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** When another Halloween comes around again in the comic book continuation, Elisa keeps a theme by being [[WesternAnimation/{{Aladdin}} Princess Jasmine]] and Goliath once again doesn't bother. Neither does Delilah, who, not knowing better, explains what she ''really'' is when asked; "dressing up" as a DNA mashup of both Goliath's ex Demona and Elisa, his current love interest, causes ''quite'' the awkward moment. Meanwhile, Angela, Broadway, Lexington and Brooklyn go as [[Film/TheWizardOfOz Dorothy Gale, the Cowardly Lion]], a cyborg and [[ComicBook/{{Superman}} Supergoyle]], respectively.
to:
** When another Halloween comes around again in the comic book continuation, Elisa keeps a theme by being [[WesternAnimation/{{Aladdin}} Princess Jasmine]] and Goliath once again doesn't bother. Neither does Delilah, who, not knowing better, explains what she ''really'' is when asked; "dressing up" as a DNA mashup of both Goliath's ex Demona and Elisa, his current love interest, causes ''quite'' the awkward moment. Meanwhile, Angela, Broadway, Lexington and Brooklyn go as [[Film/TheWizardOfOz Dorothy Gale, the Cowardly Lion]], a cyborg and [[ComicBook/{{Superman}} Supergoyle]], respectively.
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* ''WesternAnimation/TheUnstoppableYellowYeti'': In "Gotta Get Goosey", Gustav goes sans disguise to audition as the yeti mascot for Winterton's hosting of the Winter Olympics.
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* ''WesternAnimation/MenInBlack: The Series'': In "The Jack-O-Lantern Syndrome", Halloween is a favorite holiday of aliens living on Earth, though instead of going as themselves, they often dress up as a different alien species.
to:
* ''WesternAnimation/MenInBlack: The Series'': ''WesternAnimation/MenInBlackTheSeries'': In "The Jack-O-Lantern Syndrome", Halloween is a favorite holiday of aliens living on Earth, though instead of going as themselves, they often dress up as a different alien species.
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** The following year (shown in the Dynamite comics' Halloween Special) somewhat subverts this, as the gargoyles have by this point had their existence exposed for a while and had recently made some progress in public acceptance of them, and so most of the clan attends the Greenwich Village party by invitation, no longer needing to pass off their nature as costumes (several of them do still dress up anyway, while Elisa continues her theme this year as [[WesternAnimation/AliceInWonderland Alice]]). The clan's youngest member, Nashville, still plays the trope straight when going trick-or-treating, but also somewhat subverts it in that he insists he's ''not'' wearing a UsefulNotes/{{Blackbeard}} costume over a gargoyle "costume"; rather, Blackbeard ''[[BeethovenWasAnAlienSpy was]]'' a gargoyle, so he's being historically accurate.
to:
** The following year (shown in the Dynamite comics' Halloween Special) somewhat subverts this, as the gargoyles have by this point had their existence exposed for a while and had recently made some progress in public acceptance of them, and so most of the clan attends the Greenwich Village party by invitation, no longer needing to pass off their nature as costumes (several of them do still dress up anyway, while Elisa continues her theme this year as [[WesternAnimation/AliceInWonderland Alice]]). The clan's youngest member, Nashville, still plays the trope straight when going trick-or-treating, but also somewhat subverts it in that he insists he's ''not'' wearing a UsefulNotes/{{Blackbeard}} costume over ''over'' a gargoyle "costume"; rather, Blackbeard ''[[BeethovenWasAnAlienSpy was]]'' a gargoyle, so he's being historically accurate.
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** The Gargoyles love Halloween for just this reason. The younger gargoyles, getting into the spirit of the holiday, wear actual costumes (such as a pirate outfit) and are complimented on wearing "a costume over a costume". Goliath, meanwhile, goes out as himself with Elisa (who goes as [[WesternAnimation/BeautyAndTheBeast Belle]], both as a ShoutOut, and because their relationship is also BeastAndBeauty). Apparently the fact that he's 6'10" passes unremarked upon as part of his "costume".
** When another Halloween comes around again in the comic book continuation, Elisa keeps a theme by being [[WesternAnimation/{{Aladdin}} Princess Jasmine]] and Goliath once again doesn't bother. Neither does Delilah, who, not knowing better, explains what she ''really'' is when asked; "dressing up" as a DNA mashup of both Goliath's ex Demona and Elisa, his current love interest, causes ''quite'' the awkward moment. Meanwhile, Angela, Broadway, Lexington and Brooklyn go as Dorothy Gale, the Cowardly Lion, a cyborg and [[ComicBook/{{Superman}} Supergoyle]], respectively.
** When another Halloween comes around again in the comic book continuation, Elisa keeps a theme by being [[WesternAnimation/{{Aladdin}} Princess Jasmine]] and Goliath once again doesn't bother. Neither does Delilah, who, not knowing better, explains what she ''really'' is when asked; "dressing up" as a DNA mashup of both Goliath's ex Demona and Elisa, his current love interest, causes ''quite'' the awkward moment. Meanwhile, Angela, Broadway, Lexington and Brooklyn go as Dorothy Gale, the Cowardly Lion, a cyborg and [[ComicBook/{{Superman}} Supergoyle]], respectively.
to:
** The Gargoyles gargoyles love Halloween for just this reason. The younger gargoyles, getting into the spirit of the holiday, wear actual costumes (such as a pirate outfit) and are complimented on wearing "a costume over a costume". Goliath, meanwhile, goes out as himself with Elisa (who goes as [[WesternAnimation/BeautyAndTheBeast Belle]], both as a ShoutOut, and because their relationship is also BeastAndBeauty). Apparently the fact that he's 6'10" passes unremarked upon as part of his "costume".
** When another Halloween comes around again in the comic book continuation, Elisa keeps a theme by being [[WesternAnimation/{{Aladdin}} Princess Jasmine]] and Goliath once again doesn't bother. Neither does Delilah, who, not knowing better, explains what she ''really'' is when asked; "dressing up" as a DNA mashup of both Goliath's ex Demona and Elisa, his current love interest, causes ''quite'' the awkward moment. Meanwhile, Angela, Broadway, Lexington and Brooklyn go as [[Film/TheWizardOfOz Dorothy Gale, the CowardlyLion, Lion]], a cyborg and [[ComicBook/{{Superman}} Supergoyle]], respectively.respectively.
** The following year (shown in the Dynamite comics' Halloween Special) somewhat subverts this, as the gargoyles have by this point had their existence exposed for a while and had recently made some progress in public acceptance of them, and so most of the clan attends the Greenwich Village party by invitation, no longer needing to pass off their nature as costumes (several of them do still dress up anyway, while Elisa continues her theme this year as [[WesternAnimation/AliceInWonderland Alice]]). The clan's youngest member, Nashville, still plays the trope straight when going trick-or-treating, but also somewhat subverts it in that he insists he's ''not'' wearing a UsefulNotes/{{Blackbeard}} costume over a gargoyle "costume"; rather, Blackbeard ''[[BeethovenWasAnAlienSpy was]]'' a gargoyle, so he's being historically accurate.
** When another Halloween comes around again in the comic book continuation, Elisa keeps a theme by being [[WesternAnimation/{{Aladdin}} Princess Jasmine]] and Goliath once again doesn't bother. Neither does Delilah, who, not knowing better, explains what she ''really'' is when asked; "dressing up" as a DNA mashup of both Goliath's ex Demona and Elisa, his current love interest, causes ''quite'' the awkward moment. Meanwhile, Angela, Broadway, Lexington and Brooklyn go as [[Film/TheWizardOfOz Dorothy Gale, the Cowardly
** The following year (shown in the Dynamite comics' Halloween Special) somewhat subverts this, as the gargoyles have by this point had their existence exposed for a while and had recently made some progress in public acceptance of them, and so most of the clan attends the Greenwich Village party by invitation, no longer needing to pass off their nature as costumes (several of them do still dress up anyway, while Elisa continues her theme this year as [[WesternAnimation/AliceInWonderland Alice]]). The clan's youngest member, Nashville, still plays the trope straight when going trick-or-treating, but also somewhat subverts it in that he insists he's ''not'' wearing a UsefulNotes/{{Blackbeard}} costume over a gargoyle "costume"; rather, Blackbeard ''[[BeethovenWasAnAlienSpy was]]'' a gargoyle, so he's being historically accurate.
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* In ''WesternAnimation/AaahhRealMonsters'', the main trio of monsters went trick-or-treating without costumes. It was a rare occasion that they met humans and made no effort to scare. Then they confuse a human child dressed as a red bunny with Ickis...
** In another episode, the monsters attend a horror-themed TV show where the audience members wore costumes. A parent even asks Oblina where she bought her "ugly wax lips," to which Oblina replies "darling, you do not ''buy'' ugly, you ''inherit'' it!"
* In Filmation's ''WesternAnimation/TheAdventuresOfBatman'' animated series, the Scarecrow did this at the Halloween charity auction, hoping everyone would mistake him for the disguised Commissioner Gordon.
* In ''WesternAnimation/AdventuresOfTheGummiBears'', the bears take advantage of Folly Day in Dunwyn, with two variants; the occasion takes place strictly in the day and at 5:00 pm there is the traditional unmasking which means the bears have a strict deadline to leave lest they be exposed. It fails -- Duke Igthorn and Toady sneak in disguise, spot Sunni and instantly recognize her as the real thing.
* A subplot of an ''WesternAnimation/AmericanDad'' has Hayley try to help Roger with his self-esteem in public, with disastrous results. She then learns about an upcoming sci-fi convention and takes Roger there, who's now happy due to not having to wear a disguise.
* ''WesternAnimation/AmericanDragonJakeLong'' has the episode "The Halloween Bash". Jake trips and ends up in the street in his dragon form and people started yelling... Over how great his costume looked as Halloween was just getting started. This gives Jake the idea of throwing a party for both magical and non-magical beings.
* The titular character of ''WesternAnimation/AtomicBetty'' wears her Galactic Guardian uniform for Halloween in the episode "When Worlds Collide". Naturally, she ends up called to duty when a member of her RoguesGallery just happens to be hiding on Earth.
* ''WesternAnimation/TheBatman''[='=]s "Grundy's Night" sees Batman, pursuing [[spoiler:Clayface posing as Solomon Grundy]], and runs into a partygoer who mistakes him for another partygoer. Bruce just rolls with it and asks where his "friend" is.
* An episode of ''WesternAnimation/{{Beetlejuice}}'' has B.J. permitted by Lydia to be seen in our world as a reveler as it's Halloween.
* Inversion: The WesternAnimation/BugsBunny cartoon "Hasty Hare" has Bugs coming across Marvin the Martian and K-9 and believing it to be Halloween. He gives them both trick-or-treat candy. (Whether or not it was Halloween is not relevant.)
* In an episode of ''WesternAnimation/CareBearsAdventuresInCareALot'', Funshine travels down to Earth in order to help a little boy. He wants to show him to his Mom, but Funshine explains that he'd prefer to only be seen by kids because "adults don't always understand." During a later scene, the boy's mother enters the attic before Funshine can hide himself. He successfully poses as a stuffed toy.
* ''WesternAnimation/CarmenSandiego'':
** When they're in Rio for Carnival, La Chevre wears a goat costume (with a mask and additional frills not part of his usual outfit). He's repeatedly berated for disguising himself as himself, but he insists it isn't a disguise, just a costume. Averted by the others in the episode; most V.I.L.E. agents indeed wear their standard outfits, but none are passed off as a costume. Meanwhile, [[spoiler:Shadow-san]] wears a crow disguise.
** Come a Halloween party in season 3, Tigress and Paper Star attend in their standard uniforms. Tigress scoffs that "at least a tiger's a ''thing''," since Paper Star's outfit really doesn't resemble anything one could consider a costume. Once again averted by everyone else in the episode. Even Chase attends in a banana costume that earns him the ridicule of his team.
* ''WesternAnimation/CasperTheFriendlyGhost'' once tried to hide his see-through body on Halloween by covering his whole body in a layer of white paint to look more like he was just wearing a ghost costume.
%%* ''WesternAnimation/DannyPhantom'' double episode: "Reality Trip"
* ''WesternAnimation/DarkwingDuck'':
** Darkwing once goes to a masquerade ball in his costume and is frustrated by everyone telling him he couldn't pull it off. [[YourCostumeNeedsWork "The real Darkwing Duck is taller..."]]
** His rival Gizmoduck once attends a ceremony in his honor, full of fans in homemade gizmo suits... all of whom thought he is a dressed-up fanboy too. Bonus points for Launchpad being mistaken for the original by being the only one in a formal suit. Plus a random contrivance.
** In another episode, Launchpad spends a good amount of time agonizing over what costume to wear to a party, before announcing he is going as "a flying ace!" Darkwing starts to point out that that is the same outfit Launchpad always wears, but quickly gives up.
* In ''WesternAnimation/DCShowcaseCatwoman'', Catwoman briefly pretends to be an exotic dancer in a Catwoman costume in order to get closer to Rough Cut.
* Subverted in the ''WesternAnimation/DuckTales2017'' episode "The Trickening", where [[MonsterMash a bunch of stereotypical monsters]] all dress up as characters from more modern horror franchises because kids aren't afraid of the classics anymore. [[spoiler:However, it's played straight at the end of the episode when they go to Scrooge's 24-hour candy store as themselves, with some of the kids even complimenting them on their "costumes".]]
* ''WesternAnimation/TheFairlyOddParents'':
** Cosmo and Wanda pull this off in one of the ''WesternAnimation/OhYeahCartoons'', where they go to a costume party at Vicky's school. They even win second place for their costume, even though both are far too short to be high school students.
** They later go undisguised to a comic book convention, saying that no one would notice they were fairies, and would just assume that they are big-headed kids in costume.
** [[AlienAmongUs Mark]] goes to Trixie's costume party as himself with some encouragement from Timmy. Timmy's fairies do this again at the same party.
%%* A ''WesternAnimation/FamilyGuy'' Halloween Episode had UsefulNotes/BillClinton doing this.
* ''WesternAnimation/{{Gargoyles}}'':
** The Gargoyles love Halloween for just this reason. The younger gargoyles, getting into the spirit of the holiday, wear actual costumes (such as a pirate outfit) and are complimented on wearing "a costume over a costume". Goliath, meanwhile, goes out as himself with Elisa (who goes as [[WesternAnimation/BeautyAndTheBeast Belle]], both as a ShoutOut, and because their relationship is also BeastAndBeauty). Apparently the fact that he's 6'10" passes unremarked upon as part of his "costume".
** When another Halloween comes around again in the comic book continuation, Elisa keeps a theme by being [[WesternAnimation/{{Aladdin}} Princess Jasmine]] and Goliath once again doesn't bother. Neither does Delilah, who, not knowing better, explains what she ''really'' is when asked; "dressing up" as a DNA mashup of both Goliath's ex Demona and Elisa, his current love interest, causes ''quite'' the awkward moment. Meanwhile, Angela, Broadway, Lexington and Brooklyn go as Dorothy Gale, the Cowardly Lion, a cyborg and [[ComicBook/{{Superman}} Supergoyle]], respectively.
* ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'': Ever since Grim cut off Jack's head and Jack got a pumpkin for a replacement, Halloween was the only time of the year Jack could go out shopping.
* ''WesternAnimation/JamiesGotTentacles'': In "Tentacle Man", Jamie takes off his costume and pretends to be Tentacle Man--a character from a comic book--at Mitch's comic store. This proves to be popular.
* ''WesternAnimation/TheLifeAndTimesOfJuniperLee'' averts this. Since a barrier renders all magical creatures invisible to normal humans, child monsters instead dress themselves as humans for Halloween.
* ''WesternAnimation/MenInBlack: The Series'': In "The Jack-O-Lantern Syndrome", Halloween is a favorite holiday of aliens living on Earth, though instead of going as themselves, they often dress up as a different alien species.
** In "The Star System Syndrome", several "monstrous" aliens star in monster horror films using their real appearance, while the film crews believe that they're human actors under a ''lot'' of make-up. The Hollywood branch of MIB specializes in getting entertainment contracts for aliens.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** While he isn't trying to hide his identity from anyone, Spike the purple dragon performs a literal interpretation of this trope as his [[YouMeanXMas Nightmare Night]] costume is... [[ShapedLikeItself a purple dragon]].
** Princess Luna, whose SuperpoweredEvilSide was the inspiration for Nightmare Night, {{Avert|edTrope}}s this when she visits Ponyville, as her 1000-year banishment made her unfamiliar with the custom of dressing as demons and monsters for the holiday.
* ''WesternAnimation/PJMasks''
** In the episode "Halloween Tricksters", both heroes and villains go trick or treating in their usual outfits, and everyone thinks they are just wearing costumes. Still, the heroes still have to be careful not to use their powers in front of others.
** In the episode "PJ Party Crashers", Amaya holds a SlumberParty but knows Luna Girl is planning to ruin it, so she makes it a costumed party so she can attend as Owlette without raising suspicion (again, as long as she makes sure her guests don't see her using her powers).
* In the episode "Quintuplets" of [[WesternAnimation/PoundPuppies2010 the 2010 version of]] ''[[WesternAnimation/PoundPuppies2010 Pound Puppies]]'', Lucky, his team, and the adoptees were able to get into a Poughkeepsie Pups basketball game by he, Cookie, and Niblet dressing in human clothing and buying tickets. Lucky's team used the same tactic to get into an actual Halloween party in another first-season episode, "Nightmare On Pound Street".
* ''WesternAnimation/RandyCunninghamNinthGradeNinja'': In the episode [[HalloweenEpisode "Dawn of The Driscoll"]], Ninja!Randy manages to quietly sneak into [[ArchEnemy McFist's]] house because the former assumed that he was just another trick-or-treating kid in a ninja costume.
--> '''[=McFist=]''': ''Another'' ninja costume? How original.
* In the Halloween special of ''WesternAnimation/ReadyJetGo'', Jet, a humanoid alien, dresses up as a stereotypical alien. And as a bonus, he easily gets away with telling people he is from Bortron 7.
%%* ''WesternAnimation/SabrinaTheAnimatedSeries'': Sabrina wore a witch costume.
* ''WesternAnimation/ShimmerAndShine'': Shimmer and Shine pass themselves as kids wearing genie costumes during a HalloweenEpisode.
* ''WesternAnimation/TheSimpsons'':
** Inverted in "Treehouse of Horror XX", in which Dracula, Frankenstein's Monster, a Werewolf, and the Mummy go out on Halloween, and are made fun of for having old-school costumes. As such, they dress up. So much for their original plans...
** In another "Treehouse of Horror" episode, someone dressed as a witch wins a costume contest at the city-wide Halloween party. But it turns out that she really ''is'' a witch, and she promptly gets disqualified for not wearing a costume. Due to [[TooDumbToLive the people of Springfield this way having pissed off a real witch, with magic powers and all]], it is only natural that now chaos ensues. To be precise: she [[BecomingTheCostume transforms everyone into the costumes they are wearing]] -- which means that this trope afterwards technically applies to ''everyone'' in Springfield.
* The ending of the ''WesternAnimation/SofiaTheFirst'' episode "Ghostly Gala" has Sofia share her Halloween party space with Sir Dax and the other ghosts, and everyone thinks they're animatronics.
** A later Halloween episode has Lucinda's witch friend Indigo go dressed as a witch, in a slight variation of her default outfit. Though considering witches are more of a social class of magic users than a secret in this world, she ''might'' have been dressed as another in-universe witch (like how a person dressing up as Albert Einstein could be classified as "a person dressing up as a person"), but it never specifies.
* In the ''WesternAnimation/SouthPark'' episode "Hell On Earth 2006", Satan sees somebody dressed like Steve Irwin with a stingray barb in his chest at his Halloween party, and goes kicks him out for being insensitive, as Steve had only just died recently. When it turns out that he actually ''is'' the deceased Steve Irwin in JacobMarleyApparel, Satan apologizes profusely for his mistake... and then kicks him out anyway for not wearing a costume.
* ''Franchise/SpiderMan'':
** In ''WesternAnimation/TheSpectacularSpiderMan'', Peter gets caught in-costume at a Halloween festival as Spider-Man, so he goes with it and winds up getting compliments from Mary Jane and Liz Allan on [[EatingTheEyeCandy how well he fills out his costume]]. This actually comes in handy later, when Peter being seen in public as Spider-Man is later shown as evidence that he ISN'T Spider-Man. And judging by her [[EarlyBirdCameo cameo]] at the same carnival, Black Cat likes the holiday too.
** In ''WesternAnimation/SpiderManTheAnimatedSeries'', Spidey is fighting the Sinister Six with his powers working inconsistently. He manages to convince Rhino that he is actually the Chameleon, and redirects TheBrute to attack a distant shadow that is actually his teammate Shocker.
** The short-lived ''The Adventures of the Spider-Man'' features an episode where Peter has no way of getting home without his identity being revealed (his headpiece is gone but he still has his main suit on). He then gets spotted by a crowd of people who all shout out: "great costume man!". Conveniently it is Independence day and a huge fancy costume party is being held in the Star Junction, so Peter just blends right in to the crowds.
* ''WesternAnimation/SuperNoobs'': The Halloween episode "Happy Noob-O-Ween" has aliens Memnock and Zenblock try to learn about Halloween by going [[ManChild trick or treating]] in their true alien forms and no costumes although some of their neighbors mistake their forms for costumes. Both Mem and Zen end up getting more than what they bargained for in terms of more than just candy through their alien identities and use of their battle balls.
* The ''WesternAnimation/TeachersPet'' HalloweenEpisode "Costume Pity Party" had Spot intend to wear a Ferdinand Magellan costume for the school's Halloween party, but [[AllClothUnravels his costume unravels after getting caught on a thorn bush]], which results in him instead pretending that his human persona Scott Leadready II is wearing a dog costume for Halloween.
* ''Franchise/TeenageMutantNinjaTurtles'' cartoons:
** Used by the turtles in an episode of ''WesternAnimation/TeenageMutantNinjaTurtles1987'', where Splinter suggests they go as themselves to a Halloween party. They lose to someone who went as a Teenage Mutant Ninja AARDVARK (Who also happened to be the boss of the place).
** ''WesternAnimation/TeenageMutantNinjaTurtles2003'': It is revealed in “All Hallows Thieves” that for years Halloween was the ''only'' day Splinter would take the turtles to the surface and that they would trick-or-treat all day.
** In the ''2003'' episode "Return of the Justice Force", the Turtles visit a comic book store which, as Casey Jones points out, is having a Costume Day.
* {{Franchise/Transformers}} cartoons:
** In one of the early episodes of ''Anime/TransformersCybertron'', the Autobots worry about revealing themselves on Earth. Bud jokingly suggests they pretend they're cosplayers (as Transformers are basically urban legends). Cue communal sweatdrop when Optimus Prime actually takes the suggestion seriously, apparently not realizing that twenty-foot robots cannot get away with pretending they are costumes.
** However, in the [[WesternAnimation/TheTransformers first-generation cartoon]] they did exactly that. In "Auto-Bop", when Tracks and Blaster are investigating a trendy New York nightclub, a patron is very impressed with their "outfits".
--->'''Clubgoer:''' Hey! Where'd you get those threads? [=SoHo=]?\\
'''Tracks:''' Cybertron.\\
'''Clubgoer:''' What's the address?
* In the ''WesternAnimation/{{Tutenstein}}'' episode "Day of the Undead," Tut walks among mortals on Halloween, impressing trick-or-treaters with how much his costume looks and smells like a long-dead mummy.
* ''WesternAnimation/TheVentureBrothers'':
** In "Love-Bheits", the trope was [[ExploitedTrope exploited]] off-camera when the Impossible family won a Best Group Costume award [[ExpyCoexistence as the]] Comicbook/FantasticFour.
** An [[InvertedTrope inversion]] is [[DiscussedTrope discussed]] in "A Very Venture Halloween". Since Dr. Orpheus is almost never seen without his OminousOperaCape and MysticalHighCollar even in mixed company, wiseguy Dermott joked that on Halloween he expected to see Orpheus in sweatpants.
* ''WesternAnimation/WinxClub'': In [[Recap/WinxClubS2E16Hallowinx "Hallowinx!"]], Bloom gets invited to AlphaBitch Mitzy's Halloween party. She decides to go along with her friends. They decide that their fairy transformation outfits are going to be their costumes because no one would believe they are actual fairies.
* The cartoon adaptation of ''WesternAnimation/{{WITCH}}'' tops the comic: the girls move around the city in the Guardian outfits, Nerissa doing the same, Phobos going around in his evil prince outfit, Matt turning into Shagon, and ''Cedric and Miranda going out in his slippery dippery long mover-man and giant spider forms respectively''. and the only attention he drew was on how he filled the tail of his costume. The ''only'' attention they get are Cornelia's mother glancing at Hay Lin's '[[OlderAlterEgo endowments]]' and commenting "I didn't know Halloween costumes came with ''[[FakeBoobs that]]'' kind of padding." and people wondering how many guys are inside Cedric's costume. ''Then'' they start battling, and everyone mistakes it for a show.
* In ''WesternAnimation/WordGirl'', one of Becky Botsford's friends, Todd "Scoops" Ming, realizes that she may be the titular superhero, citing several reasons including "You dress up as [=WordGirl=] every Halloween!" When the Narrator reacts, Becky responds "Well, I already had the costume...." In addition, a supporting character, Violet, dresses as the titular character in the Halloween-themed episode "Tobey's Tricks and Treats", and is mistaken as the superheroine by Tobey himself.
* In the ''WesternAnimation/XMenEvolution'' episode "Cajun Charm," the X-Men find themselves in the middle of Mardi Gras in New Orleans while looking for Rogue, who's been kidnapped. A random person comes up to Kurt, who's in his X-Men uniform and not wearing his image inducer, and tells him that his ''costume'' is great. Kurt's response? "Thanks! They are one of a kind."
* In the ''WesternAnimation/YoungJustice'' episode "True Heroes", Forager intends to go to the Happy Harbour Halloween party by dropping his Fred Bugg disguise. Cyborg, while not wanting to go at all, is apparently also going to pass his implants off as a costume. However a mission comes up, so they don't attend after all.
----
** In another episode, the monsters attend a horror-themed TV show where the audience members wore costumes. A parent even asks Oblina where she bought her "ugly wax lips," to which Oblina replies "darling, you do not ''buy'' ugly, you ''inherit'' it!"
* In Filmation's ''WesternAnimation/TheAdventuresOfBatman'' animated series, the Scarecrow did this at the Halloween charity auction, hoping everyone would mistake him for the disguised Commissioner Gordon.
* In ''WesternAnimation/AdventuresOfTheGummiBears'', the bears take advantage of Folly Day in Dunwyn, with two variants; the occasion takes place strictly in the day and at 5:00 pm there is the traditional unmasking which means the bears have a strict deadline to leave lest they be exposed. It fails -- Duke Igthorn and Toady sneak in disguise, spot Sunni and instantly recognize her as the real thing.
* A subplot of an ''WesternAnimation/AmericanDad'' has Hayley try to help Roger with his self-esteem in public, with disastrous results. She then learns about an upcoming sci-fi convention and takes Roger there, who's now happy due to not having to wear a disguise.
* ''WesternAnimation/AmericanDragonJakeLong'' has the episode "The Halloween Bash". Jake trips and ends up in the street in his dragon form and people started yelling... Over how great his costume looked as Halloween was just getting started. This gives Jake the idea of throwing a party for both magical and non-magical beings.
* The titular character of ''WesternAnimation/AtomicBetty'' wears her Galactic Guardian uniform for Halloween in the episode "When Worlds Collide". Naturally, she ends up called to duty when a member of her RoguesGallery just happens to be hiding on Earth.
* ''WesternAnimation/TheBatman''[='=]s "Grundy's Night" sees Batman, pursuing [[spoiler:Clayface posing as Solomon Grundy]], and runs into a partygoer who mistakes him for another partygoer. Bruce just rolls with it and asks where his "friend" is.
* An episode of ''WesternAnimation/{{Beetlejuice}}'' has B.J. permitted by Lydia to be seen in our world as a reveler as it's Halloween.
* Inversion: The WesternAnimation/BugsBunny cartoon "Hasty Hare" has Bugs coming across Marvin the Martian and K-9 and believing it to be Halloween. He gives them both trick-or-treat candy. (Whether or not it was Halloween is not relevant.)
* In an episode of ''WesternAnimation/CareBearsAdventuresInCareALot'', Funshine travels down to Earth in order to help a little boy. He wants to show him to his Mom, but Funshine explains that he'd prefer to only be seen by kids because "adults don't always understand." During a later scene, the boy's mother enters the attic before Funshine can hide himself. He successfully poses as a stuffed toy.
* ''WesternAnimation/CarmenSandiego'':
** When they're in Rio for Carnival, La Chevre wears a goat costume (with a mask and additional frills not part of his usual outfit). He's repeatedly berated for disguising himself as himself, but he insists it isn't a disguise, just a costume. Averted by the others in the episode; most V.I.L.E. agents indeed wear their standard outfits, but none are passed off as a costume. Meanwhile, [[spoiler:Shadow-san]] wears a crow disguise.
** Come a Halloween party in season 3, Tigress and Paper Star attend in their standard uniforms. Tigress scoffs that "at least a tiger's a ''thing''," since Paper Star's outfit really doesn't resemble anything one could consider a costume. Once again averted by everyone else in the episode. Even Chase attends in a banana costume that earns him the ridicule of his team.
* ''WesternAnimation/CasperTheFriendlyGhost'' once tried to hide his see-through body on Halloween by covering his whole body in a layer of white paint to look more like he was just wearing a ghost costume.
%%* ''WesternAnimation/DannyPhantom'' double episode: "Reality Trip"
* ''WesternAnimation/DarkwingDuck'':
** Darkwing once goes to a masquerade ball in his costume and is frustrated by everyone telling him he couldn't pull it off. [[YourCostumeNeedsWork "The real Darkwing Duck is taller..."]]
** His rival Gizmoduck once attends a ceremony in his honor, full of fans in homemade gizmo suits... all of whom thought he is a dressed-up fanboy too. Bonus points for Launchpad being mistaken for the original by being the only one in a formal suit. Plus a random contrivance.
** In another episode, Launchpad spends a good amount of time agonizing over what costume to wear to a party, before announcing he is going as "a flying ace!" Darkwing starts to point out that that is the same outfit Launchpad always wears, but quickly gives up.
* In ''WesternAnimation/DCShowcaseCatwoman'', Catwoman briefly pretends to be an exotic dancer in a Catwoman costume in order to get closer to Rough Cut.
* Subverted in the ''WesternAnimation/DuckTales2017'' episode "The Trickening", where [[MonsterMash a bunch of stereotypical monsters]] all dress up as characters from more modern horror franchises because kids aren't afraid of the classics anymore. [[spoiler:However, it's played straight at the end of the episode when they go to Scrooge's 24-hour candy store as themselves, with some of the kids even complimenting them on their "costumes".]]
* ''WesternAnimation/TheFairlyOddParents'':
** Cosmo and Wanda pull this off in one of the ''WesternAnimation/OhYeahCartoons'', where they go to a costume party at Vicky's school. They even win second place for their costume, even though both are far too short to be high school students.
** They later go undisguised to a comic book convention, saying that no one would notice they were fairies, and would just assume that they are big-headed kids in costume.
** [[AlienAmongUs Mark]] goes to Trixie's costume party as himself with some encouragement from Timmy. Timmy's fairies do this again at the same party.
%%* A ''WesternAnimation/FamilyGuy'' Halloween Episode had UsefulNotes/BillClinton doing this.
* ''WesternAnimation/{{Gargoyles}}'':
** The Gargoyles love Halloween for just this reason. The younger gargoyles, getting into the spirit of the holiday, wear actual costumes (such as a pirate outfit) and are complimented on wearing "a costume over a costume". Goliath, meanwhile, goes out as himself with Elisa (who goes as [[WesternAnimation/BeautyAndTheBeast Belle]], both as a ShoutOut, and because their relationship is also BeastAndBeauty). Apparently the fact that he's 6'10" passes unremarked upon as part of his "costume".
** When another Halloween comes around again in the comic book continuation, Elisa keeps a theme by being [[WesternAnimation/{{Aladdin}} Princess Jasmine]] and Goliath once again doesn't bother. Neither does Delilah, who, not knowing better, explains what she ''really'' is when asked; "dressing up" as a DNA mashup of both Goliath's ex Demona and Elisa, his current love interest, causes ''quite'' the awkward moment. Meanwhile, Angela, Broadway, Lexington and Brooklyn go as Dorothy Gale, the Cowardly Lion, a cyborg and [[ComicBook/{{Superman}} Supergoyle]], respectively.
* ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'': Ever since Grim cut off Jack's head and Jack got a pumpkin for a replacement, Halloween was the only time of the year Jack could go out shopping.
* ''WesternAnimation/JamiesGotTentacles'': In "Tentacle Man", Jamie takes off his costume and pretends to be Tentacle Man--a character from a comic book--at Mitch's comic store. This proves to be popular.
* ''WesternAnimation/TheLifeAndTimesOfJuniperLee'' averts this. Since a barrier renders all magical creatures invisible to normal humans, child monsters instead dress themselves as humans for Halloween.
* ''WesternAnimation/MenInBlack: The Series'': In "The Jack-O-Lantern Syndrome", Halloween is a favorite holiday of aliens living on Earth, though instead of going as themselves, they often dress up as a different alien species.
** In "The Star System Syndrome", several "monstrous" aliens star in monster horror films using their real appearance, while the film crews believe that they're human actors under a ''lot'' of make-up. The Hollywood branch of MIB specializes in getting entertainment contracts for aliens.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** While he isn't trying to hide his identity from anyone, Spike the purple dragon performs a literal interpretation of this trope as his [[YouMeanXMas Nightmare Night]] costume is... [[ShapedLikeItself a purple dragon]].
** Princess Luna, whose SuperpoweredEvilSide was the inspiration for Nightmare Night, {{Avert|edTrope}}s this when she visits Ponyville, as her 1000-year banishment made her unfamiliar with the custom of dressing as demons and monsters for the holiday.
* ''WesternAnimation/PJMasks''
** In the episode "Halloween Tricksters", both heroes and villains go trick or treating in their usual outfits, and everyone thinks they are just wearing costumes. Still, the heroes still have to be careful not to use their powers in front of others.
** In the episode "PJ Party Crashers", Amaya holds a SlumberParty but knows Luna Girl is planning to ruin it, so she makes it a costumed party so she can attend as Owlette without raising suspicion (again, as long as she makes sure her guests don't see her using her powers).
* In the episode "Quintuplets" of [[WesternAnimation/PoundPuppies2010 the 2010 version of]] ''[[WesternAnimation/PoundPuppies2010 Pound Puppies]]'', Lucky, his team, and the adoptees were able to get into a Poughkeepsie Pups basketball game by he, Cookie, and Niblet dressing in human clothing and buying tickets. Lucky's team used the same tactic to get into an actual Halloween party in another first-season episode, "Nightmare On Pound Street".
* ''WesternAnimation/RandyCunninghamNinthGradeNinja'': In the episode [[HalloweenEpisode "Dawn of The Driscoll"]], Ninja!Randy manages to quietly sneak into [[ArchEnemy McFist's]] house because the former assumed that he was just another trick-or-treating kid in a ninja costume.
--> '''[=McFist=]''': ''Another'' ninja costume? How original.
* In the Halloween special of ''WesternAnimation/ReadyJetGo'', Jet, a humanoid alien, dresses up as a stereotypical alien. And as a bonus, he easily gets away with telling people he is from Bortron 7.
%%* ''WesternAnimation/SabrinaTheAnimatedSeries'': Sabrina wore a witch costume.
* ''WesternAnimation/ShimmerAndShine'': Shimmer and Shine pass themselves as kids wearing genie costumes during a HalloweenEpisode.
* ''WesternAnimation/TheSimpsons'':
** Inverted in "Treehouse of Horror XX", in which Dracula, Frankenstein's Monster, a Werewolf, and the Mummy go out on Halloween, and are made fun of for having old-school costumes. As such, they dress up. So much for their original plans...
** In another "Treehouse of Horror" episode, someone dressed as a witch wins a costume contest at the city-wide Halloween party. But it turns out that she really ''is'' a witch, and she promptly gets disqualified for not wearing a costume. Due to [[TooDumbToLive the people of Springfield this way having pissed off a real witch, with magic powers and all]], it is only natural that now chaos ensues. To be precise: she [[BecomingTheCostume transforms everyone into the costumes they are wearing]] -- which means that this trope afterwards technically applies to ''everyone'' in Springfield.
* The ending of the ''WesternAnimation/SofiaTheFirst'' episode "Ghostly Gala" has Sofia share her Halloween party space with Sir Dax and the other ghosts, and everyone thinks they're animatronics.
** A later Halloween episode has Lucinda's witch friend Indigo go dressed as a witch, in a slight variation of her default outfit. Though considering witches are more of a social class of magic users than a secret in this world, she ''might'' have been dressed as another in-universe witch (like how a person dressing up as Albert Einstein could be classified as "a person dressing up as a person"), but it never specifies.
* In the ''WesternAnimation/SouthPark'' episode "Hell On Earth 2006", Satan sees somebody dressed like Steve Irwin with a stingray barb in his chest at his Halloween party, and goes kicks him out for being insensitive, as Steve had only just died recently. When it turns out that he actually ''is'' the deceased Steve Irwin in JacobMarleyApparel, Satan apologizes profusely for his mistake... and then kicks him out anyway for not wearing a costume.
* ''Franchise/SpiderMan'':
** In ''WesternAnimation/TheSpectacularSpiderMan'', Peter gets caught in-costume at a Halloween festival as Spider-Man, so he goes with it and winds up getting compliments from Mary Jane and Liz Allan on [[EatingTheEyeCandy how well he fills out his costume]]. This actually comes in handy later, when Peter being seen in public as Spider-Man is later shown as evidence that he ISN'T Spider-Man. And judging by her [[EarlyBirdCameo cameo]] at the same carnival, Black Cat likes the holiday too.
** In ''WesternAnimation/SpiderManTheAnimatedSeries'', Spidey is fighting the Sinister Six with his powers working inconsistently. He manages to convince Rhino that he is actually the Chameleon, and redirects TheBrute to attack a distant shadow that is actually his teammate Shocker.
** The short-lived ''The Adventures of the Spider-Man'' features an episode where Peter has no way of getting home without his identity being revealed (his headpiece is gone but he still has his main suit on). He then gets spotted by a crowd of people who all shout out: "great costume man!". Conveniently it is Independence day and a huge fancy costume party is being held in the Star Junction, so Peter just blends right in to the crowds.
* ''WesternAnimation/SuperNoobs'': The Halloween episode "Happy Noob-O-Ween" has aliens Memnock and Zenblock try to learn about Halloween by going [[ManChild trick or treating]] in their true alien forms and no costumes although some of their neighbors mistake their forms for costumes. Both Mem and Zen end up getting more than what they bargained for in terms of more than just candy through their alien identities and use of their battle balls.
* The ''WesternAnimation/TeachersPet'' HalloweenEpisode "Costume Pity Party" had Spot intend to wear a Ferdinand Magellan costume for the school's Halloween party, but [[AllClothUnravels his costume unravels after getting caught on a thorn bush]], which results in him instead pretending that his human persona Scott Leadready II is wearing a dog costume for Halloween.
* ''Franchise/TeenageMutantNinjaTurtles'' cartoons:
** Used by the turtles in an episode of ''WesternAnimation/TeenageMutantNinjaTurtles1987'', where Splinter suggests they go as themselves to a Halloween party. They lose to someone who went as a Teenage Mutant Ninja AARDVARK (Who also happened to be the boss of the place).
** ''WesternAnimation/TeenageMutantNinjaTurtles2003'': It is revealed in “All Hallows Thieves” that for years Halloween was the ''only'' day Splinter would take the turtles to the surface and that they would trick-or-treat all day.
** In the ''2003'' episode "Return of the Justice Force", the Turtles visit a comic book store which, as Casey Jones points out, is having a Costume Day.
* {{Franchise/Transformers}} cartoons:
** In one of the early episodes of ''Anime/TransformersCybertron'', the Autobots worry about revealing themselves on Earth. Bud jokingly suggests they pretend they're cosplayers (as Transformers are basically urban legends). Cue communal sweatdrop when Optimus Prime actually takes the suggestion seriously, apparently not realizing that twenty-foot robots cannot get away with pretending they are costumes.
** However, in the [[WesternAnimation/TheTransformers first-generation cartoon]] they did exactly that. In "Auto-Bop", when Tracks and Blaster are investigating a trendy New York nightclub, a patron is very impressed with their "outfits".
--->'''Clubgoer:''' Hey! Where'd you get those threads? [=SoHo=]?\\
'''Tracks:''' Cybertron.\\
'''Clubgoer:''' What's the address?
* In the ''WesternAnimation/{{Tutenstein}}'' episode "Day of the Undead," Tut walks among mortals on Halloween, impressing trick-or-treaters with how much his costume looks and smells like a long-dead mummy.
* ''WesternAnimation/TheVentureBrothers'':
** In "Love-Bheits", the trope was [[ExploitedTrope exploited]] off-camera when the Impossible family won a Best Group Costume award [[ExpyCoexistence as the]] Comicbook/FantasticFour.
** An [[InvertedTrope inversion]] is [[DiscussedTrope discussed]] in "A Very Venture Halloween". Since Dr. Orpheus is almost never seen without his OminousOperaCape and MysticalHighCollar even in mixed company, wiseguy Dermott joked that on Halloween he expected to see Orpheus in sweatpants.
* ''WesternAnimation/WinxClub'': In [[Recap/WinxClubS2E16Hallowinx "Hallowinx!"]], Bloom gets invited to AlphaBitch Mitzy's Halloween party. She decides to go along with her friends. They decide that their fairy transformation outfits are going to be their costumes because no one would believe they are actual fairies.
* The cartoon adaptation of ''WesternAnimation/{{WITCH}}'' tops the comic: the girls move around the city in the Guardian outfits, Nerissa doing the same, Phobos going around in his evil prince outfit, Matt turning into Shagon, and ''Cedric and Miranda going out in his slippery dippery long mover-man and giant spider forms respectively''. and the only attention he drew was on how he filled the tail of his costume. The ''only'' attention they get are Cornelia's mother glancing at Hay Lin's '[[OlderAlterEgo endowments]]' and commenting "I didn't know Halloween costumes came with ''[[FakeBoobs that]]'' kind of padding." and people wondering how many guys are inside Cedric's costume. ''Then'' they start battling, and everyone mistakes it for a show.
* In ''WesternAnimation/WordGirl'', one of Becky Botsford's friends, Todd "Scoops" Ming, realizes that she may be the titular superhero, citing several reasons including "You dress up as [=WordGirl=] every Halloween!" When the Narrator reacts, Becky responds "Well, I already had the costume...." In addition, a supporting character, Violet, dresses as the titular character in the Halloween-themed episode "Tobey's Tricks and Treats", and is mistaken as the superheroine by Tobey himself.
* In the ''WesternAnimation/XMenEvolution'' episode "Cajun Charm," the X-Men find themselves in the middle of Mardi Gras in New Orleans while looking for Rogue, who's been kidnapped. A random person comes up to Kurt, who's in his X-Men uniform and not wearing his image inducer, and tells him that his ''costume'' is great. Kurt's response? "Thanks! They are one of a kind."
* In the ''WesternAnimation/YoungJustice'' episode "True Heroes", Forager intends to go to the Happy Harbour Halloween party by dropping his Fred Bugg disguise. Cyborg, while not wanting to go at all, is apparently also going to pass his implants off as a costume. However a mission comes up, so they don't attend after all.
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