History Main / TemporarilyAVillain

*** Bubbles twice: "[[Recap/ThePowerpuffGirlsS1E9BubbleviciousTheBareFacts Bubblevicious]]" where she becomes too aggressive and "[[Recap/ThePowerpuffGirlsS2E6SlaveTheDayLosDosMojo Los Dos Mojos]]" where she loses her memory and terrorizes Townsville under the belief she's Mojo Jojo.

** Jorgen Von Strangle in the episode "[[Recap/TheFairlyOddParentsS2E5ActionPacked Action Packed!]]". While he's normally merely a {{Jerkass}} (albeit with a HiddenHeartOfGold), Timmy's wish that his life was an action movie turns Jorgen into an action movie villain, who kidnaps fairies and uses a machine to suck the magic energy out of them and transfer it to himself, making him even more powerful and gigantically muscle-bound. Luckily, he's returned to normal when the wish is unwished.

* In ''WesternAnimation/PhineasAndFerb'', there are four different episodes in which a character is either BrainwashedAndCrazy or has their mental faculties increased and/or twisted to villainous levels: Baljeet becomes an EvilGenius bent on [[ApocalypseHow removing Earth's atmosphere]] ForScience in "Cranius Maximus", Carl The Intern, who is normally a doormat to Major Monogram, turns against him after accidentally being blasted with Doofenshmirtz's Ultimate Evil-Inator and attempts to take over the O.W.C.A. and the Tri-State Area in the "Where's Perry?" Two-Parter, Lawrence is accidentally turned evil as well and finds himself [[ItMakesSenseInContext becoming king of the pharmacists]] in "Bullseye!", and in the [[WesternAnimation/PhineasAndFerbStarWars "Star Wars" episode]], Ferb is blasted with a Sith-Inator, becomes an expy of Darth Maul, and attacks Phineas. According to WordOfGod, this was the only feasible way to orchestrate a fight between the stepbrothers.

* During the late nineties, Comicbook/IronMan went insane and became a villain, only to be replaced briefly by a younger version of himself from a different time. He also TookALevelInJerkass and acted like a villain in the Franchise/MarvelUniverse for about a year after ''Comicbook/CivilWar''.

->''"When a strange alien symbiote turns Franchise/SpiderMan's suit black, his darkest demons come to light - changing Spider-Man inside as well as out."''

* ''Manga/FoodWars'': Akira Hayama temporarily joins the now Central-controlled Council of Ten under Azami Nakiri's administration, much to the consternation of Soma when he appears to evaluate him as part of the Promotion Exams. It's later revealed he did so because Azami blackmailed him by threatening to take Jun's lifelong research and shut down the Shiomi Seminar.

* ''Comicbook/{{Axis}}'': Numerous superheroes -- Iron Man, [[ComicBook/LukeCage Power Man]], and the ComicBook/XMen, to name a few -- have their moral alignments inverted, resulting in Power Man becoming a ruthless gangster, and the X-Men deciding to carry out a genocide on all non-mutants.

* Franchise/IndianaJones temporarily becomes a [[ReligionOfEvil Thuggee cult member]] in ''Film/IndianaJonesAndTheTempleOfDoom'' and nearly sacrifices Short Round and Willie in the process, but he manages to snap out of Mola Ram's mind-warping in time.

* The EMH on ''Series/StarTrekVoyager'' was reprogrammed to perform unethical-at-best medicine by the Equinox crew.
* ''Series/BuffyTheVampireSlayer'' briefly toys with the dark side a few times. At the opening of season two (induced by trauma) and in a brief arc in season three.
** Done again in the ''Series/{{Angel}}'' episode "Sanctuary" where Buffy is the villain because she wants to kill Faith out of revenge.
** Willow at the end of season 6 when she becomes Dark Willow and eventually tries to [[WoobieDestroyerOfWorlds destroy the world]]. She gets better.
* ''Series/TheFlash2014'':
** Season 5: Upon tapping into the Negative Speed-Force, Nora West-Allen becomes engulfed with resentment and rage. Having been manipulated by Eobard Thawne into despising her father, Barry, she pulls a brief FaceHeelTurn. However, being a kind-hearted person by nature, Nora finally accepts Barry's plea and rejoins the team.
** Season 6: This time it's the Flash himself who fails to resist corruption. Upon absorbing some of the blood cells of the BigBad Ramsey Rosso/Bloodwork, Barry soon falls into a catatonic state during which he is entrapped within his own mind. Controlling his cells by remote, Rosso slowly twists Barry's mind with beautiful lies and promises too good to be true. Despite the Speed-Force's assistance, Barry eventually gives in and becomes a zombie-like Dark Flash. However, he does not give up, and just like in Nora's case, his inherent goodness finally shines through, though not without his friends' help. Moreover, the bond between the Flash and Ramsey allows the former to access the latter's mind as well, which in turn helps Barry incapacitate the villain.

* ''Series/DoctorWho'': The Time Lord Victorious from "The Waters of Mars." He comes to his senses ''very'' quickly, though.

* ''[[Franchise/SuperMarioBros Mario]]'' of all people is the BigBad of ''Franchise/DonkeyKong Jr.''
* ''VideoGame/ArtOfFighting'':
** Downplayed. [[{{Bifauxnen}} King]] and [[SNKBoss Takuma]] were originally cast as villains who worked for series antagonist, [[BaldOfEvil Mr.]] [[TheDragon Big.]] The former was forcibly conscripted after being beaten by Jack and his gang, while the latter was blackmailed, by Mr. Big, who had [[IHaveYourWife kidnapped Takuma's daughter, Yuri.]]
** Shortly after the conclusion of the first game's events, King cut ties with Big and befriended the Sakazakis, while also becoming Ryo's {{Love Interest|s}}. And Takuma returned to his family, where he resumed his position as head of the Kyokuugen Dojo.

** Jimmy was an antagonist in the episode "If It Smells Like An Ed", when [[spoiler: he turned out to be the one who got the Eds in trouble, as retaliation for Eddy giving him an atomic wedgie.]]
** Ed himself is this in "Little Ed Blue" (where he was violently ill-tempered all day [[spoiler: because of [[RampageFromANail a pebble stuck in his shoe]]]]) and "The Day the Ed Stood Still" (when he dressed up as a space monster and [[LostInCharacter got a little too into character]]).

*** Buttercup was an antagonist in "Moral Decay", [[TheToothHurts using teeth beaten out of villains]] [[GetRichQuickScheme for cash]], then resorting to doing so to those who had yet to do anything evil, which is one of her biggest JerkassBall moments, all for the purpose of wanting a new punching bag. Buttercup, as a result, has [[KarmicInjury her own teeth knocked out]] when beaten up by the villains after Blossom and Bubbles find out what she did behind their backs, and then [[AFoolAndHisNewMoneyAreSoonParted loses all the money she swindled]] [[LaserGuidedKarma when the Professor uses it to pay her dental bills]].
*** Blossom's golf club-stealing incident in "A Very Special Blossom."
*** The Mayor becomes one in "Hot Air Buffon" when he tries to fight crime without the girls by using a hot air balloon with a boxing glove, but he ends up injuring innocent people, so the girls have to stop him.
*** Bubbles twice: "Bubblevicious" where she becomes too aggressive and "Los Dos Mojos" where she loses her memory and terrorizes Townsville under the belief she's Mojo Jojo.

** In another episode she's nicked by a vampire, who uses her blood to turn them both into vampire/banshee hybrids [[spoiler: she resists when she's asked to drain Nick dry, giving The Alliance time to turn up, knock them out and reverse the process]].

** Mrs. Puff has one in "Demolition Doofus" which gets her dangerously close to crossing the MoralEventHorizon.

* ''WesternAnimation/TheFairlyOddParents'':
** Jorgen Von Strangle in the episode "Action Packed!". While he's normally merely a JerkAss (albeit with a HiddenHeartOfGold), Timmy's wish that his life was an action movie turns Jorgen into an action movie villain, who kidnaps fairies and uses a machine to suck the magic energy out of them and transfer it to himself, making him even more powerful and gigantically muscle-bound. Luckily, he's returned to normal when the wish is unwished.
** Timmy himself in "Nega-Timmy", who is transformed into a villain after he wishes to do the opposite of what he is told, but is told to "be as ''evil'' as possible" by his dad.
** Cosmo and Wanda in "Future Lost", after they become BrainwashedAndCrazy robots.
** Timmy’s dad in the BadFuture shown in "Father Time".
** "The Masked Magician" has two examples, Mr. Bickles throughout most of the episode, and Britney Britney by the end.
** Tootie is usually a sympathetic character, but she’s clearly a villain in a number of episodes, like "Timmy’s 2-D House of Horror" and "Dread n’ Breakfast".
* WesternAnimation/RockosModernLife in "Power Trip" after ignoring Mr. Smitty who told him, "Don't push the green button!"
* Principal Skinner is turned into an antagonist in a few of the musical episodes of ''WesternAnimation/TheSimpsons'' such as "The President Wore Pearls" and "Yokel Chords", even explicitly having an "evil plan" in the former. Superintendent Chalmers as well, although he's ordinarily a {{Jerkass}} anyway.
* In ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'' most main characters have their own episodes as antagonistic threats, usually when they get the motivation to screw the rest of the cast over. A special mention goes to Irwin who in one episode manages to get his hands on Grim's scythe. Naturally, he gets DrunkWithPower and uses the scythe to unleash all sorts of pandemonium upon Endsville and hypnotize Mandy to be his mindless concubine. Eventually, Billy manages to defeat him with some super-hard sandwiches he made and Irwin ends up turned into a sea monkey, whom Billy quickly takes as a pet.
* Gumball has stinted as this in various ''WesternAnimation/TheAmazingWorldOfGumball'' episodes:
** He becomes a VillainProtagonist in "The Saint", doing a series of increasingly cruel and harmful things to Alan solely to prove that Alan can't possibly be as perfect as he appears and that ''something'' must upset him, going so far as selling Alan's parents to Elmore’s resident MonsterClown and showing Alan a tape of them being twisted into balloon animals; at this point, Darwin remarks that Gumball has long since crossed the line and will most likely go to prison.
** In "The Name", he becomes a villain [[MakesJustAsMuchSenseInContext because of a different part of his personality that he can not control]].
** Gumball can be considered this in "The Dream", where he passes most of the episode acting as a JerkAss to Darwin and even tries to choke him (although he fails miserably because Darwin doesn't have a neck).
** In "The Ex", he tries to help Rob destroy Banana Joe, and explodes the Tobias' house, clearly hurting him (Tobias may be a {{Jerkass}}, but it's [[DisproportionateRetribution worse than he deserves]]).
** In "The Stars", he blackmails Larry with bad reviews of the many businesses where Larry works, in order to get high-quality products, sometimes free, and even obliges Larry to break the laws of nature.
%%** In "The Bet", although he later has a HeelRealization and a dose of LaserGuidedKarma, at the end he has not learned anything.
* In ''WesternAnimation/PhineasAndFerb'', there are four different episodes in which a character is either BrainwashedAndCrazy or has their mental faculties increased and/or twisted to villainous levels: Baljeet becomes an EvilGenius bent on [[ApocalypseHow removing Earth's atmosphere]] ForScience in "Cranius Maximus", Carl The Intern, who is normally a doormat to Major Monogram, turns against him after accidentally being blasted with Doofenshmirtz's Ultimate Evil-Inator and attempts to take over the O.W.C.A. and the Tri-State Area in the "Where's Perry?" Two-Parter, Lawrence is accidentally turned evil as well and finds himself [[ItMakesSenseInContext becoming king of the pharmacists]] in "Bullseye!", and in the [[WesternAnimation/PhineasAndFerbStarWars "Star Wars" episode]], Ferb is blasted with a Sith-Inator, becomes an expy of Darth Maul, and attacks Phineas. According to WordOfGod, this was the only feasible way to orchestrate a fight between the stepbrothers.
* Happens OncePerEpisode in ''WesternAnimation/MiraculousLadybug'', as [[BigBad Hawkmoth]] has the power to turn people experiencing negative emotions into supervillains. Fortunately, the heroes can easily reverse the process once the villain is defeated at the end of the episode.
* In the ''WesternAnimation/StarTrekLowerDecks'' episode "Crisis Point", Ensign Beckett Mariner's frustrations with her mother, Captain Carol Freeman, leads her to hijack a Holodeck simulation of the Cerritos crew and go on a killing spree against them. It is only when she ends up fighting her own doppelganger, however, when Mariner comes to her senses and accepts her place on the crew.
* The ''WesternAnimation/{{Vampirina}}'' episode "April Ghoul's Day" has the Hauntley family, particularly Vee, take on a slightly antagonistic role when they keep pranking Poppy and Bridget with a barrage of tricks. Fortunately, it's portrayed in an Main/InnocentlyInsensitive way where they're just really into their game. They accept being pranked by Poppy and Bridget as well as apologize for going too far, realizing that it's all about everyone having fun.

* Many episodes of ''WesternAnimation/MuppetBabies2018'' will sometimes place certain characters in antagonistic roles to fit the fantasy. "Animal Kong" has Animal grow to giant size and throw a temper tantrum when he isn't allowed to play his drums. The superhero episodes will have Gonzo as Dr. Meanzo with Animal and Fozzie as his sidekicks, Meanimal and The Noodler. "Library Leapfrog" puts Summer and Piggy in the role when they act like thieves and steal Robin's game.
* ''WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius'' has done this several times: Examples include Sheen in "Sheen’s Brain", Libby in "The Tomorrow Boys", and even Jimmy himself in "Hall Monster". The first ''WesternAnimation/JimmyTimmyPowerHour'' meanwhile did this to Goddard.
* ''WesternAnimation/CourageTheCowardlyDog'': Courage's [[OmniscientDatabase Computer]] is usually a helpful, [[DeadpanSnarker if vituperative]], source of information. But in "Mega Muriel the Magnificent", he [[GrandTheftMe possesses Muriel]] and endangers her body out of a misguided attempt to prove his own superiority to organic creatures. After Courage proves his bravery, however, he returns Muriel's body and goes back to normal.

** Timmy himself in "Nega-Timmy", who is transformed into a villain after he wishes to do the opposite of what he is told, but is told to "be good" by his dad.

** "Operation: M.I.S.S.I.O.N." has Numbuh Four always having to polish his father's bowling trophies after he has won a tournament and the next one has one of the largest trophies he's ever seen waiting to be awarded, and Numbuh 4, desperately wanting to avoid polishing it, has to make sure his father loses the next tournament. How does he do this? By securing an unauthorized release of adult villains, which consist of Count Spankulot, Stickybeard, Soccer Mom and Mr. Boss, and the Toilenator, who desperately wanted to be part of the action. The scheme is soon found out when his teammates come bursting in during the tournament, and Numbuh 4, after his father wins the tournament, has to spend a stint in the arctic prison polishing the trophy.

* Happens on several occasions in ''WesternAnimation/CodenameKidsNextDoor':

[[folder:Film]]

*** Buttercup was an antagonist in "Moral Decay", [[TheToothHurts using teeth beaten out of villains]] [[GetRichQuickScheme for cash]], then resorting to doing so to those who had yet to do anything evil, which is one of her biggest JerkassBall moments. Buttercup, as a result, has [[KarmicInjury her own teeth knocked out]] when beaten up by the villains after Blossom and Bubbles find out what she did behind their backs, and then [[AFoolAndHisNewMoneyAreSoonParted loses all the money she swindled]] [[LaserGuidedKarma when the Professor uses it to pay her dental bills]].

*** Buttercup was an antagonist in "Moral Decay", [[TheToothHurts using teeth beaten out of villains]] [[GetRichQuickScheme for cash]], then resorting to doing so to those who had yet to do anything evil, which is one of her biggest JerkassBall moments. Buttercup, as a result, is beaten up by the villains and [[KarmicInjury her own teeth are knocked out]] after Blossom and Bubbles find out what she did behind their backs, and then [[AFoolAndHisNewMoneyAreSoonParted loses all the money she swindled]] [[LaserGuidedKarma when the Professor uses it to pay her dental bills]].

*** Buttercup was an antagonist in "Moral Decay", [[TheToothHurts using teeth beaten out of villains]] [[GetRichQuickScheme for cash]], then resorting to doing so to those who had yet to do anything evil, which is one of her biggest JerkassBall moments. Finally, the villains beat her up and [[KarmicInjury has her own teeth knocked out]] after Blossom and Bubbles find out what she did behind their backs, and then [[AFoolAndHisNewMoneyAreSoonParted loses all the money she swindled]] [[LaserGuidedKarma when the Professor uses it to pay her dental bills]].

* ''WesternAnimation/ThePowerpuffGirls'':
** Buttercup was an antagonist in "Moral Decay", using teeth beaten out of villain for cash, then resorting to doing so those who had yet to do anything evil, which is one of her biggest JerkassBall moments.
** Blossom's golf club-stealing incident in "A Very Special Blossom."
** The Mayor becomes one in "Hot Air Buffon" when he tries to fight crime without the girls by using a hot air balloon with a boxing glove, but he ends up injuring innocent people, so the girls have to stop him.
** Bubbles twice: "Bubblevicious" where she becomes too aggressive and "Los Dos Mojos" where she loses her memory and terrorizes Townsville under the belief she's Mojo Jojo.

* WesternAnimation/{{Rocko|sModernLife}} in "Power Trip" after ignoring Mr. Smitty who told him, "Don't push the green button!"

* Agent Washington from ''Machinima/RedVsBlue'' is temporarily half of a BigBadDuumvirate during the latter part of ''Machinima/RedVsBlueTheRecollection'', but at the end returns to the heroes' side and stays there for the rest of the show.

** In "The Ex" he tries to help Rob destroy Banana Joe, and explodes the Tobias' house, clearly hurting him (Tobias may be a JerkAss, but it's [[DisproportionateRetribution worse that he deserves]].

* A slight subversion in ''VideoGame/ArtOfFighting'', in which [[{{Bifauxnen}} King]] and [[SNKBoss Takuma]] were originally cast as villains who worked for series antagonist, [[BaldOfEvil Mr.]] [[TheDragon Big.]] The former was forcibly conscripted after being beaten by Jack and his gang, while the latter was blackmailed, by Mr. Big, who had [[IHaveYourWife kidnapped Takuma's daughter, Yuri.]]

* ''VideoGame/{{Shantae}}'' ends up turned evil after her foe, [[BigBad Risky Boots]] sabotaged her uncle's invention. Her friends use ThePowerOfFriendship to turn her back in a cutscene (or DLC) and then she is back to normal.

* ''Webcomic/EerieCuties'': Chloe underwent a period of villainy when she donned the [[AmplifierArtifact Doom Panties]] prematurely. This caused her crush on [[spoiler: Layla's fiance, Dio]], along with her feelings of inadequacy, to draw out her SuperpoweredEvilSide. Thankfully, she got better and is back to [[https://pixietrixcomix.com/eerie-cuties/2012-05-23 her lovable self.]] ...And promptly shipped off to a spin-off series.

* In ''WesternAnimation/RoswellConspiracies'', this happens to Sh'lainn twice;

* Wrestling/ShawnMichaels was basically always a face after his comeback in 2002, but he turned evil for about a month to beat up Wrestling/HulkHogan. Literally the night after the match he was back to being a good guy.

* ''WesternAnimation/TheFairlyOddParents'': Jorgen Von Strangle in the episode "Action Packed!". While he's normally merely a JerkAss (albeit with a HiddenHeartOfGold), Timmy's wish that his life was an action movie turns Jorgen into an action movie villain, who kidnaps fairies and uses a machine to suck the magic energy out of them and transfer it to himself, making him even more powerful and gigantically muscle-bound. Luckily, he's returned to normal when the wish is unwished.

This is for when a character who is normally neutral, good or just normally non-villainous, temporarily switches sides and/or has a noticeable temporary drop in morality. May be caused and justified by a character being NotHimself. Otherwise NegativeContinuity will likely play a huge role. The latter is especially true in nonsensical and farcical comedies where consistency is not a strong element. The character will go back to being his or her old self by either the end of the episode or the next episode.

* In the Black Rose duelist arc of ''Anime/RevolutionaryGirlUtena'', some of the people Utena has to fight are her brainwashed friends.

[[folder: Asian Animation]]
* ''Animation/BoBoiBoy'': When [[ShockAndAwe BoBoiBoy Lightning]] got kidnapped and "tortured" by the bad guys, he transformed into the ruthless [[NextTierPowerUp BoBoiBoy Thunderstorm]] upon reaching his RageBreakingPoint. Due to his worsening memory from [[LiteralSplitPersonality being split up for too long]], he easily believes the villains are his friends and becomes one himself for the rest of the episode by [[CriminalAmnesiac by attacking his friends and the other elementals]]. Once his memory returns, he becomes good again.