games. In the 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.
In the 3DS version, King Boo teams up with a Boo to face Sonic and Tails in the Badminton Doubles event. After winning, the player completes Sonic's second episode.
Mario & Sonic at the Sochi 2014 Olympic Winter Games
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
King Boo makes a cameo appearance in Mario Golf: World Tour on Hole 4 of Bowser's Castle. He is floating in the background alongside other Boos, and he is also much larger than in other games. His name can also appear on the tournament scoreboard.
Puzzle & Dragons: Super Mario Bros. Edition
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.
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.
When King Boo attacks, a bunch of Boos attack with him.
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 Mushrooms on a Big Boo.
Mario & Luigi: Paper Jam
King Boo appears as a boss in Mario & Luigi: Paper Jam, making his official Mario & Luigi series debut. He is encountered and fought in Gloomy Woods after the trio separate, leading to him kidnapping and briefly impersonating Paper Mario. The real Paper Mario is initially unable to aid the brothers in the fight, as he is held captive by Paper Boos. He also has a papercraft version of him as a boss controlled by Morton and Lemmy.
One of his attacks is a reference (if not a direct copy) of one of the Dark Star's attacks in Mario & Luigi: Bowser's Inside Story, in which he will split apart into five copies, and slowly float towards the Trio, turning invisible as he gets near. The trio must counter this with their hammers exactly two seconds after a copy turns invisible.
General information
Physical appearance
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 as well as a white body. 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.
Personality
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 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.
Powers and Abilities
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.
In Luigi's Mansion: Dark Moon, King Boo exhibits new abilities such as being able to open Paranormal Portals (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 Balls. His new crown can also shoot an ectoplasmic laser that can shatter the Dark Moon or trap 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.
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, 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).
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
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.
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
- "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
- "What? You want me to release Mario? Riiiiight." - Luigi's Mansion
- "Seriously, though, who would actually believe that mansions would be given away in contests!? Talk about stupid!" - Luigi's Mansion
- "What should we do, Boos? Good idea guys! We'll blow him away! We'll take a big Boo breath, ... And blow you away!!!" - Luigi's Mansion
- "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
- "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! You, that annoying scientist, and all your friends will look great hanging on the wall of my throne room!" - Luigi's Mansion: Dark Moon
Official profiles and statistics
- Main article: List of King Boo profiles and statistics
Mario Kart: Double Dash!!
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.
Luigi's Mansion: Dark Moon
- Website Bios:
The orchestrator of the Dark Moon debacle is as regal as he is round...Can you bring peace back to Evershade Valley?
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!
Game appearances
| Title | Description | Release Date | System/Format |
|---|---|---|---|
| Luigi's Mansion | Main Antagonist, Final Boss | 2001 | Nintendo GameCube |
| Mario Kart: Double Dash!! | Unlockable Playable Character | 2003 | Nintendo GameCube |
| Super Mario 64 DS | Boss | 2004 | Nintendo DS |
| Mario Superstar Baseball | Playable Character | 2005 | Nintendo GameCube |
| Super Princess Peach | Boss | 2005 | Nintendo DS |
| Mario Kart DS | Boss | 2005 | Nintendo DS |
| Mario Party 8 | Non-Playable Character | 2007 | Wii |
| Mario Kart Arcade GP 2 | Cameo | 2007 | Arcade |
| Mario Kart Wii | Unlockable Playable Character | 2008 | Wii |
| Mario Super Sluggers | Playable Character | 2008 | Wii |
| Mario & Sonic at the Olympic Winter Games | Rival | 2009 | Nintendo DS |
| Mario & Sonic at the Olympic Winter Games | Rival | 2009 | Wii |
| Mario & Sonic at the London 2012 Olympic Games | Rival | 2011 | Wii |
| Mario & Sonic at the London 2012 Olympic Games | Rival | 2012 | Nintendo 3DS |
| Mario Party 9 | Boss | 2012 | Wii |
| Luigi's Mansion: Dark Moon | Main Antagonist, Final Boss | 2013 | Nintendo 3DS |
| New Super Luigi U | Cameo | 2013 | Wii U |
| Mario & Sonic at the Sochi 2014 Olympic Winter Games | Rival | 2013 | Wii U |
| Mario Golf: World Tour | Non-Playable Character/Cameo | 2014 | Nintendo 3DS |
| Super Smash Bros. for Nintendo 3DS | Non-Playable Character/Cameo | 2014 | Nintendo 3DS |
| Mario Party 10 | Boss | 2015 | Wii U |
| Puzzle & Dragons: Super Mario Bros. Edition | Boss | 2015 | Nintendo 3DS |
| Mario & Luigi: Paper Jam | Boss | 2015 | Nintendo 3DS |
Gallery
- KingBooSelectMSB.PNG
Mario Party 8
Mario Kart Wii
- SNESGhostValley22-MKWii.png
Mario Kart Wii
- SPP-King Boo Sprite.PNG
Names in other languages
Trivia
- 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 Star Wars VI: Return of the Jedi, when Jabba the Hutt says, "I don't plan to give up my favorite decoration. I like Captain Solo where he is."
References
- Boos
- Portrait Ghosts
- Koopa Troop
- Kings
- Royalty
- Undead
- Villains
- Unlockables
- Final Bosses
- Bosses
- Characters
- Playable Characters
- Mario Kart DS Characters
- Mario Kart Series Playable Characters
- Mario Kart Wii Characters
- Mario Kart: Double Dash!! Characters
- Mario Party 8
- Mario Party 9
- Mario Party 10
- Mario Party Characters
- Mario Party Series Bosses
- Mario Superstar Baseball Characters
- Super Princess Peach Bosses
