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* ''WesternAnimation/AdventureTime'': The Ice King to nearly every princess on the show, usually capturing her with the intent to marry her.
%%** [[spoiler: Tree Trunks becomes this to Finn after eating The Crystal Gem Apple and to turn into Quartzion the Crystal Queen]].
%%** As of the season three finale, add Flame Princess to the list for [[spoiler: Finn]].
%%** Tiffany towards Jake the Dog, to levels of great disturbance.
* ''WesternAnimation/AladdinTheSeries'':
** Sadira is a "street rat" like Aladdin was, and falls for Aladdin the way he did for Jasmine, but, since he's in love with Jasmine he refuses her. Then she stumbles onto an ancient library of forgotten magic, and the end result is increasingly dangerous plots to get rid of Jasmine and take Aladdin for herself, including rewriting reality at one point and altering his mind. Eventually she gets over her crush and befriends the gang, but almost has a brief relapse when she believes they don't trust her.
** Jasmine, due to CriminalAmnesiac, becomes this in "Forget Me Lots". She only returns to normality[[note]]and stops trying to kill Aladdin[[/note]] when Aladdin remembers their anniversary.
* ''WesternAnimation/AmericanDad'':
** Francine Smith has shown these tendencies towards her entire family, but most of the time it is directed toward her son Steve. The whole thing gets taken to an especially creepy length in the episode "Iced Iced Babies".
--->'''Francine:''' You can stay right here. With mommy. ''Forever''.
** When Hayley Smith gets dumped, '''[[BerserkerRage she burns down forests]]'''.
** Stan gets this way when someone starts dating his mother.
--->'''Stan:''' Francine, I can explain. SHE'S ''MY'' MOMMY.
* Azula from ''WesternAnimation/AvatarTheLastAirbender'' fits this when you think about. Her entire Villainous Breakdown is caused by Mai and Ty Lee turning on her for Zuko, who she is thereafter ready to kill on sight. One can also say she is a yandere for the position of Fire Lord in general. For [[spoiler: when she is put into a fire nation mental asylum and is presented with the chance to aid Zuko in finding their mother, she states that he need not reward her, for serving the Fire Lord is reward enough]]. And all things considered...
* Amora the Enchantress in ''WesternAnimation/AvengersEarthsMightiestHeroes'' is this to Thor. She takes out her anger from being rejected by him in battle with Thor and his allies frequently. This follows along with her comic book character.
* ''WesternAnimation/BatmanTheAnimatedSeries'':
** Harley Quinn from Batman. She made her first appearance as SelfDemonstrating/TheJoker's girlfriend.
** Firefly in "Torch Song." He had a shrine to the singer Cassidy in his apartment.
** The Mad Hatter, for Alice. He put her boyfriend under mind control and made him break up with her.
* "Cynthia", the RobotGirl from the ''WesternAnimation/BatmanBeyond'' episode "Terry's Friend Dates a Robot". She tries to push over lockers on a 'rival', and the 'just be friends' talk makes her rather volatile.
* Somewhat Elena Validus turned into this to Ben in ''WesternAnimation/Ben10UltimateAlien'' episode "Revenge of the Swarm".
* In ''WesternAnimation/Ben10Omniverse'', Princess Looma comes off as one of these thanks to being raised in a ProudWarriorRaceGuy society. Her attempts to make Kevin honor their engagement are extremely violent and destructive. This quote says it all:
-->"I will fight for your love, even if I have to break every bone in your body!"
* Magpie of ''WesternAnimation/BewareTheBatman'' became this due to being WrongGenreSavvy from Batman showing her kindness and visiting her in prison. She thought it was an example of DatingCatwoman.
* In one episode of ''WesternAnimation/TheBoondocks'' Granddad meets an incredibly hot woman over the internet. We later learn that she's also a martial arts master RaisedByWolves, has a ''very'' bad history with previous boyfriends (whom she killed) and has a friend who gives her terrible advice. The episode ends with the Freemans managing to calm her down [[spoiler:after which, her friend [[DrivenToSuicide drives her to kill herself]],]] to the relief of the other characters.
* Panini on ''{{Chowder}}'' is obsessed with the title character, to the point where it's scary at times.
-->"I just wanted to pass laws to make you my property!"
* Lizzie from ''WesternAnimation/CodenameKidsNextDoor'' is Nigel's {{clingy jealous girl}}friend, who can go from [[{{Kawaiiko}} sweet and cutesy]] into an UnstoppableRage in seconds when things don't go her way. Oddly enough, ''she's'' the one who [[spoiler:breaks up with Nigel]].
%%* In one rather disturbing Disney example, Daisy Duck becomes one in ''[[http://www.youtube.com/watch?v=S-nnoNgwY3k Donald's Dilemma]]''.
* ''WesternAnimation/DextersLaboratory'' Mandark seems to be this for Dee Dee shown by his obsessive love for her and the fact that he never gives up even though she has no feelings towards him and even hates him. Mandark is definitely an evil stalker for Dee Dee, even though he would never intentionally harm her.
%%** The creepy wide-eyed girl in the "Ay Ay Eyes" episode.
%%* Captain Hero from ''WesternAnimation/DrawnTogether''.
* ''WesternAnimation/TheFairlyOddparents'':
** Leading off, [[NamesToRunAwayFromReallyFast Princess Mandie]] (pronounced Man-DIE...which is very fitting). "Nobody leaves me at the altar! '''NOBODY!'''"
** And there's "Just The Two Of Us", where Trixie goes batshit insane on Timmy because he wished that they were the only two people on Earth, and being the AttentionWhore she is, can't handle not being worshiped by a huge number of boys, Timmy not being able to keep up with her demands.
** Or Super Bike, an animated bike, towards Timmy.
* ''WesternAnimation/FamilyGuy'':
** Quagmire marries one (Joan) in the episode "I Take Thee Quagmire" and Peter convinces him to get a divorce using champagne and Lois's breasts, and when he tries to broach the subject she threatens to cut herself with a kitchen knife and then cut him.
--->"I '''love''' you, Glen..." ''(SlasherSmile)''
--->"And I love you too, Crazy Woman I'm Having Second Thoughts About!"
** Meg shows instances of this. An example? She became this for Brian in "Barely Legal".
** Stewie has also shown to be quite the {{Yandere}} towards whoever he may express an attraction to or fall in love with, [[DepravedBisexual male or female]].
* Yo towards Chum Chum in ''WesternAnimation/FanboyAndChumChum''. She's obsessed with taking him home, dressing him up in a sailor outfit, and putting him on her toy shelf. She even trapped him in a giant virtual pet case at one point. Also a GenkiGirl.
* Berry from ''WesternAnimation/FostersHomeForImaginaryFriends'' acts sweet and kind, but is homicidally jealous of anyone who she sees as a threat to her relationship with Bloo, which is even more imaginary than she is.
* ''WesternAnimation/{{Futurama}}'':
** The Planet Express Ship. She tries to kill herself and the rest of the crew after Bender breaks up with her.
** Bender himself towards Fry, albeit platonically. When Fry discovers his old dog Seymour's corpse fossilized in a museum, Bender becomes increasingly jealous until, when Fry announces he's going to clone Seymour, Bender grabs the fossil and ''throws it into a live volcano'' (in a near-literal KickTheDog), screaming that he's never, ever going to let himself be replaced as Fry's best friend if he can help it.
* ''WesternAnimation/GeneratorRex'':
** Breach towards the titular ''WesternAnimation/GeneratorRex''...sort of. While she does have an unhealthy obsession with him ([[ImTakingHerHomeWithMe kidnapping]] him to make him her boytoy, and refusing to let him go even when her life was in danger because of him) it's never been confirmed that she likes him romantically. (If we take her literally, she just thought Rex would be a great action figure.) There's enough evidence for fans to [[AlternativeCharacterInterpretation run with, though]].
** For a definite example, there's that CreepyChild minion of Breach's. She's never named, but she's absolutely obsessed with making Breach happy and tries to kill Rex when she realizes Breach likes Rex more.
* ''WesternAnimation/GravityFalls'':
** Lil' Gideon is one towards Mabel. [[spoiler: When Gideon (wrongfully) thinks that [[FriendVersusLover Dipper has come between him and Mabel]], he attempts to [[MurderTheHypotenuse murder Dipper with a pair of lamb shears]]. After Mabel stops him, Gideon then proceedes to tackle Dipper out of the window - an act that would [[TakingYouWithMe have resulted in both of their deaths]], had Mabel not saved them]].
** In Season 2, we are treated to [=.GIFfany=], a love interest in a Japanese DatingSim who turns out to be sentient. When Soos buys and plays the game, she becomes incredibly possessive of him, believing him to be her boyfriend and going on a rampage when he goes out with a "real" girl.
* ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'': Nergal Jr desperately wants friends but if someone refuses to be his friend, he freezes them and takes their form.
%%** Puddin's rabbit from the wishing skull episode.
* ''WesternAnimation/{{Grossology}}'' : Kid Rot or "Chester" is this for Abby, at first his feelings for her seem innocent and good natured but that's before the parasite that gives him his "rotting touch" corrupted his mind. After that point his love for Abby turned into a psychotic infatuation for her (who ultimately hates him, at least his prevalent Kid Rot persona), and will stop at nothing to win her heart, even going as far as to rot the entire world.
* In an episode of Disney's ''Disney/{{Hercules}}'' cartoon, Hercules gets an idea when he learns about Pygmalion and tries to make his own dream girl out of clay. Unfortunately, being a hormonal teenager, all the personality he can think to give her is "in love with me". Aphrodite, who Hercules has called to assist in this endeavor, snarks on the poorly-thought-out idea, but brings her to life anyway. Naturally, after Hercules gets tired of her ClingyJealousGirl tendencies, she shows off her Yandere tendencies. By the end of the episode, Aphrodite gives her a ''real'' personality... one that just doesn't care much for Hercules at all.
* ''WesternAnimation/HeyArnold''
** At the end of Arnold's NightmareSequence we see Arnie go stark raving mad when he thinks Arnold was trying to steal his girl, Lulu.
** Helga is a mixture of this and {{Tsundere}}. She varies between hating and loving Arnold and is obsessed with him to the point of stealing his favorite hat for her StalkerShrine made of his bubblegum. She also tends to write poetry about him and swoon over a picture of him in private and has made other shrines of him which she would dance around as if she were worshiping him like he was a God. She shows a slightly unstable side with the lengths she was willing to go to as a way to prevent her parrot (who had heard her say a love poem for Arnold revealing her feelings for him) from repeating the poem to Arnold who had taken it as his pet. She also shows jealousy towards girls Arnold is interested in, like Ruth and Lila, and would occasionally try to sabotage Arnold's relationship/dates with them. She even threatened to ''strangle'' Lila if she ever told anyone that Helga liked Arnold because she wasn't ready to tell him yet. She also disguised herself as Arnold's foreign pen-pal in order to go on a date with him.
** Lila becomes this in an episode depicting the future towards Arnold when she is shown pining over him to a desperate degree after he and Helga are married.
* ''Disney/TheHunchbackOfNotreDame'': Frollo is a strange one. It's certainly not love, for obvious reasons. It's also not just the desire for sex, because then ''any'' woman would suffice. It's more like an unhealthy obsession. Which, of course, fits the definition of {{Yandere}} to a tee. Now throw in a ridiculously rigid version of catholic sexual moral, and you get one of the greatest Disney villains of all time.
--> "Destroy Esmeralda, and let her taste the fires of Hell! [[MoodSwinger Or else let her be mine and mine alone..."]]
* Whitney Stane from ''WesternAnimation/IronManArmoredAdventures''. Her feelings for Tony appear to be yandere, becoming violent if there is a possible threat to Tony's life, [[spoiler: even going so far as to try to kill her own father as she believed he was trying to harm Tony]].
* Heloise on ''WesternAnimation/JimmyTwoShoes''. Among the things she's done when Jimmy hasn't noticed her is doing a FreakyFridayFlip on Beezy and Cerbee and fusing Jimmy and Beezy together. There's also "Best Bud Battle", where Heloise chains Jimmy up to keep him from leaving her and locks him in a tiny cage.
%%** Max the Weavil gets to be this toward Beezy [[HoYay fairly quickly...]].
* ''WesternAnimation/TheLegendOfKorra'': Korra's cousin [[EmotionlessGirl Eska]] is ''extremely'' possessive of her boyfriend/slave Bolin. When he breaks up with her, she gives chase - over the open sea, using [[MakingASplash waterbending]] - wearing the most ''terrifying'' NightmareFace ever seen on the show.
* In one ''WesternAnimation/LooneyTunes'' cartoon, Daffy must exorcise a possessed heiress, though there's open room for interpretation that she was actually one of these.
* In ''WesternAnimation/TheLooneyTunesShow'', Lola becomes this for WesternAnimation/BugsBunny. Her song [[http://www.youtube.com/watch?v=puYJ0Ojp5cI&feature=youtu.be "We Are In Love"]] sums it up nicely.
%%* [[spoiler:Titan]] is one towards Roxanne in ''WesternAnimation/{{Megamind}}''.
* Cookie [=BaBoom=], Mayor Tilton's ex-girlfriend on ''WesternAnimation/TheMask'' episode "Flight as a Feather." Uses a variant of the StockPhrase, "[[IfICantHaveYou If I can't have you, then no one can]]" (on the episode, it was, "If I can't have [[EmbarrassingFirstName Mortimer]], then no one can!" Standard. Is still bitter over being dumped by Mayor Tilton? Okay. Uses two strategically placed explosive belts strapped around her body to [[DrivenToSuicide kill herself]], [[ThereIsNoKillLikeOverkill the mayor, and everyone else around her]] because of the deep-seated resentment she has over being dumped. Bingo! Fortunately the Mask defeated Cookie by subjecting her to a hilarious ShamefulStrip.
* ''WesternAnimation/MyLifeAsATeenageRobot'' has a character Sheldon Lee who was first introduced in (''Attack of The 5 1/2 foot Geek''). He has an unhealthy obsession with Jenny, although he hasn't become homicidal in the show due to it being a kids show. He is shown to stalk her regularly (and thinks it's normal, which could show he's a little sick in the head), has a shrine to her and is willing to go to extreme lengths to have her, and NEVER gives up. Even though he isn't a skilled fighter physically, he is extremely intelligent and is perfectly able to create a weapon that could deal great damage to anyone who gets in his way of his affections for Jenny.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' has one episode (''The Best Night Ever'') where ''Fluttershy'' of all ponies turns into a {{Yandere}} for a bunch of animals. She at first tried being nice and encouraging them to come out and see her, but then she snaps and sets up a few traps to capture them. Her frustration leads to her screaming a pretty yanderific line.
--> "You're going to '''LOVE ME'''!"
** Fluttershy is on the recieving end of a platonic version in ''Make New Friends But Keep Discord'', where Discord [[SarcasmMode slighlty overreacts]] to her inviting a different friend to the Gala instead of him. Discord is a RealityWarper MadGod, by the way. HilarityEnsues. He eventually goes so mad with jealousy that he ''[[MurderTheHypotenuse threatens to send Fluttershy's new friend to another dimension]]''.
* One episode of ''WesternAnimation/TheOblongs'' had Helga Phugly become one towards Milo because she wants him to take care of her due to [[spoiler: her parents being absent]].
* ''WesternAnimation/ThePenguinsOfMadagascar'': In a semi-HoYay semi-{{Fetish}}-specific variation, Mort behaves like this towards King Julien's feet. It's never actually put into words why, but ...
* Gerald in ''WesternAnimation/PerfectHairForever''. He starts as a relatively "normal" character, but come the April Fool's final episode, he's revealed to have a crush on Brenda (despite her cutting off his ear at the beginning of the series -- [[WidgetSeries it's that kind of show]]) and starts going crazy over the fact that Young Man is going to marry her. He attempts to use some hamburger necklace thing to mind-control Brenda to love him, and when that fails, [[MurderTheHypotenuse he tries sniping Young Man at the altar outright]]. The show cuts to black before the results are shown, it's not completely revealed if he killed him or not.
%%* Suzy Johnson, Jeremy's clingy, CreepyChild little sister from ''WesternAnimation/PhineasAndFerb''.
* ''WesternAnimation/TheProblemSolverz'': Katrina Rad is obsessed with Roba and stalks him in "Magic Clock". She then steals a time-freezing clock so the two of them can be together ''for eternity'' and tries to marry him against his will. When Roba refuses to kiss her at their wedding, she threatens to rip a hole in the fabric of the space-time continuum.
* The eponymous character of ''Animation/{{Pucca}}''. She's smitten over Garu, but since he thinks GirlsHaveCooties, he's not having any of it. ''Ever.'' Except this one time... [[spoiler:when Garu is told to get Pucca to [[BirthdayEpisode her birthday party]] while she [[OcularGushers cries a waterfall]], and he sucks it up for a couple seconds to blow her a kiss to get her spirits up]].
* An episode of ''WesternAnimation/RegularShow'' has Starla, Muscle Man's old girlfriend. She falls in love with Mordecai, and he starts dating her just so he can get her and Muscle Man back together. But when Mordecai can't take it anymore and breaks up with her... [[WomanScorned well...]]
* In a ''WesternAnimation/RobotChicken'' sketch, [[http://video.adultswim.com/robot-chicken/lisa.html Lisa the on-board GPS cares a little too much where her driver is going]].
%%** Another one had [[https://www.youtube.com/watch?v=APzFLPbJZcs&ab_channel=AdultSwim Sally Brown as one]] in a parody of ''Film/{{Misery}}''.
%%* The Bride of Gingy in ''[[WesternAnimation/{{Shrek}} Scared Shrekless]]''. . . .
* ''WesternAnimation/TheSimpsons'': One-shot character Julia was one of these towards Homer in the episode "Homer Of Seville". She tries to seduce Homer, but he refuses. Not accepting refusal, she tries to kill Homer.
%%** Pierce Brosnan Ultrahouse on "Treehouse of Horror XII."
%%* In TheLegendOfTarzan, Queen La was a yandere towards Tarzan, especially in her debut episode.
* Wendy, Stan's love interest/girlfriend in early seasons of ''WesternAnimation/SouthPark''. She went so far as to have a substitute teacher [[spoiler:(later revealed to be lesbian)]] arrested on false charges and locked inside a rocket launched directly at the sun, for the crime of having been the object of a brief crush from Stan.
-->Simple rule to follow: "[[http://www.youtube.com/watch?v=ahg3lwjrRtA Don't. Fuck. With. Wendy. Testaburger]]"
* ''WesternAnimation/SpongebobSquarepants'': The episodes Valentine's Day and Nature Pants depict Patrick as having these tendencies [[HoYay towards Spongebob]].
--> "You're gonna look good on my mantle!"
* On ''WesternAnimation/{{Squidbillies}}'' Early Cuyler for his ex-wife Krystal
--> "I love you ''(waves knife around)'' Imma kill you bitch."
* During one episode of ''WesternAnimation/TeenTitans'', Starfire shows a few Yandere tendencies when [[BrattyTeenageDaughter Kitten]] blackmails Robin into going to her high school prom with her. At one point, she crushes the front end of a car with a single punch. She stops once the forced date plotline is resolved. Of course, there's the part where she rises out of the punch bowl like an [[BizarreAlienBiology alien]] ''Film/{{Jaws}}'' [[EldritchAbomination abomination]]. ([[http://www.youtube.com/watch?v=L6OBqLva24Q&feature=relmfu 2:01]])
* ''WesternAnimation/TotalDrama'':
** ''World Tour'' introduces Sierra, an in-universe {{ascended fan}} who has an enormous crush on [[ExtravertedNerd Cody]] and spends the entire season invading his personal space, going through his belongings, and violently fending off anyone she views as a threat. Cody is repulsed by her behavior but is also [[LonelyRichKid touched that she cares so much about him]]. In "Planes, Trains, and Hot Air Mobiles", he offers to be her friend on the condition that she start treating him like a person instead of a toy, and she happily accepts.
** ''The Ridonculous Race'' has Emma, who seems perfectly levelheaded but has a bad case of LoveMakesYouCrazy (which is why her previous boyfriend left her). She begins planning a wedding immediately after getting together with [[spoiler:Noah]] and later attempts to take a lock of his hair as a keepsake. [[spoiler:Oddly enough, Noah isn't the least bit creeped out and is fine with the idea of being a stay-at-home husband while Emma pursues a career in law]].
* Cyclops was this to Jean Grey on ''WesternAnimation/WolverineAndTheXMen'' due to the unhealthy nature of their relationship. And Jean is this in turn to him somewhat in the finale.
%%* Word Bot to Tobey in ''WesternAnimation/WordGirl''.