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The neurotransmitter must be in his mask. If we get the mask, he can't control the bots. Game over.
―Hiro Hamada

Yokai's Mask was a mask worn by robotics expert Professor Robert Callaghan while under the supervillain alias Yokai. It was a white mask with red markings and yellow eyes, giving it a sinister Kabuki appearance. It was equipped with a neurotransmitter, giving Yokai the ability to control the Microbots. Without the mask, Yokai would lose control of the Microbots.

During a scuffle between Yokai and the Big Hero 6 team (consisting of Hiro Hamada, Baymax, and Hiro's friends who were Callaghan's pupils) at what used to be a testing facility (owned by Alistair Krei) on Akuma Island, Hiro managed to remove the mask, and Yokai was revealed to be Callaghan. Callaghan demanded Hiro give him back the mask, to which Hiro responded by corrupting Baymax and ordering him to terminate Callaghan. As rest of the team attempted to stop Baymax from committing murder, the professor retrieved the mask and escaped with the Microbots.

In the final battle against Yokai, the Big Hero 6 team initially aimed for the mask, but Callaghan proved to be unstoppable due to his control of the Microbots, so Hiro had to come up with a plan to strip Callaghan of his power. After the Microbots were eliminated, the mask was finally destroyed by Hiro and Baymax, thus causing Callaghan to permanently lose control of the Microbots.


v - e - d
Big Hero 6 logo
Media
Films and Television: Big Hero 6Big Hero 6: The Series

Books: MangaBig Hero 6 Big Golden Book Big Hero 6 Little Golden BookBig Hero 6 Chapter BookBig Hero 6 Junior NovelizationBig Hero 6 Pictureback with TattoosBig Hero 6 Step Into ReadingBig Hero 6 Deluxe Step into ReadingThe Art of Big Hero 6Big Hero 6 Ultimate Sticker BookBig Hero 6: Hiro and Tadashi
Video games: Big Hero 6: Battle in the BayBig Hero 6: Bot FightDisney INFINITY seriesBig Hero 6: Baymax BlastKingdom Hearts IIIDisney Crossy Road
Music: Soundtrack

Disney Parks
Big Hero 6 HeadquartersBig Hero 6 Ride

Entertainment: Baymax Super Exercise Expo

Characters
Film characters: Hiro HamadaBaymaxTadashi HamadaGo Go TomagoHoney LemonWasabiFredAunt CassRobert Callaghan/YokaiAbigail CallaghanAlistair KreiSergeant GersonMochiMr. YamaFred's FatherHeathcliff

Television Characters: Professor GranvilleObake
Deleted characters: The Fujitas

Organizations
Big Hero 6 (team)
Locations
San FransokyoLucky Cat CaféSan Fransokyo Institute of TechnologyAkuma Island
Objects
MicrobotsMegabotBaymax's ChipYokai's MaskLittle YamaSilent Sparrow
Songs
StoryMy Songs Know What You Did in the Dark (Light Em Up)Top of the World (Greek Fire)Immortals


v - e - d
Disney-Infinity
Games
Disney INFINITYDisney INFINITY: 2.0 EditionDisney INFINITY: 3.0 Edition
Playable Characters
Disney INFINITY: Jack SparrowMr. IncredibleSulleySorcerer MickeyLightning McQueenWoodyMaterBuzz LightyearMike WazowskiRandall BoggsHector BarbossaDavy JonesHelen ParrDash ParrViolet ParrSyndromeJohn ReidTontoJack SkellingtonPhineas FlynnPerry the PlatypusJessieWreck-It RalphVanellope von SchweetzRapunzelElsaAnnaHolley ShiftwellFrancesco Bernoulli

Disney INFINITY: 2.0 Edition: Iron ManCaptain AmericaHulkBlack WidowThor OdinsonHawkeyeNick FuryLoki LaufeysonMaleficentMeridaSpider-ManVenomIron FistNovaGreen GoblinRocket RaccoonGrootStar-LordGamoraDrax the DestroyerStitchTinker BellAladdinJasmineDonald DuckBaymaxHiro HamadaFalconYonduSam FlynnQuorra
Disney INFINITY: 3.0 Edition: YodaUltronLuke SkywalkerFa MulanAnakin SkywalkerLeia OrganaHan SoloAhsoka TanoDarth VaderDarth MaulObi-Wan KenobiFinnReyPoe DameronKylo RenJoySadnessAngerFearDisgustMinnie MouseOlafChewbaccaHulkbuster Iron ManEzra BridgerKanan JarrusGarazeb OrreliosSabine WrenBoba FettSpotJudy HoppsNick WildePeter PanBalooCaptain America - The First AvengerBlack PantherVisionAnt-ManAliceMad HatterTimeDory

Non-Playable Characters
Disney INFINITY: HammRexSlinky DogEmperor ZurgJoshamee GibbsPintel and RagettiEdna ModeRick DickerMirageLuigiRamoneFloChick HicksThe KingGuidoFinn McMissileCarla VelosoTractorsArtScott "Squishy" SquibblesTerri and Terry PerryDon Carlton

Disney INFINITY: 2.0 Edition: WaspCaptain MarvelAnt-Man (Hank Pym)SifMODOKFrost GiantsIron PatriotWinter SoldierMysterioDoctor OctopusBlack CatWhite TigerPower ManJ. Jonah JamesonCosmo the SpacedogThe CollectorThe WitchPleakleyGolden Harp
Disney INFINITY: 3.0 Edition: R2-D2C-3POJabba the HuttJar Jar BinksMace WinduPadmé AmidalaKing CandyMarshmallowYokaiBattle DroidsMarlinBruceAnglerfishSeagullsHankDestinyBaileyJellyfish

Objects
Cruella's carRatcatcherPumpkin CoachLightsaberDarkwing Duck's gas gunBlack PearlIdentity DiscPlasma Cannon Mark ICandy KartKing Candy's Royal RacerPizza Planet truckRecognizerLight RunnerPixar BallThe Jolly Roger (Disney Parks version) • The Electric Mayhem BusBaseball Launcher