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* “WesternAnimation/TheLoudHouse” goes to so far as to name the episode “The Butterfly Effect”, setting viewers up to know what’s in store. When Lincoln loses control of his yo-yo and destroys a project Lisa’s been working on, he decides not to tell her, instead choosing to walk away and say “What’s the worst that could happen?” [[spoiler: Without supervision, the chemicals cause an explosion, blowing up a hole in the wall where Lori and Leni’s closet is. When examining it, Lori finds a signed picture of her boyfriend hidden on Leni’s side, which Leni says he gave to her to hide, but she forgot where it was. Lori gets mad because her boyfriend got her socks for her birthday ( probably because Leni forgot about the real present), and thinks that he is cheating on her with Leni, prompting her to break up with her bf and date Clyde instead. As she slams the door on her way out, the railing in the closet comes loose, and hits Leni on the head, knocking her out. When she wakes up, she is super intelligent, going off to college and inventing cars that run on apple juice. Her smartness makes Lisa feel inferior, and she gives up the pursuit of knowledge and drops out of school to work at a gas station. Without Lisa or any smart sibling to tutor her, Lynn fails her classes and gets kicked off all her sports teams as consequences. Frustrated, she kicks a ball right as Lola is coming down the stairs. The ball hits her in the face and disfigures her, ending her pageant career and driving her to run away from home with Lynn, they become fugitives. Lola’s accident makes Lana overly conscious for her own safety, and she enclosed herself in a plastic bubble. Luna writes a song about all the new chaos going on that goes viral, catching the attention of her favorite rock star, who takes her to go on his tour, which she’s later kicked off of for wrecking a hotel room. Without a roommate to practice her jokes on, Luanne passes time watching the news, and sees all the injustice of the world, inspiring her to give up comedy and become an activist. One of her acts is freeing all of Lana’s exotic pets, including a vampire bat who bites Lucy and turns her into a vampire. Worst of all, Lily, who shares a room with Lisa, is turned into a giant from exposure to the chemicals. Turns out, it was all a fantasy sequence, to which Lincoln replies, “So THAT’S the worst that could happen.”]]
* ''WesternAnimation/StarTrekTheAnimatedSeries'', "Yesteryear", in which Spock and Kirk find themselves in an alternate timeline where a young Spock died and an Andorian is in Spock's place. As it turns out, [[spoiler:Spock's SetRightWhatOnceWentWrong by posing as his older cousin is part of a StableTimeLoop and the alternate timeline was because he took too long with his earlier trip through the Guardian of Forever.]]
* ''WesternAnimation/{{Futurama}}'':
** The entire series would not have happened if A) Fry hadn't run into Bender at the suicide booth, B) They didn't run into Leela at the diner, C) If it wasn't Tuesday when Fry and Bender went to the head museum, D) If Bender hadn't broken a lightbulb on his antenna, changing his programing, and E) If the professor didn't have his previous crew's career chips with him on the ship. This is subverted with [[spoiler: Fry falling into the tube in the beginning because it is later revealed that Nibbler knocked him in to help save the world in the future.]]
** "The Farnsworth Parabox," which features a universe "exactly like ours" except for the fact that the results of all coin tosses (or at least those in the recent past) are reversed. (According to the DVD commentary, it's a probability maths injoke.) This leads to results like Bender being gold-plated, and Fry and Leela being married. [[BizarroUniverse Oh, also the colors are all mixed up, the sky is bright and swirly and the background music is a Theremin.]] How'd we forget that? Other perpendicular universes (parallel universes, like the cowboy universe, never intersect) are visited, including a universe where everyone lack eyes, where their heads are bobble-heads, where everybody is a robot, a Roman Empire-themed universe (complete with Roman numerals calculus) and a hippie universe... however there do seem to be universes without the main characters, such as an octopus universe, a universe filled only with women and a completely frozen universe.
** In "All the President's Heads", the gang travels back in time to UsefulNotes/TheAmericanRevolution to stop Prof. Farnsworth's ancestor David, who betrayed the Revolutionaries by counterfeiting money. After they stop David, Fry burns the counterfeit bills with a lantern he found in a church, which turned out to be one of the lamps used to signal the coming of the British (one if by land, two if by sea). Because of this, the British win the war and the gang come back to an America that's still under British rule.
** In "The Devil's Hands Are Idle Playthings", Robot Devil sets up a "[[DealWithTheDevil ridiculously circuitous plan]]" that bounces from Bender, Calculon, Leela, and Fry's opera which ends with either him marrying Leela or getting his robot hands back from Fry.
* ''WesternAnimation/TheFairlyOddParents'':
** Most of Timmy's time traveling adventures in backfire because he doesn't realize until it's too late that ''he'' was the nail that made things go wrong; for instance, a StableTimeLoop involving Mr. Crocker's obsession with fairies.
** Not to mention the episode where he wishes he was never born. Tuns out his gender is a nail as well - his parents had a girl instead, and the life of everyone Timmy knows is better for it.
** There was also the episode "Father Time" where Timmy, after melting his dad's trophy with Heat Vision, goes with Cosmo's crazy idea to go back and time to stop his father from ''winning'' the "stupid trophy" in the first place. When that happens, Timmy's dad gets the last place prize; an all expenses paid mandatory twelve year scholarship to Lil' Tyrant Dictator School. The result... a BadFuture where Mr. Turner rules the Earth from his headquarters in Dimmsdale with an iron fist of [[StepfordSmiler creepy happiness]], treats all of his subjects as his children, and never got to marry Mrs. Turner. Therefore, Timmy Turner (by technicality) no longer exists and loses his godparents (who vanish JUST before the revelation of Dictator School).
* In the ''WesternAnimation/TotallySpies'' episode "Futureshock," the spies' rival, Mandy, breaks a nail during a cheerleading practice (the incident possibly being a DoubleEntendre) and being the vain, shallow type she is, believes this makes her flawed. After David suggests she take up student broadcoasting until her fingernail grows back (since no one will see her hands while she's at a newsdesk), Mandy does so and develops a liking for it. After the spies are accidentally sent into the future (where Mandy now rules Beverly Hills and has renamed it "Mandy Hills"), they discover that Mandy (now with her own TV-network and numerous TV-shows about herself) went from having just one talk show at Beverly Hills High School to running "Mandy Media Enterprises" all in the span of just a month--they also discover that Mandy plans to TakeOverTheWorld by "Mandifying" the entire planet. Fortunately, the heroines (teaming up with their future selves) manage to defeat her, and after being sent back to their original time period, they get some WOOHP-issue nail polish to stash in Mandy's locker, which (after putting it on her nails) makes her nails regrow and she decides to go back to cheerleading.
* On the fifth season finale of ''WesternAnimation/FamilyGuy'', Peter goes back in time to sow his wild oats and ends up not marrying Lois, who married Quagmire instead. Apparently, their not marrying allowed Al Gore to become President -- and Gore apparently killed Bin Laden, instituted zero-tolerance gun control and universal health care, and fixed the public school system. In addition to all that, Dick Cheney shot Tucker Carlson, Antonin Scalia, and Karl Rove. With one bullet. Brian likes it this way. Whew. Even after they "fix" the time-stream, the present still isn't the same: somehow, [[WesternAnimation/AmericanDad Roger Smith]] ended up in their house.

to:

* “WesternAnimation/TheLoudHouse” goes to so far as to name In the episode “The Butterfly Effect”, setting viewers up to know what’s in store. When Lincoln loses control fifth season premiere of his yo-yo and destroys a project Lisa’s been working on, he decides not to tell her, instead choosing to walk away and say “What’s the worst ''WesternAnimation/AdventureTime'', Finn wishes that could happen?” [[spoiler: Without supervision, [[BigBad the chemicals cause Lich]] never existed, creating an explosion, blowing up a hole in the wall AlternateTimeline where Lori and Leni’s closet is. When examining it, Lori finds a signed picture of her boyfriend hidden on Leni’s side, which Leni says he gave to her to hide, but she forgot where it was. Lori gets mad because her boyfriend got her socks for her birthday ( probably because Leni forgot about the real present), and thinks that he is cheating on her with Leni, prompting her Lich never came to break up with her bf and date Clyde instead. As she slams the door on her way out, the railing in the closet comes loose, and hits Leni on the head, knocking her out. When she wakes up, she is super intelligent, going off to college and inventing cars that run on apple juice. Her smartness makes Lisa feel inferior, and she gives up the pursuit of knowledge and drops out of school to work at a gas station. Without Lisa or any smart sibling to tutor her, Lynn fails her classes and gets kicked off all her sports teams as consequences. Frustrated, she kicks a ball right as Lola is coming down the stairs. The ball hits her in the face and disfigures her, ending her pageant career and driving her to run away be. Things go downhill from home with Lynn, they become fugitives. Lola’s accident makes Lana overly conscious for her own safety, and she enclosed herself in a plastic bubble. Luna writes a song about all there very rapidly. [[spoiler:And to top it off, the new chaos going on that goes viral, catching the attention of her favorite rock star, who takes her to go on his tour, which she’s Lich is born anyway, although several years later kicked off of for wrecking a hotel room. Without a roommate to practice her jokes on, Luanne passes time watching the news, and sees all the injustice of the world, inspiring her to give up comedy and become an activist. One of her acts is freeing all of Lana’s exotic pets, including a vampire bat who bites Lucy and turns her into a vampire. Worst of all, Lily, who shares a room with Lisa, is turned into a giant from exposure to the chemicals. Turns out, it was all a fantasy sequence, to which Lincoln replies, “So THAT’S the worst that could happen.”]]
* ''WesternAnimation/StarTrekTheAnimatedSeries'', "Yesteryear",
than he would have been ''and'' in which Spock and Kirk find themselves in an alternate timeline where a young Spock died and an Andorian is in Spock's place. As it turns out, [[spoiler:Spock's SetRightWhatOnceWentWrong by posing as his older cousin is part of a StableTimeLoop and the alternate timeline was because he took too long with his earlier trip through the Guardian of Forever.radically different form.]]
* ''WesternAnimation/{{Futurama}}'':
** The entire series would not have happened if A) Fry hadn't run into Bender at the suicide booth, B) They didn't run into Leela at the diner, C) If it wasn't Tuesday when Fry and Bender went to the head museum, D) If Bender hadn't broken
In ''WesternAnimation/AlvinAndTheChipmunks'', Alvin wins a lightbulb on his antenna, changing his programing, and E) If the professor didn't have his previous crew's career chips with him on the ship. This is subverted with [[spoiler: Fry falling into the tube in the beginning because it is later revealed that Nibbler knocked him in to help save the world in the future.]]
** "The Farnsworth Parabox," which features a universe "exactly like ours" except for the fact that the results of all coin tosses (or at least those in the recent past) are reversed. (According to the DVD commentary, it's a probability maths injoke.) This leads to results like Bender being gold-plated, and Fry and Leela being married. [[BizarroUniverse Oh, also the colors are all mixed up, the sky is bright and swirly and the background music is a Theremin.]] How'd we forget that? Other perpendicular universes (parallel universes, like the cowboy universe, never intersect) are visited, including a universe
sweepstakes where everyone lack eyes, where their heads are bobble-heads, where everybody is a robot, a Roman Empire-themed universe (complete with Roman numerals calculus) and a hippie universe... however there do seem to be universes without the main characters, such as an octopus universe, a universe filled only with women and a completely frozen universe.
** In "All the President's Heads", the gang travels back in time to UsefulNotes/TheAmericanRevolution to stop Prof. Farnsworth's ancestor David, who betrayed the Revolutionaries by counterfeiting money. After they stop David, Fry burns the counterfeit bills with a lantern he found in a church, which turned out to be
he's offered one of the lamps used to signal the coming of the British (one if by land, two if by sea). Because of this, the British win the war and the gang come back to an America that's still under British rule.
** In "The Devil's Hands Are Idle Playthings", Robot Devil sets up
prizes: $500 or a "[[DealWithTheDevil ridiculously circuitous plan]]" mystery prize that bounces could range anywhere from Bender, Calculon, Leela, and Fry's opera which ends with either him marrying Leela or getting his robot hands back from Fry.
* ''WesternAnimation/TheFairlyOddParents'':
** Most
a free lunch to millions of Timmy's time traveling adventures in backfire because he doesn't realize until it's too late that ''he'' was the nail that made things go wrong; for instance, a StableTimeLoop involving Mr. Crocker's obsession with fairies.
** Not to mention the episode where he wishes he was never born. Tuns out his gender is a nail as well - his parents had a girl instead, and the life of everyone Timmy knows is better for it.
** There was also the episode "Father Time" where Timmy, after melting his dad's trophy with Heat Vision, goes with Cosmo's crazy idea to go back and time to stop his father from ''winning'' the "stupid trophy" in
dollars. He's shown two alternate futures. In the first place. When that happens, Timmy's dad gets the last place prize; an all expenses paid mandatory twelve year scholarship to Lil' Tyrant Dictator School. The result... a BadFuture one where Mr. Turner rules he takes the Earth from $500, he ended up investing it and continuing his headquarters in Dimmsdale with an iron fist of [[StepfordSmiler creepy happiness]], treats all of his subjects as his children, singing career, and never got to marry Mrs. Turner. Therefore, Timmy Turner (by technicality) no longer exists as a result, he and loses his godparents (who vanish JUST before the revelation of Dictator School).
* In the ''WesternAnimation/TotallySpies'' episode "Futureshock," the spies' rival, Mandy, breaks a nail during a cheerleading practice (the incident possibly being a DoubleEntendre)
Brittany are filthy rich, Simon and being the vain, shallow type she is, believes this makes her flawed. After David suggests she take up student broadcoasting until her fingernail grows back (since no one will see her hands while she's at a newsdesk), Mandy does so Jeanette are successful scientists and develops Theodore and Eleanore run a liking for it. After the spies are accidentally sent into booming restaurant business. In the future (where Mandy now rules Beverly Hills and has renamed it "Mandy Hills"), they discover that Mandy (now with her own TV-network and numerous TV-shows about herself) went from having where he takes the mystery prize, he just one talk show at Beverly Hills High School to running "Mandy Media Enterprises" all in the span of just gets a month--they also discover that Mandy plans to TakeOverTheWorld by "Mandifying" the entire planet. Fortunately, the heroines (teaming up with their future selves) manage to defeat her, and after being sent back to their original time period, they get some WOOHP-issue nail polish to stash in Mandy's locker, free lunch which (after putting it on her nails) makes her nails regrow gives who food poisoning, weakening his vocal chords and she decides forcing him to go back give up singing, which causes him and everyone else to cheerleading.
* On
be poor. Ultimately, it was subverted, because when Alvin calls to claim the fifth season finale of ''WesternAnimation/FamilyGuy'', Peter goes back in time to sow his wild oats and ends up not marrying Lois, who married Quagmire instead. Apparently, their not marrying allowed Al Gore to become President -- and Gore apparently killed Bin Laden, instituted zero-tolerance gun control and universal health care, and fixed the public school system. In addition to all that, Dick Cheney shot Tucker Carlson, Antonin Scalia, and Karl Rove. With one bullet. Brian likes it this way. Whew. Even after $500, they "fix" realize he's only a kid and explain to him that he had to be at least 18 to enter the time-stream, the present still isn't the same: somehow, [[WesternAnimation/AmericanDad Roger Smith]] ended up in their house.sweepstakes.



* Subverted in the ''WesternAnimation/FantasticFourWorldsGreatestHeroes'' 2007 animated series episode "Out of Time". While the Four are on a field trip to prehistoric Earth the Thing swats a mosquito, just as Mr Fantastic warns them not to change anything. The camera then pulls back to show he's already killed a dinosaur. Reed later assures him that this can't possibly have had the effect of Dr Doom ruling the world. But when the Torch gives cavemen the secret of fire, he's worshiped as a god in modern New York (although InSpiteOfANail, 15,000 years of Johnny Storm worship hasn't changed anything except the Statue of Liberty).
* WesternAnimation/{{DCAU}}:
** ''WesternAnimation/JusticeLeague'', "A Better World" has an alternate universe where the League is a group of [[WellIntentionedExtremist "well-intentioned" extremists]], set off by the nail being the death of their Flash. [[spoiler:Implications of this episode would face the main continuity for nearly the remainder of the show.]]
** Meta-example with the ''WesternAnimation/BatmanTheAnimatedSeries'' episode "Bane": It's only a well-placed Batarang to Bane's Venom feed that prevents the episode from playing out exactly the way ''ComicBook/{{Knightfall}}'' did.
* ''WesternAnimation/Ben10AlienForce'': In "Time Heals", Gwen goes back in time and stops Ben and Kevin from tampering with the Omnitrix and causing the current mutation that Kevin is suffering and {{Wangst}}ing over. Apparently, Kevin's mutation provided the key to victory in a future battle with Hex and Charmcaster, as they have taken over the city when Gwen gets back to her own time.

to:

* Subverted Parodied in the ''WesternAnimation/FantasticFourWorldsGreatestHeroes'' 2007 animated series episode "Out of Time". While the Four are on a field trip to prehistoric Earth the Thing swats a mosquito, just as Mr Fantastic warns them not to change anything. The camera then pulls back to show he's already killed a dinosaur. Reed later assures him that this can't possibly have had the effect of Dr Doom ruling the world. But when the Torch gives cavemen the secret of fire, he's worshiped as a god in modern New York (although InSpiteOfANail, 15,000 years of Johnny Storm worship hasn't changed anything except the Statue of Liberty).
* WesternAnimation/{{DCAU}}:
** ''WesternAnimation/JusticeLeague'', "A Better World" has an alternate universe where the League is a group of [[WellIntentionedExtremist "well-intentioned" extremists]], set off by the nail being the death of their Flash. [[spoiler:Implications of this episode would face the main continuity for nearly the remainder
one of the show.]]
** Meta-example with the ''WesternAnimation/BatmanTheAnimatedSeries'' episode "Bane": It's only
{{Cold Open}}s of ''WesternAnimation/{{Arthur}}''. The Brain builds a well-placed Batarang to Bane's Venom feed time machine at school so that prevents the episode from playing out exactly gang can explore the way ''ComicBook/{{Knightfall}}'' did.
* ''WesternAnimation/Ben10AlienForce'': In "Time Heals", Gwen goes back in
time of the dinosaurs, and stops Ben and Kevin from tampering with the Omnitrix and causing the current mutation that Kevin is suffering and {{Wangst}}ing over. Apparently, Kevin's mutation provided the key warns his friends to victory stay within marked boundaries in order to avoid messing up time. Unfortunately, Buster just happens to be eating a future battle with Hex and Charmcaster, box of raisins as they went exploring, and the box accidentally falls from his pocket, off the path, and outside the boundaries. It isn't until everyone returns to the school that they realize that they now have taken over scaly, lizard-like limbs, all thanks to that one box. Mr. Ratburn invites them in to class, also having lizard-like legs, and eats a fly as the city when Gwen gets back intro comes to her own time.a close.
* Apparently the fate of all life on Earth in ''WesternAnimation/TheAvengersEarthsMightiestHeroes'' depends entirely on whether or not [[spoiler:Captain America approves of Black Panther performing a HeroicSacrifice to stop the Kree from destroying the sun]].



* ''WesternAnimation/{{Freakazoid}}'' inverts this. The titular hero ends up at Pearl Harbor in December 1941 and stops the Japanese from invading. When he comes back to the present, the world seems to be a better place: Sharon Stone can act, Radio/RushLimbaugh's a "bleeding-heart liberal", [=EuroDisney=] is booming, cold fusion works, and there are no Chevy Chase movies. Just one catch: [[spoiler:[[WesternAnimation/PinkyAndTheBrain the Brain]] is President.]]
* ''WesternAnimation/TheSimpsons'':
** Inverted by having Homer's guardian angel [[Series/HogansHeroes Werner Klemperer]] show Homer what his life would have been like had he not married Marge. In the alternate timeline, Homer is rich and happily married to a beautiful woman, while Marge is the President, enjoying both success and popularity. Needless to say, this was not a successful trip for the guardian angel.
** In a "Treehouse of Horror" sketch, the Butterfly Effect is taken to ridiculous extremes as Homer keeps traveling back in time and each time he steps on something, it changes the future in wildly differing ways. He comes to a future where the family is wealthy, his sisters-in-law are dead... but no one has heard of donuts. Homer runs back in time screaming (meanwhile it is raining donuts outside) and just indiscriminately squashes whatever is around him. He comes back to find everything normal... except everyone has forked, lizard-like tongues. He shrugs: "[[CloseEnoughTimeline Close enough]]."
* In the ''WesternAnimation/PhineasAndFerb'' epsiode "Phineas and Ferb's Quantum Boogaloo", future Candace travels back in time and helps her younger self bust Phineas and Ferb on the first day of summer. When she returns to her own time, she discovers this act has lead to the tri-state area becoming a dystopia ruled by Doofenshmirtz. She then has to travel back in time again and stop herself from helping her younger self from busting her brothers.

to:

* ''WesternAnimation/{{Freakazoid}}'' inverts this. The titular hero ends up at Pearl Harbor in December 1941 and stops the Japanese from invading. When he comes back Similar to the present, the world seems to be a better place: Sharon Stone can act, Radio/RushLimbaugh's a "bleeding-heart liberal", [=EuroDisney=] is booming, cold fusion works, and ''Popeye'' example, there are no Chevy Chase movies. Just one catch: [[spoiler:[[WesternAnimation/PinkyAndTheBrain the Brain]] is President.]]
* ''WesternAnimation/TheSimpsons'':
** Inverted by having Homer's guardian
was a ChristmasEpisode of ''WesternAnimation/BeavisAndButtHead'' where an angel [[Series/HogansHeroes Werner Klemperer]] show Homer what his shows Butt-Head how life would have been be without him, showing things like had he not married Marge. In the alternate timeline, Homer is rich Principal [=McVicker=] being normal and happily married to Beavis working at a beautiful woman, while Marge is the President, enjoying both success and popularity. Needless to say, soup kitchen with Stewart. Despite this, Butt-Head's influence still permeates into this was not a successful trip for the guardian angel.
**
universe, too.
* ''WesternAnimation/Ben10AlienForce'':
In a "Treehouse of Horror" sketch, the Butterfly Effect is taken to ridiculous extremes as Homer keeps traveling "Time Heals", Gwen goes back in time and each time he steps on something, it changes stops Ben and Kevin from tampering with the future Omnitrix and causing the current mutation that Kevin is suffering and {{Wangst}}ing over. Apparently, Kevin's mutation provided the key to victory in wildly differing ways. He comes to a future where battle with Hex and Charmcaster, as they have taken over the family is wealthy, his sisters-in-law are dead... but no one has heard of donuts. Homer runs city when Gwen gets back in time screaming (meanwhile it is raining donuts outside) and just indiscriminately squashes whatever is around him. He comes back to find everything normal... except everyone has forked, lizard-like tongues. He shrugs: "[[CloseEnoughTimeline Close enough]]."
* In the ''WesternAnimation/PhineasAndFerb'' epsiode "Phineas and Ferb's Quantum Boogaloo", future Candace travels back in time and helps her younger self bust Phineas and Ferb on the first day of summer. When she returns
to her own time, she discovers this act has lead to the tri-state area becoming a dystopia ruled by Doofenshmirtz. She then has to travel back in time again and stop herself from helping her younger self from busting her brothers.time.



* ''WesternAnimation/RobotChicken'':
** A sketch shows what would happen if jerks got a time machine. It ends with one jerk stopping Nazism from ever getting started by humiliating Hitler, thus becoming a Hero with a Time Machine.
** In a parody of ''WesternAnimation/{{Popeye}}'', an angel shows Wimpy what would have happened if he did not exist when Wimpy attempts suicide. Popeye and Brutus are friends, Olive has huge breasts, Goon gains a doctorate, there is no war, and all hamburgers are free. The angel, seeing that he failed, pushes Wimpy off the bridge.
** In a parody of ''Literature/IfYouGiveAMouseACookie'', the mouse tries to wash down the cookie with the boy's mother's breast milk, but accidentally drinks her blood instead, turning him into a vampire, who makes various people his followers, on whom the US government declares a nuclear war, which other countries get involved in, destroying the whole world. [[spoiler:The ending reveals this as a story the mother tells the boy, to explain why she killed her husband for "giving a mouse a cookie".]]
* Similar to the ''Popeye'' example, there was a ChristmasEpisode of ''WesternAnimation/BeavisAndButtHead'' where an angel shows Butt-Head how life would be without him, showing things like Principal [=McVicker=] being normal and Beavis working at a soup kitchen with Stewart. Despite this, Butt-Head's influence still permeates into this universe, too.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** In the episode "The Cutie Mark Chronicles", [[BoisterousBruiser Rainbow Dash's]] first Sonic Rainboom actually indirectly caused all the rest of the Mane Six to get their own cutie marks [[note]]as well as [[UnreliableNarrator helping Pinkie Pie "create Equestria"]][[/note]].
** In "It Ain't Easy Being Breezies", Spike disrupts the Breezies' migration by jumping on a branch and dislodging a leaf.
** In "For Whom The Sweetie Belle Toils", Sweetie dreams of a BadFuture where Rarity [[SanitySlippage loses her career and sanity]] due to Sweetie's prank removing the stitch from Sapphire Shores' headdress.
** The Season 5 finale "The Cutie Remark" has Twilight Sparkle attempting to prevent this due to Starlight Glimmer flipping out and altering history so that the Sonic Rainboom failed and the Mane Six never united. Every attempt by Twilight to stop Starlight results in her succeeding in a slightly different way and resulting in a different BadFuture -- all of them but the last caused by some threat that the protagonists originally stopped. [[spoiler:After seven of these are hit, Starlight has a MyGodWhatHaveIDone moment and pulls a HeelFaceTurn when Twilight reassures her that not all friendships turn out to be disastrous. She ends up becoming a SixthRanger to the Mane Six (Mane Seven?) as a result.]]
* ''WesternAnimation/TheLegendOfTarzan'': Jane plants a little flowering vine because she can't stand how ripe fruit smells. The vine grows and starves out all the food the Elephants need. So the Elephants move into the Gorilla's territory until the vine is gotten rid of. Fifteen minutes later, the Elephants and Gorillas are trying to kill each other.
* In the ''WesternAnimation/RatedAForAwesome'' episode "Thera's Date With Destiny" Noam's new future-predicting invention shows that Thera will be going to prom with [[TheBully Chet]]. They try to change the outcome, but each attempt either has them start dating even sooner or she goes to prom with someone else she doesn't want to go with. That is until the last vision, which doesn't show her date's face, but it's hinted to be Noam. Each vision after the first also shows her with a different hairstyle.
* ''WesternAnimation/UltimateBookOfSpells'': When the WizardingSchool went into a field trip to the past, Gus took a crystal as a souvenir. Unfortunately, without that crystal to power up his wand, Cassy's great-grandfather couldn't defeat [[BigBad Zarlak]], resulting in a BadFuture where Zarlak rules. Fortunately UBOS managed to take the heroes back to the past to set things right.
* The ''WesternAnimation/WhereOnEarthIsCarmenSandiego'' episode "Timing is Everything" had one of Carmen's henchmen, Mason-Dixon, go back in time and tamper with one of Carmen's first heists. After he caused her to fail at evading the police, she went on to become ''his'' discouraged henchwoman.
* Apparently the fate of of all life on Earth in ''WesternAnimation/TheAvengersEarthsMightiestHeroes'' depends entirely on whether or not [[spoiler:Captain America approves of Black Panther performing a HeroicSacrifice to stop the Kree from destroying the sun]].
* In the fifth season premiere of ''WesternAnimation/AdventureTime'', Finn wishes that [[BigBad the Lich]] never existed, creating an AlternateTimeline where the Lich never came to be. Things go downhill from there very rapidly. [[spoiler:And to top it off, the Lich is born anyway, although several years later than he would have been ''and'' in a radically different form.]]
* In the ''WesternAnimation/LiloAndStitchTheSeries'' episode "Melty", Lilo embarrasses herself in front of her crush Keoni and goes back in time to make it so it didn't happen, but her every attempt to stop it from happening makes everything far worse. In the end she fixes everything by going back and recreating the embarrassing moment.
* An episode of ''WesternAnimation/JacobTwoTwo'' had Jacob accidentally break his older brother's Beatles record and use a time machine from his spy neighbor (seriously) to go back and fix it, but Jacob messed up something else that he had to go back and fix, etc. Ultimately, he was able to fix everything except his brother's record from being destroyed, but it turned out his neighbor had a copy anyway.
* ''WesternAnimation/TheLooneyTunesShow'': In "Best Friends Redux", Daffy travels back in time to prevent Bugs from meeting his childhood best friend Rodney Rabbit. In doing so, he creates a present where Bugs never met him and no one knows who he is.



* Parodied in one of the {{Cold Open}}s of ''WesternAnimation/{{Arthur}}''. The Brain builds a time machine at school so that the gang can explore the time of the dinosaurs, and warns his friends to stay within marked boundaries in order to avoid messing up time. Unfortunately, Buster just happens to be eating a box of raisins as they went exploring, and the box accidentally falls from his pocket, off the path, and outside the boundaries. It isn't until everyone returns to the school that they realize that they now have scaly, lizard-like limbs, all thanks to that one box. Mr. Ratburn invites them in to class, also having lizard-like legs, and eats a fly as the intro comes to a close.
* In ''WesternAnimation/AlvinAndTheChipmunks'', Alvin wins a sweepstakes where he's offered one of two prizes: $500 or a mystery prize that could range anywhere from a free lunch to millions of dollars. He's shown two alternate futures. In the first one where he takes the $500, he ended up investing it and continuing his singing career, and as a result, he and Brittany are filthy rich, Simon and Jeanette are successful scientists and Theodore and Eleanore run a booming restaurant business. In the future where he takes the mystery prize, he just gets a free lunch which gives who food poisoning, weakening his vocal chords and forcing him to give up singing, which causes him and everyone else to be poor. Ultimately, it was subverted, because when Alvin calls to claim the $500, they realize he's only a kid and explain to him that he had to be at least 18 to enter the sweepstakes.

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* Parodied WesternAnimation/{{DCAU}}:
** ''WesternAnimation/JusticeLeague'', "A Better World" has an alternate universe where the League is a group of [[WellIntentionedExtremist "well-intentioned" extremists]], set off by the nail being the death of their Flash. [[spoiler:Implications of this episode would face the main continuity for nearly the remainder of the show.]]
** Meta-example with the ''WesternAnimation/BatmanTheAnimatedSeries'' episode "Bane": It's only a well-placed Batarang to Bane's Venom feed that prevents the episode from playing out exactly the way ''ComicBook/{{Knightfall}}'' did.
* ''WesternAnimation/TheFairlyOddParents'':
** Most of Timmy's time traveling adventures
in backfire because he doesn't realize until it's too late that ''he'' was the nail that made things go wrong; for instance, a StableTimeLoop involving Mr. Crocker's obsession with fairies.
** Not to mention the episode where he wishes he was never born. Turns out his gender is a nail as well - his parents had a girl instead, and the life of everyone Timmy knows is better for it.
** There was also the episode "Father Time" where Timmy, after melting his dad's trophy with Heat Vision, goes with Cosmo's crazy idea to go back and time to stop his father from ''winning'' the "stupid trophy" in the first place. When that happens, Timmy's dad gets the last place prize; an all expenses paid mandatory twelve year scholarship to Lil' Tyrant Dictator School. The result... a BadFuture where Mr. Turner rules the Earth from his headquarters in Dimmsdale with an iron fist of [[StepfordSmiler creepy happiness]], treats all of his subjects as his children, and never got to marry Mrs. Turner. Therefore, Timmy Turner (by technicality) no longer exists and loses his godparents (who vanish JUST before the revelation of Dictator School).
* On the fifth season finale of ''WesternAnimation/FamilyGuy'', Peter goes back in time to sow his wild oats and ends up not marrying Lois, who married Quagmire instead. Apparently, their not marrying allowed Al Gore to become President -- and Gore apparently killed Bin Laden, instituted zero-tolerance gun control and universal health care, and fixed the public school system. In addition to all that, Dick Cheney shot Tucker Carlson, Antonin Scalia, and Karl Rove. With one bullet. Brian likes it this way. Whew. Even after they "fix" the time-stream, the present still isn't the same: somehow, [[WesternAnimation/AmericanDad Roger Smith]] ended up in their house.
* Subverted in the ''WesternAnimation/FantasticFourWorldsGreatestHeroes'' 2007 animated series episode "Out of Time". While the Four are on a field trip to prehistoric Earth the Thing swats a mosquito, just as Mr. Fantastic warns them not to change anything. The camera then pulls back to show he's already killed a dinosaur. Reed later assures him that this can't possibly have had the effect of Doctor Doom ruling the world. But when the Torch gives cavemen the secret of fire, he's worshiped as a god in modern New York (although InSpiteOfANail, 15,000 years of Johnny Storm worship hasn't changed anything except the Statue of Liberty).
* ''WesternAnimation/{{Freakazoid}}'' inverts this. The titular hero ends up at Pearl Harbor in December 1941 and stops the Japanese from invading. When he comes back to the present, the world seems to be a better place: Sharon Stone can act, Radio/RushLimbaugh's a "bleeding-heart liberal", [=EuroDisney=] is booming, cold fusion works, and there are no Chevy Chase movies. Just one catch: [[spoiler:[[WesternAnimation/PinkyAndTheBrain the Brain]] is President.]]
* ''WesternAnimation/{{Futurama}}'':
** The entire series would not have happened if A) Fry hadn't run into Bender at the suicide booth, B) They didn't run into Leela at the diner, C) If it wasn't Tuesday when Fry and Bender went to the head museum, D) If Bender hadn't broken a lightbulb on his antenna, changing his programing, and E) If the professor didn't have his previous crew's career chips with him on the ship. This is subverted with [[spoiler: Fry falling into the tube in the beginning because it is later revealed that Nibbler knocked him in to help save the world in the future.]]
** "The Farnsworth Parabox", which features a universe "exactly like ours" except for the fact that the results of all coin tosses (or at least those in the recent past) are reversed. (According to the DVD commentary, it's a probability maths injoke.) This leads to results like Bender being gold-plated, and Fry and Leela being married. [[BizarroUniverse Oh, also the colors are all mixed up, the sky is bright and swirly and the background music is a Theremin.]] How'd we forget that? Other perpendicular universes (parallel universes, like the cowboy universe, never intersect) are visited, including a universe where everyone lack eyes, where their heads are bobble-heads, where everybody is a robot, a Roman Empire-themed universe (complete with Roman numerals calculus) and a hippie universe... however there do seem to be universes without the main characters, such as an octopus universe, a universe filled only with women and a completely frozen universe.
** In "All the President's Heads", the gang travels back in time to UsefulNotes/TheAmericanRevolution to stop Prof. Farnsworth's ancestor David, who betrayed the Revolutionaries by counterfeiting money. After they stop David, Fry burns the counterfeit bills with a lantern he found in a church, which turned out to be
one of the {{Cold Open}}s lamps used to signal the coming of ''WesternAnimation/{{Arthur}}''. The Brain builds the British (one if by land, two if by sea). Because of this, the British win the war and the gang come back to an America that's still under British rule.
** In "The Devil's Hands Are Idle Playthings", Robot Devil sets up a "[[DealWithTheDevil ridiculously circuitous plan]]" that bounces from Bender, Calculon, Leela, and Fry's opera which ends with either him marrying Leela or getting his robot hands back from Fry.
* An episode of ''WesternAnimation/JacobTwoTwo'' had Jacob accidentally break his older brother's Beatles record and use
a time machine at school so that the gang can explore the time of the dinosaurs, and warns his friends to stay within marked boundaries in order to avoid messing up time. Unfortunately, Buster just happens to be eating a box of raisins as they went exploring, and the box accidentally falls from his pocket, off the path, spy neighbor (seriously) to go back and outside the boundaries. It isn't until everyone returns to the school that they realize that they now have scaly, lizard-like limbs, all thanks to that one box. Mr. Ratburn invites them in to class, also having lizard-like legs, and eats a fly as the intro comes to a close.
* In ''WesternAnimation/AlvinAndTheChipmunks'', Alvin wins a sweepstakes where he's offered one of two prizes: $500 or a mystery prize that could range anywhere from a free lunch to millions of dollars. He's shown two alternate futures. In the first one where he takes the $500, he ended
fix it, but Jacob messed up investing it and continuing his singing career, and as a result, he and Brittany are filthy rich, Simon and Jeanette are successful scientists and Theodore and Eleanore run a booming restaurant business. In the future where he takes the mystery prize, he just gets a free lunch which gives who food poisoning, weakening his vocal chords and forcing him to give up singing, which causes him and everyone something else to be poor. Ultimately, it was subverted, because when Alvin calls to claim the $500, they realize he's only a kid and explain to him that he had to be at least 18 go back and fix, etc. Ultimately, he was able to enter fix everything except his brother's record from being destroyed, but it turned out his neighbor had a copy anyway.
* ''WesternAnimation/TheLegendOfTarzan'': Jane plants a little flowering vine because she can't stand how ripe fruit smells. The vine grows and starves out all
the sweepstakes. food the Elephants need. So the Elephants move into the Gorilla's territory until the vine is gotten rid of. Fifteen minutes later, the Elephants and Gorillas are trying to kill each other.
* In the ''WesternAnimation/LiloAndStitchTheSeries'' episode "Melty", Lilo embarrasses herself in front of her crush Keoni and goes back in time to make it so it didn't happen, but her every attempt to stop it from happening makes everything far worse. In the end she fixes everything by going back and recreating the embarrassing moment.
* ''WesternAnimation/TheLooneyTunesShow'': In "Best Friends Redux", Daffy travels back in time to prevent Bugs from meeting his childhood best friend Rodney Rabbit. In doing so, he creates a present where Bugs never met him and no one knows who he is.



* ''WesternAnimation/MuchaLucha'': In "Woulda, Coulda, Hasbeena", [=Señor=] Hasbeena goes back in time to prevent himself from losing a crucial fight and the three mascaritas go after him to protect the timeline. While in the past, Buena Girl collides with the Headmistress' past self. When they return to the present time, [[spoiler:the classroom is full of Buena Girls asking if the story will be on the test.]]
* In the DirectToVideo, ''Our Friend Martin,'' a teenaged African American boy, his white best friend, and two other kids, another white boy and a Latina girl, go back in time to save a teenaged Martin Luther King Jr. after learning that he was assassinated. When they come back [[BadPresent to the present,]] the UsefulNotes/CivilRightsMovement never happened and as a result, the protagonist's "best friend" angrily tells him he doesn't talk to "negroes," Jim Crow laws are still in effect, the Latina girl works as a cleaning girl alongside her mother and doesn't speak English, [[StayInTheKitchen the feminist principal now teaches home-ec.]], and doesn't respond to the principal's sexist insult. When he goes home, he learns that his mother, a self employed business woman, works as maid. Things only go back to normal when King decides to back in time, and accept his role in history.
* In ''WesternAnimation/JusticeLeagueTheFlashpointParadox'', Barry Allen A.K.A. the Flash, wakes up to find his world turned upside down. Thomas Wayne is Batman instead of Bruce, Superman doesn't exist, and the world is on the verge of ending due to a war between Atlantis and Themyscira. At the film's climax, it's revealed one change in the past resulted in this BadPresent; [[spoiler:Barry went back in time to save his mother's life]].

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* ''WesternAnimation/TheLoudHouse'' goes to so far as to name the episode “The Butterfly Effect”, setting viewers up to know what’s in store. When Lincoln loses control of his yo-yo and destroys a project Lisa’s been working on, he decides not to tell her, instead choosing to walk away and say “What’s the worst that could happen?” [[spoiler: Without supervision, the chemicals cause an explosion, blowing up a hole in the wall where Lori and Leni’s closet is. When examining it, Lori finds a signed picture of her boyfriend hidden on Leni’s side, which Leni says he gave to her to hide, but she forgot where it was. Lori gets mad because her boyfriend got her socks for her birthday ( probably because Leni forgot about the real present), and thinks that he is cheating on her with Leni, prompting her to break up with her bf and date Clyde instead. As she slams the door on her way out, the railing in the closet comes loose, and hits Leni on the head, knocking her out. When she wakes up, she is super intelligent, going off to college and inventing cars that run on apple juice. Her smartness makes Lisa feel inferior, and she gives up the pursuit of knowledge and drops out of school to work at a gas station. Without Lisa or any smart sibling to tutor her, Lynn fails her classes and gets kicked off all her sports teams as consequences. Frustrated, she kicks a ball right as Lola is coming down the stairs. The ball hits her in the face and disfigures her, ending her pageant career and driving her to run away from home with Lynn, they become fugitives. Lola’s accident makes Lana overly conscious for her own safety, and she enclosed herself in a plastic bubble. Luna writes a song about all the new chaos going on that goes viral, catching the attention of her favorite rock star, who takes her to go on his tour, which she’s later kicked off of for wrecking a hotel room. Without a roommate to practice her jokes on, Luanne passes time watching the news, and sees all the injustice of the world, inspiring her to give up comedy and become an activist. One of her acts is freeing all of Lana’s exotic pets, including a vampire bat who bites Lucy and turns her into a vampire. Worst of all, Lily, who shares a room with Lisa, is turned into a giant from exposure to the chemicals. Turns out, it was all a fantasy sequence, to which Lincoln replies, “So THAT’S the worst that could happen.”]]
* ''WesternAnimation/MuchaLucha'': In "Woulda, Coulda, Hasbeena", [=Señor=] Señor Hasbeena goes back in time to prevent himself from losing a crucial fight and the three mascaritas go after him to protect the timeline. While in the past, Buena Girl collides with the Headmistress' past self. When they return to the present time, [[spoiler:the classroom is full of Buena Girls asking if the story will be on the test.]]
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** In the episode "The Cutie Mark Chronicles", [[BoisterousBruiser Rainbow Dash's]] first Sonic Rainboom actually indirectly caused all the rest of the Mane Six to get their own cutie marks [[note]]as well as [[UnreliableNarrator helping Pinkie Pie "create Equestria"]][[/note]].
** In "It Ain't Easy Being Breezies", Spike disrupts the Breezies' migration by jumping on a branch and dislodging a leaf.
** In "For Whom The Sweetie Belle Toils", Sweetie dreams of a BadFuture where Rarity [[SanitySlippage loses her career and sanity]] due to Sweetie's prank removing the stitch from Sapphire Shores' headdress.
** The Season 5 finale "The Cutie Remark" has Twilight Sparkle attempting to prevent this due to Starlight Glimmer flipping out and altering history so that the Sonic Rainboom failed and the Mane Six never united. Every attempt by Twilight to stop Starlight results in her succeeding in a slightly different way and resulting in a different BadFuture -- all of them but the last caused by some threat that the protagonists originally stopped. [[spoiler:After seven of these are hit, Starlight has a MyGodWhatHaveIDone moment and pulls a HeelFaceTurn when Twilight reassures her that not all friendships turn out to be disastrous. She ends up becoming a SixthRanger to the Mane Six (Mane Seven?) as a result.]]
* In the DirectToVideo, ''Our Friend Martin,'' ''WesternAnimation/PhineasAndFerb'' epsiode "Phineas and Ferb's Quantum Boogaloo", future Candace travels back in time and helps her younger self bust Phineas and Ferb on the first day of summer. When she returns to her own time, she discovers this act has lead to the tri-state area becoming a teenaged African American boy, dystopia ruled by Doofenshmirtz. She then has to travel back in time again and stop herself from helping her younger self from busting her brothers.
* In the ''WesternAnimation/RatedAForAwesome'' episode "Thera's Date With Destiny" Noam's new future-predicting invention shows that Thera will be going to prom with [[TheBully Chet]]. They try to change the outcome, but each attempt either has them start dating even sooner or she goes to prom with someone else she doesn't want to go with. That is until the last vision, which doesn't show her date's face, but it's hinted to be Noam. Each vision after the first also shows her with a different hairstyle.
* ''WesternAnimation/RobotChicken'':
** A sketch shows what would happen if jerks got a time machine. It ends with one jerk stopping Nazism from ever getting started by humiliating Hitler, thus becoming a Hero with a Time Machine.
** In a parody of ''WesternAnimation/{{Popeye}}'', an angel shows Wimpy what would have happened if he did not exist when Wimpy attempts suicide. Popeye and Brutus are friends, Olive has huge breasts, Goon gains a doctorate, there is no war, and all hamburgers are free. The angel, seeing that he failed, pushes Wimpy off the bridge.
** In a parody of ''Literature/IfYouGiveAMouseACookie'', the mouse tries to wash down the cookie with the boy's mother's breast milk, but accidentally drinks her blood instead, turning him into a vampire, who makes various people
his white best friend, and two followers, on whom the US government declares a nuclear war, which other kids, another white boy countries get involved in, destroying the whole world. [[spoiler:The ending reveals this as a story the mother tells the boy, to explain why she killed her husband for "giving a mouse a cookie".]]
* ''WesternAnimation/TheSimpsons'':
** Inverted by having Homer's guardian angel [[Series/HogansHeroes Werner Klemperer]] show Homer what his life would have been like had he not married Marge. In the alternate timeline, Homer is rich
and happily married to a Latina girl, beautiful woman, while Marge is the President, enjoying both success and popularity. Needless to say, this was not a successful trip for the guardian angel.
** In a "Treehouse of Horror" sketch, the Butterfly Effect is taken to ridiculous extremes as Homer keeps traveling back in time and each time he steps on something, it changes the future in wildly differing ways. He comes to a future where the family is wealthy, his sisters-in-law are dead... but no one has heard of donuts. Homer runs back in time screaming (meanwhile it is raining donuts outside) and just indiscriminately squashes whatever is around him. He comes back to find everything normal... except everyone has forked, lizard-like tongues. He shrugs: "[[CloseEnoughTimeline Close enough]]."
* ''WesternAnimation/StarTrekTheAnimatedSeries'', "Yesteryear", in which Spock and Kirk find themselves in an alternate timeline where a young Spock died and an Andorian is in Spock's place. As it turns out, [[spoiler:Spock's SetRightWhatOnceWentWrong by posing as his older cousin is part of a StableTimeLoop and the alternate timeline was because he took too long with his earlier trip through the Guardian of Forever.]]
* In the ''WesternAnimation/TotallySpies'' episode "Futureshock", the spies' rival, Mandy, breaks a nail during a cheerleading practice (the incident possibly being a DoubleEntendre) and being the vain, shallow type she is, believes this makes her flawed. After David suggests she take up student broadcoasting until her fingernail grows back (since no one will see her hands while she's at a newsdesk), Mandy does so and develops a liking for it. After the spies are accidentally sent into the future (where Mandy now rules Beverly Hills and has renamed it "Mandy Hills"), they discover that Mandy (now with her own TV-network and numerous TV-shows about herself) went from having just one talk show at Beverly Hills High School to running "Mandy Media Enterprises" all in the span of just a month--they also discover that Mandy plans to TakeOverTheWorld by "Mandifying" the entire planet. Fortunately, the heroines (teaming up with their future selves) manage to defeat her, and after being sent back to their original time period, they get some WOOHP-issue nail polish to stash in Mandy's locker, which (after putting it on her nails) makes her nails regrow and she decides to go back to cheerleading.
* ''WesternAnimation/UltimateBookOfSpells'': When the WizardingSchool went into a field trip to the past, Gus took a crystal as a souvenir. Unfortunately, without that crystal to power up his wand, Cassy's great-grandfather couldn't defeat [[BigBad Zarlak]], resulting in a BadFuture where Zarlak rules. Fortunately UBOS managed to take the heroes back to the past to set things right.
* The ''WesternAnimation/WhereOnEarthIsCarmenSandiego'' episode "Timing is Everything" had one of Carmen's henchmen, Mason-Dixon,
go back in time and tamper with one of Carmen's first heists. After he caused her to save a teenaged Martin Luther King Jr. after learning that he was assassinated. When they come back [[BadPresent to fail at evading the present,]] the UsefulNotes/CivilRightsMovement never happened and as a result, the protagonist's "best friend" angrily tells him he doesn't talk to "negroes," Jim Crow laws are still in effect, the Latina girl works as a cleaning girl alongside her mother and doesn't speak English, [[StayInTheKitchen the feminist principal now teaches home-ec.]], and doesn't respond to the principal's sexist insult. When he goes home, he learns that his mother, a self employed business woman, works as maid. Things only go back to normal when King decides to back in time, and accept his role in history.
* In ''WesternAnimation/JusticeLeagueTheFlashpointParadox'', Barry Allen A.K.A. the Flash, wakes up to find his world turned upside down. Thomas Wayne is Batman instead of Bruce, Superman doesn't exist, and the world is on the verge of ending due to a war between Atlantis and Themyscira. At the film's climax, it's revealed one change in the past resulted in this BadPresent; [[spoiler:Barry
police, she went back in time on to save his mother's life]].become ''his'' discouraged henchwoman.


** There was also the episode "Father Time" where Timmy, after melting his dad's trophy with Heat Vision, goes with Cosmo's crazy idea to go back and time to stop his father from ''winning'' the "stupid trophy" in the first place. When that happens, Timmy's dad gets the last place prize; an all expenses paid mandatory twelve year scholarship to Lil' Tyrant Dictator School. The result... a BadFuture where Mr. Turner rules the Earth from his headquarters in Dimmsdale with an iron fist of [[StepfordSmiler creepy happiness]], treats all of his subjects as his children, and never got to marry Mrs. Turner. Therefore, Timmy (by technicality) no longer exists and loses his godparents (who vanish JUST before the revelation of Dictator School).

to:

** There was also the episode "Father Time" where Timmy, after melting his dad's trophy with Heat Vision, goes with Cosmo's crazy idea to go back and time to stop his father from ''winning'' the "stupid trophy" in the first place. When that happens, Timmy's dad gets the last place prize; an all expenses paid mandatory twelve year scholarship to Lil' Tyrant Dictator School. The result... a BadFuture where Mr. Turner rules the Earth from his headquarters in Dimmsdale with an iron fist of [[StepfordSmiler creepy happiness]], treats all of his subjects as his children, and never got to marry Mrs. Turner. Therefore, Timmy Turner (by technicality) no longer exists and loses his godparents (who vanish JUST before the revelation of Dictator School).


** There was also the episode "Father Time" where Timmy, after melting his dad's trophy with Heat Vision, goes with Cosmo's crazy idea to go back and time to stop his father from ''winning'' the "stupid trophy" in the first place. When that happens, Timmy's dad gets the last place prize; an all expenses paid mandatory twelve year scholarship to Lil' Tyrant Dictator School. The result... a BadFuture where Mr. Turner rules the Earth from his headquarters in Dimmsdale with an iron fist of [[StepfordSmiler creepy happiness]], treats all of his subjects as his children, and never got to marry Timmy's mom. Therefore, Timmy (by technicality) no longer exists and loses his godparents (who vanish JUST before the revelation of Dictator School).

to:

** There was also the episode "Father Time" where Timmy, after melting his dad's trophy with Heat Vision, goes with Cosmo's crazy idea to go back and time to stop his father from ''winning'' the "stupid trophy" in the first place. When that happens, Timmy's dad gets the last place prize; an all expenses paid mandatory twelve year scholarship to Lil' Tyrant Dictator School. The result... a BadFuture where Mr. Turner rules the Earth from his headquarters in Dimmsdale with an iron fist of [[StepfordSmiler creepy happiness]], treats all of his subjects as his children, and never got to marry Timmy's mom.Mrs. Turner. Therefore, Timmy (by technicality) no longer exists and loses his godparents (who vanish JUST before the revelation of Dictator School).


** There was also the episode "Father Time" where Timmy, after melting his dad's trophy with Heat Vision, goes with Cosmo's crazy idea to go back and time to stop his father from ''winning'' the "stupid trophy" in the first place. When that happenes, Timmy's dad gets the last place prize; an all expenses paid mandatory twelve year scholarship to Lil' Tyrant Dictator School. The result... a BadFuture where Mr. Turner rules the Earth from his headquarters in Dimmsdale with an iron fist of [[StepfordSmiler creepy happiness]], treats all of his subjects as his children, and never got to marry Timmy's mom. Therefore, Timmy (by technicality) no longer exists and loses his godparents (who vanish JUST before the revelation of Dictator School).

to:

** There was also the episode "Father Time" where Timmy, after melting his dad's trophy with Heat Vision, goes with Cosmo's crazy idea to go back and time to stop his father from ''winning'' the "stupid trophy" in the first place. When that happenes, happens, Timmy's dad gets the last place prize; an all expenses paid mandatory twelve year scholarship to Lil' Tyrant Dictator School. The result... a BadFuture where Mr. Turner rules the Earth from his headquarters in Dimmsdale with an iron fist of [[StepfordSmiler creepy happiness]], treats all of his subjects as his children, and never got to marry Timmy's mom. Therefore, Timmy (by technicality) no longer exists and loses his godparents (who vanish JUST before the revelation of Dictator School).


** There was also the episode "Father Time" where Timmy, after melting his dad's trophy with Heat Vision, goes with Cosmo's crazy idea to go back and time to stop his father from ''winning'' the stupid trophy in the first place. When that happened, Timmy's dad gets the last place prize; an all expense paid scholarship to Dictator School, where he rules Dimmsdale in a dark future with [[StepfordSmiler creepy happiness]] and never got to marry Timmy's mom. So Timmy doesn't exist and lost his godparents (who vanish JUST before the revelation of Dictator School).

to:

** There was also the episode "Father Time" where Timmy, after melting his dad's trophy with Heat Vision, goes with Cosmo's crazy idea to go back and time to stop his father from ''winning'' the stupid trophy "stupid trophy" in the first place. When that happened, happenes, Timmy's dad gets the last place prize; an all expense expenses paid mandatory twelve year scholarship to Lil' Tyrant Dictator School, School. The result... a BadFuture where he Mr. Turner rules the Earth from his headquarters in Dimmsdale in a dark future with an iron fist of [[StepfordSmiler creepy happiness]] happiness]], treats all of his subjects as his children, and never got to marry Timmy's mom. So Therefore, Timmy doesn't exist (by technicality) no longer exists and lost loses his godparents (who vanish JUST before the revelation of Dictator School).


* In ''JusticeLeagueTheFlashpointParadox'', Barry Allen A.K.A. the Flash, wakes up to find his world turned upside down. Thomas Wayne is Batman instead of Bruce, Superman doesn't exist, and the world is on the verge of ending due to a war between Atlantis and Themyscira. At the film's climax, it's revealed one change in the past resulted in this BadPresent; [[spoiler:Barry went back in time to save his mother's life]].

to:

* In ''JusticeLeagueTheFlashpointParadox'', ''WesternAnimation/JusticeLeagueTheFlashpointParadox'', Barry Allen A.K.A. the Flash, wakes up to find his world turned upside down. Thomas Wayne is Batman instead of Bruce, Superman doesn't exist, and the world is on the verge of ending due to a war between Atlantis and Themyscira. At the film's climax, it's revealed one change in the past resulted in this BadPresent; [[spoiler:Barry went back in time to save his mother's life]].


* In the fifth season premiere of ''WesternAnimation/AdventureTime'', Finn wishes that [[BigBad the Lich]] never existed, creating an AlternateTimeline where the Lich never came to be. Things go downhill from there very rapidly. [[spoiler:And to top it off, the Lich is born anyway, although several years later than he would have and in a radically different form.]]

to:

* In the fifth season premiere of ''WesternAnimation/AdventureTime'', Finn wishes that [[BigBad the Lich]] never existed, creating an AlternateTimeline where the Lich never came to be. Things go downhill from there very rapidly. [[spoiler:And to top it off, the Lich is born anyway, although several years later than he would have and been ''and'' in a radically different form.]]


** The Season 5 finale "The Cutie Remark" has Twilight Sparkle attempting to prevent this due to Starlight Glimmer flipping out and altering history so that the Sonic Rainboom failed and the Mane Six never united. Every attempt by Twilight to stop Starlight results in her succeeding in a slightly different way and resulting in a different BadFuture -- all of them but the last caused by some threat that the protagonists originally stopped. [[spoiler:After seven of these are hit, Starlight has a MyGodWhatHaveIDone moment and pulls a HeelFaceTurn when Twilight reassures her that all friendships doesn't turn out to be disastrous. She ends up becoming a SixthRanger to the Mane Six (Mane Seven?) as a result.]]

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** The Season 5 finale "The Cutie Remark" has Twilight Sparkle attempting to prevent this due to Starlight Glimmer flipping out and altering history so that the Sonic Rainboom failed and the Mane Six never united. Every attempt by Twilight to stop Starlight results in her succeeding in a slightly different way and resulting in a different BadFuture -- all of them but the last caused by some threat that the protagonists originally stopped. [[spoiler:After seven of these are hit, Starlight has a MyGodWhatHaveIDone moment and pulls a HeelFaceTurn when Twilight reassures her that not all friendships doesn't turn out to be disastrous. She ends up becoming a SixthRanger to the Mane Six (Mane Seven?) as a result.]]


* “WesternAnimation/TheLoudHouse” goes to so far as to name the episode “The Butterfly Effect”, setting viewers up to know what’s in store. When Lincoln loses control of his yo-yo and destroys a project Lisa’s been working on, he decides not to tell her, instead choosing to walk away and say “What’s the worst that could happen?” Without supervision, the chemicals cause an explosion, blowing up a hole in the wall where Lori and Leni’s closet is. When examining it, Lori finds a signed picture of her boyfriend hidden on Leni’s side, which Leni says he gave to her to hide, but she forgot where it was. Lori gets mad because her boyfriend got her socks for her birthday ( probably because Leni forgot about the real present), and thinks that he is cheating on her with Leni, prompting her to break up with her bf and date Clyde instead. As she slams the door on her way out, the railing in the closet comes loose, and hits Leni on the head, knocking her out. When she wakes up, she is super intelligent, going off to college and inventing cars that run on apple juice. Her smartness makes Lisa feel inferior, and she gives up the pursuit of knowledge and drops out of school to work at a gas station. Without Lisa or any smart sibling to tutor her, Lynn fails her classes and gets kicked off all her sports teams as consequences. Frustrated, she kicks a ball right as Lola is coming down the stairs. The ball hits her in the face and disfigures her, ending her pageant career and driving her to run away from home with Lynn, they become fugitives. Lola’s accident makes Lana overly conscious for her own safety, and she enclosed herself in a plastic bubble. Luna writes a song about all the new chaos going on that goes viral, catching the attention of her favorite rock star, who takes her to go on his tour, which she’s later kicked off of for wrecking a hotel room. Without a roommate to practice her jokes on, Luanne passes time watching the news, and sees all the injustice of the world, inspiring her to give up comedy and become an activist. One of her acts is freeing all of Lana’s exotic pets, including a vampire bat who bites Lucy and turns her into a vampire. Worst of all, Lily, who shares a room with Lisa, is turned into a giant from exposure to the chemicals. Turns out, it was all a fantasy sequence, to which Lincoln replies, “So THAT’S the worst that could happen.”

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* “WesternAnimation/TheLoudHouse” goes to so far as to name the episode “The Butterfly Effect”, setting viewers up to know what’s in store. When Lincoln loses control of his yo-yo and destroys a project Lisa’s been working on, he decides not to tell her, instead choosing to walk away and say “What’s the worst that could happen?” [[spoiler: Without supervision, the chemicals cause an explosion, blowing up a hole in the wall where Lori and Leni’s closet is. When examining it, Lori finds a signed picture of her boyfriend hidden on Leni’s side, which Leni says he gave to her to hide, but she forgot where it was. Lori gets mad because her boyfriend got her socks for her birthday ( probably because Leni forgot about the real present), and thinks that he is cheating on her with Leni, prompting her to break up with her bf and date Clyde instead. As she slams the door on her way out, the railing in the closet comes loose, and hits Leni on the head, knocking her out. When she wakes up, she is super intelligent, going off to college and inventing cars that run on apple juice. Her smartness makes Lisa feel inferior, and she gives up the pursuit of knowledge and drops out of school to work at a gas station. Without Lisa or any smart sibling to tutor her, Lynn fails her classes and gets kicked off all her sports teams as consequences. Frustrated, she kicks a ball right as Lola is coming down the stairs. The ball hits her in the face and disfigures her, ending her pageant career and driving her to run away from home with Lynn, they become fugitives. Lola’s accident makes Lana overly conscious for her own safety, and she enclosed herself in a plastic bubble. Luna writes a song about all the new chaos going on that goes viral, catching the attention of her favorite rock star, who takes her to go on his tour, which she’s later kicked off of for wrecking a hotel room. Without a roommate to practice her jokes on, Luanne passes time watching the news, and sees all the injustice of the world, inspiring her to give up comedy and become an activist. One of her acts is freeing all of Lana’s exotic pets, including a vampire bat who bites Lucy and turns her into a vampire. Worst of all, Lily, who shares a room with Lisa, is turned into a giant from exposure to the chemicals. Turns out, it was all a fantasy sequence, to which Lincoln replies, “So THAT’S the worst that could happen.”]]

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* “WesternAnimation/TheLoudHouse” goes to so far as to name the episode “The Butterfly Effect”, setting viewers up to know what’s in store. When Lincoln loses control of his yo-yo and destroys a project Lisa’s been working on, he decides not to tell her, instead choosing to walk away and say “What’s the worst that could happen?” Without supervision, the chemicals cause an explosion, blowing up a hole in the wall where Lori and Leni’s closet is. When examining it, Lori finds a signed picture of her boyfriend hidden on Leni’s side, which Leni says he gave to her to hide, but she forgot where it was. Lori gets mad because her boyfriend got her socks for her birthday ( probably because Leni forgot about the real present), and thinks that he is cheating on her with Leni, prompting her to break up with her bf and date Clyde instead. As she slams the door on her way out, the railing in the closet comes loose, and hits Leni on the head, knocking her out. When she wakes up, she is super intelligent, going off to college and inventing cars that run on apple juice. Her smartness makes Lisa feel inferior, and she gives up the pursuit of knowledge and drops out of school to work at a gas station. Without Lisa or any smart sibling to tutor her, Lynn fails her classes and gets kicked off all her sports teams as consequences. Frustrated, she kicks a ball right as Lola is coming down the stairs. The ball hits her in the face and disfigures her, ending her pageant career and driving her to run away from home with Lynn, they become fugitives. Lola’s accident makes Lana overly conscious for her own safety, and she enclosed herself in a plastic bubble. Luna writes a song about all the new chaos going on that goes viral, catching the attention of her favorite rock star, who takes her to go on his tour, which she’s later kicked off of for wrecking a hotel room. Without a roommate to practice her jokes on, Luanne passes time watching the news, and sees all the injustice of the world, inspiring her to give up comedy and become an activist. One of her acts is freeing all of Lana’s exotic pets, including a vampire bat who bites Lucy and turns her into a vampire. Worst of all, Lily, who shares a room with Lisa, is turned into a giant from exposure to the chemicals. Turns out, it was all a fantasy sequence, to which Lincoln replies, “So THAT’S the worst that could happen.”


* ''WesternAnimation/Looped'' is about two friends stuck in a GroundhogDayLoop and every episode takes place on the same Monday, but the day keeps going differently depending on their actions.

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* ''WesternAnimation/Looped'' ''WesternAnimation/{{Looped}}'' is about two friends stuck in a GroundhogDayLoop and every episode takes place on the same Monday, but the day keeps going differently depending on their actions.


* ''Looped'' is about two friends stuck in a GroundhogDayLoop and every episode takes place on the same Monday, but the day keeps going differently depending on their actions.

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* ''Looped'' ''WesternAnimation/Looped'' is about two friends stuck in a GroundhogDayLoop and every episode takes place on the same Monday, but the day keeps going differently depending on their actions.


** The entire series would not have happened if A) Fry hadn't run into Bender at the suicide booth, B) They didn't run into Leela at the diner, C) If it wasn't Tuesday when Fry and Bender went to the head museum, D) If Bender hadn't broken a lightbulb on his antenna, changing his programing, and E) If the professor didn't have his previous crew's career chips with him on the ship. This is subverted with [[spoiler: Fry falling into the tube in the beginning because it is later revealed thar Nibbler knocked him in to help save the world in the future.]]

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** The entire series would not have happened if A) Fry hadn't run into Bender at the suicide booth, B) They didn't run into Leela at the diner, C) If it wasn't Tuesday when Fry and Bender went to the head museum, D) If Bender hadn't broken a lightbulb on his antenna, changing his programing, and E) If the professor didn't have his previous crew's career chips with him on the ship. This is subverted with [[spoiler: Fry falling into the tube in the beginning because it is later revealed thar that Nibbler knocked him in to help save the world in the future.]]

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** In ''WesternAnimation/TheUltimateEnemy'', Danny getting caught cheating on a test ends up causing a chain of events that leads to [[BadFuture his friends and family dying in an explosion]] and his ghost half becoming separated from his human half, then [[KnightOfCerebus turning evil and murdering his human half]] before terrorizing Earth and the Ghost Zone for decades.

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