History BeCarefulWhatYouWishFor / FanWorks

* Another Harry Potter fanfic had Harry, unable to finish Voldemort off because he hid one Horcrux too well and unwilling to let him continue killing, put Voldemort in stasis for millions of years: Voldemort awakens at a time when all of humanity has left Earth, and the Sun is glowing so hot that the planet's surface is almost scorched. In the end, Voldemort notes with irony that he got his wishes: he will live forever (or for so long that it will seem so), he will rule a world that is empty of most other life and he will be the most powerful wizard in the world because he is the ''only'' wizard in the world.

* In ''[[https://www.fimfiction.net/story/443419/the-witch-of-canterlot The Witch of Canterlot]]'' this trope is the reason Saddle Arabia went from the richest country in the world to a poor desert: in the older days the land hosted a large number of ''djinn'' who'd grant any wish [[LiteralGenie to the letter]], no matter what kind of wishes they were or who made them, resulting in the land first becoming incredibly rich and then being devastated by horrors conjured by people thinking out loud while a ''djinni'' passed by, children making poorly considered wishes (the example given is a child wishing a mountain of ice cream: not only he'd grow sick in minutes, the ice cream would quickly become inedible and attract vermins while it melts and ruins crops and the land it grows on), and wishes of revenge being made by irresponsible people, eventually resulting in the government hunting the ''djinn'' into extinction and [[spoiler:''very'' carefully administering what little remaining wish power remains]].

* In ''Fanfic/TheRoyalProtector'' both Marco and Brittney get hit by this hard. Marco wished for more fun and excitement in his life and Brittney wished for him to get sucked into a dark abyss in a fit of anger, cue Star casting a SummonEverymanHero spell at that moment and everyone blaming Brittney for Marcos disappearance.

* ''Webcomic/KillLaKillAU'': In Comic 41, we have Ryuuko, in light of Satsuki's illness, and she wishes to be the "[[IllGirl sick one]]" [[SelflessWish instead of her then ill sister]]. Unfortunately, this comes true and the comic ends with her in the hospital as her illness gets worse. In the second part of that arc, Satsuki wishes to be the sick one, too, so Ryuuko won't be alone
* ''Fanfic/TheOutside'' seems to imply this, as Ryuuko wanted little more than to go outside. She does get to but, unfortunately, this costs her the life she had before, as her getting injured it the reason she's removed from Satsuki's care altogether.

* In ''Fanfic/NeonGenesisEvangelionGenocide'', Misato wanted that her ward Asuka had enough free time to recover from her latest physical and mental wounds. Then [[spoiler:her HumongousMecha went berserker, hurt another pilot, and Ritsuko considered to fire her.]]

* ''[[Fanfic/MegsFamilySeries Meg's Family]]'' has the chapter ''Time Stew''. Stewie, after having a dream that Maddie will stop his plans of world domination, goes back in time to prevent Maddie from being born by making it so that Meg and Zack never met. Of course, Stewie realizes just how much he cared about Maddie and tries to get her born again. This goes to hell when [[spoiler:after getting Meg and Zack (Whose married to Nikki in this timeline) together, Zack ends up murdered and Meg kills herself afterwords]]. Brian even says this trope word for word.a

[[AC:WsternAnimation/DannyPhantom]]

[[AC:WsternAnimation:DannyPhantom]]

[[AC: {{WesternAnimation/Beetlejuice}]]

* ''Fanfic/HellsisterTrilogy'': During his wedding, [[Franchise/{{Superman}} Clark Kent]] surreptitiously makes Lois' bouquet land on ComicBook/{{Supergirl}}'s hands; a subtle way to wish her good luck in finding a steady boyfriend. Next time he saw her, Kara had hooked up with Dev-Em, a former pain-in-the-ass bully whom he loathes.

* In ''FanFic/LoveHinaLikeItCouldHaveBeen'', Naru and Makoto successfully drive Keitaro away from the Hinata Inn, meaning they don't have to deal with a male manager. Instead, they have to cope with the fallout, as a coldly furious Haruka promptly declares the girls will have to split all the chores he would have taken over.

* ''[[https://www.fanfiction.net/s/3872674/1/Account-Transfer Account Transfer]]'' has Ryoga wish he had Ranma's problems instead of his own. He gets Ranma's Jusenkyo curse, Akari and Ukyo both get engaged to him, Shampoo starts chasing him after he defeats her in a fight (earning Mousse's enmity in the process), he accidentally learns the [[DangerousForbiddenTechnique Nekoken]], subsequently getting a phobia of cats, has to go to a school where Principal Kuno and Hinako work, and finally gets the same relationship with the Kuno siblings Ranma had. To add insult to injury, Akane gives Akari her HyperspaceMallet, and Happosai vows to give Ryoga's female form all his attentions.
* In ''FanFic/Gensokyo20XX'', this happens to Chen when she tells Yume Ni that she wishes for her to suffer and she does,... through long-term illness, from which she dies. Chen notes she wishes that weren't the last thing she said to her.
* ''Webcomic/KillLaKillAU'': In Comic 41, we have Ryuuko, in light of Satsuki's illness, and she wishes to be the "[[IllGirl sick one]]" [[SelflessWish instead of her then ill sister]]. Unfortunately, this comes true and the comic ends with her in the hospital as her illness gets worse.
* In ''[[http://archiveofourown.org/works/1215337/chapters/2793427 Winter Is Coming Along With Ideas]]'', Rhaegar gets his wished second daughter for his "three-heads of the dragon" prophecy from his love, Lyanna Stark. Unfortunately while Rhaegar survives to become king and put down the rebellion, Lyanna dies in childbirth and his wife and son are killed. He spends the story repenting for his actions and taking care of his daughters, Rhaenys and [[GenderFlip Joanna]].
** Cersei Lannister gets to marry the man she always wanted, unfortunately Rhaegar hates her because her father killed his wife and child and only married her because she was only one close to his age. She also has no [[BrotherSisterIncest Jaime]] to take comfort in because Jaime was banished to the Wall.

* ''[[Fanfic/MegsFamilySeries Meg's Family]]'' has the chapter ''Time Stew''. Stewie, after having a dream that Maddie will stop his plans of world domination, goes back in time to prevent Maddie from being born by making it so that Meg and Zack never met. Of course, Stewie realizes just how much he cared about Maddie and tries to get her born again. This goes to hell when [[spoiler:after getting Meg and Zack (Whose married to Nikki in this timeline) together, Zack ends up murdered and Meg kills herself afterwords]]. Brian even says this trope word for word.
* In ''[[https://www.fanfiction.net/s/4926498/1/A-Jealous-Wish A Jealous Wish]]'' [[Franchise/{{Dragonball}} Goku]], after seeing Oopa's joy at having his father back, wishes to Shenron to have his own father back. An AffablyEvil Saiyan who could destroy all life on Earth in a matter of hours if given reason (assuming he doesn't just [[EarthShatteringKaboom blow up the planet]]) and [[FishOutOfWater has no idea of what's going on beyond the fact the son that in his visions would defeat Frieza has wished him back to life and isn't anywhere near strong enough to take on the monster that will come to try and murder him]]. Surprisingly, [[PoorCommunicationKills the only victim so far is a doctor whose mutterings gave Bardock the impression he was too incompetent to be allowed to live]].
* In the ''Fanfic/FacingTheFutureSeries'', much like in the [[WesternAnimation/DannyPhantom cartoon]], Desiree works with this trope [[spoiler:until she finds love with Sidney Poindexter]].

* In the story ''FanFic/{{Cinderjuice}}'', in order to go with Lydia to her prom, WesternAnimation/{{Beetlejuice}} allows himself to be turned into an age-appropriate powerless mortal. [[spoiler:Unfortunately, turning back is the real problem...]]
* ''FanFic/WithThisRing'': In "Contingency" OL complains endlessly over the sloppiness of Martian Manhunter's training scenario, he complains that it's uncreative and unrealistic because the Justice League in it act very uncharacteristically. He definitely gets his wish for realism.

* In the ''WesternAnimation/InvaderZim'' fanfic ''Gaz Dreams of Genie'', Gaz gets hit with this after accidentally freeing the genie Azie from her lamp and being granted ThreeWishes in exchange. She wastes her first wish with a FreudianSlip (expressing her annoyance with Dib by saying she sometimes wishes he'd never been born), leading to a VillainWorld where Zim rules and she's a slave; she then has to use her second wish to hit the ResetButton. Left with only one wish, and specifically being told she can't wish for more, Gaz spends time contemplating every wish she can think of, and realizes that every single one could theoretically backfire on her. [[spoiler: She tries to employ some LoopholeAbuse by wishing for the power to grant her own wishes (thus allowing her to tailor things her way), but this just leads to [[BecomingTheGenie her and Azie switching lives, leaving Gaz trapped in the lamp]].]]

* Averted and played straight on separate occasions in ''Irresistible'' when [[Manga/RosarioToVampire Yukari Sendo]] manages to purchase a Monkey's Paw with two wishes left on it. Yukari, having researched the magical artifact and knowing it's potential for backfiring, wished to be "Tsukune's dream woman" and is turned into an older version of herself who knows exactly how to become Tsukune's woman. [[LovableSexManiac Gin]], knowing nothing about the artifact except that it can grant wishes, wishes for there to be more girls at Yokai Academy. Since the Monkey's Paw lacks the power to create life, it simply [[GenderBender turns all the boys at the academy into girls]] (barring Tsukune whose heritage makes him immune).

* In ''[[https://www.fanfiction.net/s/4926498/1/A-Jealous-Wish A Jealous Wish]]'' [[Manga/{{Dragonball}} Goku]], after seeing Oopa's joy at having his father back, wishes to Shenron to have his own father back. An AffablyEvil Saiyan who could destroy all life on Earth in a matter of hours if given reason (assuming he doesn't just [[EarthShatteringKaboom blow up the planet]]) and [[FishOutOfWater has no idea of what's going on beyond the fact the son that in his visions would defeat Frieza has wished him back to life and isn't anywhere near strong enough to take on the monster that will come to try and murder him]]. Surprisingly, [[PoorCommunicationKills the only victim so far is a doctor whose mutterings gave Bardock the impression he was too incompetent to be allowed to live]].

* ''Fanfic/NeitherABirdNorAPlaneItsDeku'': Overlapping with GoneHorriblyRight. Bakugou constantly berates Izuku on his hypocrisy due to his refusal to be a hero, and wishes he'd apply for the UA so they can properly settle their score. A series of events eventually get Izuku to retake his dreams, and when he does, Bakugou demands that he trains for the entry exam because there's no way he's getting in after a whole decade of inaction. Izuku ends up taking that advice [[spoiler: to the point he walks away with the highest entry score ''ever'' in the history of the UA, surpassing even All Might himself. Worse, he quickly becomes TheParagon and inspires other students to help each other, knocking Bakugou down to the bottom of the Top 10 ranking. As a result, on the first day Izuku quickly becomes the BigManOnCampus while everybody takes a dislike to Bakugou and [[NeverLiveItDown some even make fun of him for his score, as well as the Sludge Villain incident]].]]
** Deku himself (and the ''premise itself'') are an example of this. Izuku wanted nothing more than an amazing Quirk so he could be like All Might and was devastated when he was declared Quirkless. He got his wish when his Kryptonian SuperStrength and NighInvulnerability manifested not long after he got home. Unfortunately, he's a four-year-old with [[DoesNotKnowHisOwnStrength powers he doesn't understand.]] So when he gets into a fight with Bakugou, he accidentally throws Bakugou into a building across the street, which nearly kills Bakugou and leaves him grievously scarred for life. Then Izuku slowly starts developing more powers than he knows how to deal with, including [[SuperSenses Super-Hearing]] that's so intense that he passes out after listening to ''every'' bad thing happening around the world at once. ''Then'' he learns that the reason why he has his powers is [[IAmWho because he's an alien.]] His Earth happens to be plagued with [[FantasticRacism anti-alien hysteria]]. He certainly hit the SuperpowerLottery, but it came with a [[AdaptationalAngstUpgrade boatload of angst he wasn't prepared for.]]

* In ''[[https://www.fanfiction.net/s/10917821/26/The-questionable-burdens-of-leadership-of-a-troll-Emperor The (Questionable) Burdens of Leadership of a Troll Emperor]]'', whenever someone in their empire expresses desire to not be ruled by Naruto and Xanna, the two offer them the chance. They can take all their personal belongings and be sent to a planet the two don't control. Most back down when they realize not having their rule also means not having any protection from the [[Franchise/StargateVerse Goa'uld]]. At least one group who took them up on the offer later were attacked by the Goa'uld.

* In ''Fanfic/NeitherABirdNorAPlaneItsDeku'', Izuku wanted nothing more than an amazing Quirk so he could be like All Might and was devastated when he was declared Quirkless. He got his wish when his Kryptonian SuperStrength and NighInvulnerability manifested not long after he got home. Unfortunately, he's a four-year-old with [[DoesNotKnowHisOwnStrength powers he doesn't understand.]] So when he gets into a fight with Katsuki Bakugou, he accidentally throws Katsuki into a building across the street, which nearly kills Katsuki and leaves him grievously scarred for life. Then Izuku slowly starts developing more powers than he knows how to deal with, including [[SuperSenses Super-Hearing]] that's so intense that he passes out after listening to ''every'' bad thing happening around the world at once. ''Then'' he learns that the reason why he has his powers is [[IAmWho because he's an alien.]] His Earth happens to be plagued with [[FantasticRacism anti-alien hysteria]]. He certainly hit the SuperpowerLottery, but it came with a [[AdaptationalAngstUpgrade boatload of angst he wasn't prepared for.]]
** More humorously, Bakugou demands Izuku train for the exam because there's no way in hell someone who hasn't done anything to prepare for ten years would get in. Izuku ends up taking that advice [[spoiler:and [[GoneHorriblyRight walks away with the highest score in the history of the exam.]]]]

* Another Harry Potter fanfic had Harry, unable to finish Voldemort off because he hid one Horcrux too well and unwilling to let him continue killing, manages to put Voldemort in a stasis that lasts for millions of years: Voldemort awakens at a time when all of humanity has left Earth, and the Sun is glowing so hot that the planet's surface is almost scorched. In the end, Voldemort notes with irony that he got his wishes: he will live forever (or for so long that it will seem so), he will rule a world that is empty of most other life and he will be the most powerful wizard in the world because he is the ''only'' wizard in the world.

** Gohan points out this trope in his nerdish way after he and Krillin realize the recently-revived Picollo was brought back to Namek... on the other side of the planet from where they are standing.

* In ''[[https://www.fanfiction.net/s/10917821/26/The-questionable-burdens-of-leadership-of-a-troll-Emperor The (Questionable) Burdens of Leadership of a Troll Emperor]]'', whenever someone in their empire expresses desire to not be ruled by Naruto and Xanna, the two offer them the chance. They can take all their personal belongings and be sent to a planet the two don't control. Most back down when they realize not having their rule also means not having any protection from the [[Franchise/StargateVerse Goa'uld]]. At least one group who took them up on the offer later were attacked by the Goa'uld.

* In ''Fanfic/TheRoyalProtector'' both Marco and Brittney get hit by this hard. Marco wished for more fun and excitement in his life and Brittney wished for him to get sucked into a dark abbys in a fit of anger, cue Star casting a SummonEverymanHero spell at that moment and everyone blaming Brittney for Marcos disappearance.
* In ''Fanfic/RivalsSeries'' Viktor wished to have Yuuri's attention and to have some sort of relationship with him. Viktor gets what he wants when Yuuri chooses to sleep with him, but is very hurt when Yuuri admits to hating him and seems to only want sex from him.
* In ''Fanfic/NeitherABirdNorAPlaneItsDeku'', Izuku wanted nothing more than an amazing Quirk so he could be like All Might and was devastated when he was declared Quirkless. He got his wish when his Kryptonian SuperStrength and NighInvulnerability manifested not long after he got home. Unfortunately, he's a four-year-old with [[DoesNotKnowHisOwnStrength powers he doesn't understand.]] So when he gets into a fight with Katsuki Bakugou, he accidentally throws Katsuki into a building across the street, which nearly kills Katsuki and leaves him grievously scarred for life. Then Izuku slowly starts developing more powers than he knows how to deal with, including [[SuperSenses Super-Hearing]] that's so intense that he passes out after listening to ''every'' bad thing happening around the world at once. ''Then'' he learns that the reason why he has his powers is [[IAmWho because he's an alien.]] His Earth happens to be plagued with [[FantasticRacism anti-alien hysteria]]. He certainly hit the SuperpowerLottery, but it came with a [[AdaptationalAngstUpgrade boatload of angst he wasn't prepared for.]]
** More humorously, Bakugou demands Izuku train for the exam because there's no way in hell someone who hasn't done anything to prepare for ten years would get in. Izuku ends up taking that advice [[spoiler:and [[GoneHorriblyRight walks away with the highest score in the history of the exam.]]]]

* The whole premise ''FanFic/WishCarefully'' boils down to this. Harry decides to let the Death Eaters get what they want (no Muggleborns, no contact with the Muggles, full control over Magical England, all of their enemies out of the way), but instead of being able to revelling in what they have done, Lucius Malfoy eventually realizes that their wishes have actually condemned them. He actually mentions the trope, and calls it trite.

* ''Fanfic/CyclesUponCycles'': After Joker's boast that he could make the ''Normandy'' dance, Shepard tells him to be careful about saying such things as he just may need to do that someday.

* Every chapter of ''Fanfic/GuardiansWizardsAndKungFuFighters'' closes with a narrative quote from a character, usually reflecting some theme from that chapter. In the case of Chapter 20, which is the one where Cedric finally tells Elyon the truth of her identity and takes her to Meridian, the quote is Elyon reflecting on how she used to dream of someone coming to tell her that she's a really a long lost princess, as [[IJustWantToBeSpecial that would mean she's special]]... and how the worst thing that ever happened to her was that dream coming true.

** More humorously, Bakugou demands Izuku train for the exam because there's no way in hell someone who hasn't done anything to prepare for ten years would get in. Izuku ends up taking that advice [[spoiler:and [[GoneHorriblyRight walks away with the highest score in the history of the exam.]]]]
* The ''Fanfic/HalloweenUnspectacular'' anthology series has a few examples:
** In "Wolf", from the fourth edition, [[spoiler: [[WesternAnimation/TheFairlyOddparents Timmy]] accidentally comments on how cool it would be to be a werewolf where his fairies can hear, turning him into one.]]
** In "Timmy Turner's House of Terror", from the seventh edition, Timmy wishes for the ghost of a famous person he can interview for a history project. But because he wasn't specific about who he wanted, he got stuck with Lizzie Borden.
** In "Come and See" from the eighth edition, [[{{Satan}} the Devil]] tempts [[WesternAnimation/InvaderZim Gaz]] with a pocket watch that grants seven wishes, with just two catches. First, every wish cast unlocks one of the seals of the Apocalypse, but with the caveat that Gaz herself won't be directly affected, [[ItsAllAboutMe which she's fine with]]. Secondly, which she's not aware of until it's too late, is that [[spoiler: upon all seven wishes being granted, [[YourSoulIsMine the Devil claims Gaz's soul]]]].

* Played for pure NightmareFuel in ''Fanfic/TheConversionBureauTheOtherSideOfTheSpectrum'' side story ''The Last Train From Oblivion'', where Rio Deneter, a member of the PER, wanted nothing more than to be rid of her DarkAndTroubledPast and she was convinced ponification would solve all of her problems and take the pain away. Rio does get her wish to become a pony granted, [[ForegoneConclusion but given the nature]] of [[GettingSmiliesPaintedOnYourSoul how the conversion process goes]], she quickly regrets her decision but it's already too late for her. What happens next is a MindRape so through that even when Rio tries [[FightingFromTheInside to fight it]], she just loses more and more of herself until she's nothing but a hollow mockery of a pony with no free will or sentience.

* An episode of ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' has Twilight cast a spell on the parasprites, little creatures who are eating all of the food in Ponyville, to stop them from eating the food...which then leads to the creatures eating inanimate objects such as buildings. In one fanfic, Twilight thinks the spell through and casts a spell to stop the parasprites eating food and inanimate objects. Unfortunately, this leads to the parasprites now developing an apettite for the ponies!

[[Franchise/{{Transformers}}]]

-->'''Garlic Jr.''': Dragon! Make me immortal!\\

* ''Fanfic/ACrownOfStars'':
** When Shinji says he can not forgive his father and he can go to Hell, [[PhysicalGod Daniel]] warns him about being careful about what he wishes for, since he ''can'' make it happen:
--->''"Be careful what you wish for around here, Shinji. If that’s what you want, I can make it happen. I maintain and operate my own Hell, for those truly unworthy or unwilling to seek penance and redemption. And I know of even worse places than that."''
** [[spoiler:Kensuke]] wished he had a girlfriend, right like his friends. Then he met one girl was interested in him. Then another girl came along. Then both girls argued. Then they agreed to share him. And he has absolutely no idea of how handling the situation.
* In "[[https://www.fanfiction.net/s/1628189/1/A-Simple-Wish A Simple Wish]]," Chi-Chi carelessly wishes herself out of existence. After seeing how the world has drastically changed without her, she comes to regret the wish.
* ''Fanfic/AdviceAndTrust'': Asuka wanted to show everybody that she was the best pilot, and she wished that Shinji got her blatant hints. At last Shinji got her hints and because she became more psychologically stable -thanks Shinji- she became the Number One, and she and Shinji defeated an enemy together... but because they did not win as [[spoiler:Gendo]] wanted, he [[spoiler:fired them, rendering her accomplishments irrelevant.]]
* In ''Manga/OnePiece'' ''FanFic/ThisBites'', Vice Admiral Jonathan wonders why he thought it was a good idea to let the Straw Hats stress test Navarone.
** Fleet Admiral Sengoku wishes for the Strawhats to engage in [[RapePillageandBurn 'traditional piracy']] over the SBS and even plans on saying prayers for those who'll end up losing their homes. Then he recognizes the voices/names on the broadcast and realizes exactly which island they're destroying-- The Judicial Island, Enies Lobby, which is one of the Marines' three greatest strongholds. It's also [[LampshadeHanging lampshaded by Cross]] during the broadcast almost immediately afterwards.
---> Cross: We're going to take a leaf out of the pages of the big black book of piracy! Only… It's not the edition you were hoping for. We're tearing this straight out of the Four Emperors' personal playbook: you touch one of ours? We fuck you up.
** Jabra taunts Luffy in hopes of getting the best possible fight. Unfortunately for him, he did so by not only pressing Luffy's BerserkButton, but slamming it with a sledgehammer. NoHoldsBarredBeatdown ensues.

* ''Fanfic/ChildOfTheStorm'': In the sequel, ''Ghosts of the Past'', Harry gets hit with this ''hard'' when he darkly remarks that he ''hopes'' the then unknown telepath who intervened to keep him at Privet Drive to study him comes around and has a go, doubtless planning to wreak horrors on his person. Then he does. Cue the ''Forever Red'' arc, in which Harry is kidnapped, tortured, [[spoiler: his BlankSlate body is [[ReforgedIntoAMinion reprogrammed into the Red Son, the Winter Soldier's heir apparent]]]], hundreds of deaths, countless cases of MindRape to varying degrees, the geopolitical map of the mortal and spirit worlds being turned upside down, and worst of all, [[spoiler: the rise of the Dark Phoenix, an event which leads to more than a few mortals and gods concluding that Harry is an ApocalypseMaiden and too dangerous to live, while Harry is a slowly recovering traumatised wreck from the memories of 6 months of black ops horror.]] All in all, it's fair to say that that particular wish backfired.
* ''Fanfic/HellsisterTrilogy'': During his wedding, [[Franchise/{{Superman}} Clark Kent]] surreptitiously makes Lois' bouquet land on ComicBook/{{Supergirl}}'s hands; a subtle way to wish her good luck in finding a steady boyfriend. Next time he saw her, Kara had hooked up with Dev-Em, a former pain-in-the-ass bully whom he loathes.

* The ''Franchise/MyLittlePony'' fanfiction ''[[https://docs.google.com/document/d/11ajdmb55raU6Ik7pAD2GWtauRc_1-wQ_72qYKISm5kk/edit?pli=1 The Curse of Beauty]]'' involves a story within a story about six pony princesses, each named for a fairy tale heroine, who each recklessly used a spell from a magic tome called "The Excess Magic of Wishes", with disastrous and ironic results: Princess Snow White wishes she weren't so tall, and shrinks to a tiny size; Princess Goldilocks wishes to be more "sensitive", and suddenly everything feels too hard or too soft, too cold or too hot, etc.; Princess Rapunzel wishes for a longer mane, and ends up with enough hair to swamp a tower; and so on. Princess Cinderella "merely" gets trapped in a giant pumpkin after losing her concentration while casting a powerful spell.

* In [[https://www.fanfiction.net/s/7799152/1/More-Than-No-Good More Than No Good,]] instead of Tsuna being the heir of the mafia, his twin OC brother is. When Gokudera challenges the brother and ends up being defeated, the brother rejects him and refuses to make him his right hand man. In an effort to make the brother reconsider and show how effective the bomber could be, Reborn has Gokudera guard Tsuna. Obviously Gokudera is not happy about this, and spends most of the time with Tsuna calling him names and wishing he could be his brother's right hand man. In Chapter 12, he gets his wish, only to realize it wasn't as good as he thought it would be. the brother is a petulant, cowardly asshole, who treats everyone around him (''especially'' Gokudera) like shit. Instead of protecting people, or doing anything remotely worthwhile, his new boss uses his followers to belittle and make fun of others. Worse, his boss doesn't even bother treating him like a person, referring to him as a dog more than once. Gokudera realizes too late that he left Tsuna, a person who honestly cared for him and treated him like a friend, for someone who treats him no better than a pet.
* ''Fanfic/ThousandShinji'': Keel and the rest of [[AncientConspiracy Seele]] sought [[AssimilationPlot reaching Instrumentality]] to create a new god and become one with it. When [[EndOfTheWorldAsWeKnowIt Third Impact]] happened, it turned [[spoiler:Shinji, Asuka, Rei and Misato]] -the four persons in the whole world who had suffered the most at the Seele's hands- into gods. And they were ''pissed off''. Cue the Seele members receiving [[FateWorseThanDeath horrible]], [[AndIMustScream horrible]] punishments.
-->"You and the other members of SEELE wanted to shed your bodies and become one with a new god… well, no one ever said that God would be nice or particularly like you and your cronies for your involvement in its birth. I hope you prepared for the eventuality of an eternity being horrifically tortured by your worst nightmares."
* ''[[http://www.fanfiction.net/s/3036180/1/When_All_Your_Dreams_Come_True When All Your Dreams Come True]]'', a [[FridgeHorror horrifyingly]] [[ForWantOfANail plausible]] ''WesternAnimation/AvatarTheLastAirbender'' fanfiction, in which Zuko’s dream of catching the Avatar and being reinstated as his father’s heir comes true…and promptly turns into a scene so nightmarish that he eventually loses himself in increasingly desperate daydreams trying to wish the new reality away.
* ''Fanfic/AFutureOfFriendshipAHistoryOfHate'': Episode 5 is built on this trope -- Scootaloo, tired of the downsides of being a kid, accepts Miserain's aid in becoming an adult... only to figure out pretty fast that she has ''no idea'' how to be one, getting her into all kinds of trouble, eventually leaving her [[HeroicBSOD completely depressed]]. [[spoiler: Which is [[ManipulativeBastard what Miserain wanted]], as Scootaloo's despair fed the woebeghoul sealed in the [[ArtifactOfDoom Tear of Covet]].]] Once everything is over and done with, Scootaloo learns the episode's {{Aesop}} about waiting to grow up.
* The ''Fanfic/PonyPOVSeries'' has this as the origin story of [[GeneralRipper General-Admiral Makarov]]. The Hooviet Empire was struggling to stay afloat after the Dragon-Hooviet War (which ended with the Dragon's leader [[PhysicalGod Queen]] [[{{Kaiju}} Tiamat]] {{Curbstomp|Battle}}ing their entire military and leaving half the empire blazing ruin) and sought to create the UltimateLifeform to enable them to lead them back to greatness. The resulting SuperSoldier experiment created Makarov. The good news? He's doing exactly what they wanted him to do. The bad news? He's playing his leaders for pawns and has his own goals of world domination. [[spoiler:Made more literal by the fact he's actually a [[HumanoidAbomination Equineoid Abomination]] called the Shadow of Chernobull created by Pandora and [[SealedEvilInACan imprisoned in her box.]] A Hooviet experiment with an imagination engine ended up releasing him from his prison, after which he fed off their desires and wishes to become Makarov, in the process [[SpacetimeEater eating the existences]] of countless deer and threatening the entire world.]]
** Chrysalis desires to [[spoiler:complete herself and become an Alicorn (due to being the original Cadenza's Shadow of Existence)]], she eventually succeeds, but [[spoiler:the Elements of Harmony, which did the completing also gave [[TheSociopath her]] [[VillainousBSOD a heart to truly complete her]], which more or less drives her insane.]]
* The Blog/ReadingRainbowverse has Bonbon being a bit annoyed that Lyra isn't taking their relationship seriously... and then Lyra finds out how Bonbon feels and breaks up with her, thinking that she can't return the affections.
* {{Franchise/Transformers}} Mosaic: [[http://www.deviantart.com/art/The-Final-Lesson-136182058 The Final Lesson]] a continuation from the Marvel story Aspects of evil. The Autobot student wanted to know what true evil was, and sought out Unicron. He demands the Fallen to take him to Unicron, and the Fallen does so, teleporting him to a seemingly endless glassy wasteland. The Student is trapped there for months, until he finally realizes his mistake.

* The whole premise of the ''Franchise/HarryPotter'' fanfic ''FanFic/WishCarefully'' boils down to this. Harry decides to let the Death Eaters get what they want (no Muggleborns, no contact with the Muggles, full control over Magical England, all of their enemies out of the way), but instead of being able to reveling in what they have done, Lucius Malfoy eventually realizes that their wishes have actually condemned them. He actually mentions the trope, and calls it trite.

* In ''FanFic/FistOfTheMoon'' [[Anime/SailorMoon Rei Hino]] is very bossy and tends to snipe at Usagi's leadership skills. Then they have to split the team, and Usagi leaves Rei in charge. The fiery girl is panicking about potential attacks and catastrophes less than an hour after Usagi leaves, because she can't bear the thought of disappointing her leader...it's lampshaded by another character that while Rei likes to be in charge and opinionated, the responsibility of leading is too much for her.

* Played for pure NightmareFuel in ''Fanfic/TheConversionBureauTheOtherSideOfTheSpectrum'' side story ''The Last Train From Oblivion'', where Rio Deneter, a member of the PER, wanted nothing more than to be rid of her DarkAndTroubledPast and she was convinced ponification would solve all of her problems and take the pain away. Rio does get her wish to become a pony granted, [[ForegoneConclusion but given the nature]] of [[GettingSmiliesPaintedOnYourSoul how the conversion process goes]], she quickly regrets her decision but it's already too late for her. What happens next is a MindRape so through that even when Rio tries [[FightingFromTheInside to fight it]], she just loses more and more of herself until she's nothing but a hollow mockery of a pony with no free will or sentience.
* [[http://grievousfan.deviantart.com/art/No-Maturity-Here-369566736 "No Maturity Here"]], a short ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' comic, shows Fluttershy getting upset by Discord's pranks and demanding of him, "Act your age!" As it happens, saying this to a RealityWarper that is millenia old isn't a wise thing: Discord takes an undead form as starts terrorizing Ponyville.

* In ''[[http://archiveofourown.org/works/1215337/chapters/2793427 Winter Is Coming Along With Ideas,]]'' Rhaegar gets his wished second daughter for his "three-heads of the dragon" prophecy from his love, Lyanna Stark. Unfortunately while Rhaegar survives to become king and put down the rebellion, Lyanna dies in childbirth and his wife and son are killed. He spends the story repenting for his actions and taking care of his daughters, Rhaenys and [[GenderFlip Joanna]].

* ''Fanfic/ChildrenOfAnElderGod'': Shinji wishes to be a god during a dream, thinking it was just a silly dream. Later on, he gets godly power, but he doesn't like it because it corrupts him and gradually turns him into a HumanoidAbomination.
* In ''Fanfic/NeonGenesisEvangelionGenocide'', Misato wanted that her ward Asuka had enough free time to recover from her latest physical and mental wounds. Then [[spoiler:her HumongousMecha went berserker, hurt another pilot, and Ritsuko considered to fire her.]]
-->'''Ritsuko''': However she sees it is not really relevant. I do find it ironic that you were so concerned for her having some time off and now it bothers you that after next week she won't be required to pilot again. In essence, you have gotten just what you set out to get.\\
'''Misato''': Be careful what you wish for, right?

* In ''Fanfic/MiraculousLadybugVsTheForcesOfEvil'', Marianette and Adrian wished they could have something new and exciting in their "routine" lives. Well they got it when Star Butterfly and her enemies came to town, and all the consequences that spring from this lead to some dark places for the two.

* ''Fanfic/ConstantsAndVariables'': When she realizes that Elizabeth is much more complex and mysterious than she seems, Narcissa invites her to tea to talk politics. When Elizabeth finds out that she drugged her with [[TruthSerums veritaserum]], she decides to tell her the ''whole'' truth, sending them into an alternate world where Voldemort wins. Narcissa seeing the calamity her family’s loyalties will bring certainly puts things into perspective for her.

* In ''Fanfic/TheBoyBehindTheMask'', Snotlout wanted to be chief and the people of Berk wanted an heir that exemplified good old viking machismo. Unfortunately, Snotlout had no idea how boring and hard it would be to be the next chief and the people of Berk don't like the fact that their future chief is a self-righteous idiot, the current Chief and Elders having little to no faith in him.

* ''Fanfic/ProdigalSon'': When the parents of the village try to retract their children from training because Astrid sided with Hiccup (then under the name Prometheus), viewing her as a traitor, Astrid makes a point by having the incompetent and narcissistic Snotlout to take over for her. What follows is Snotlout trying to bully the students into a total offense attack on a monstrous nightmare all the while the terrified parents try and salvage the situation, Astrid's training advice being the only thing keeping them alive.

** In "Come and See" from the eighth edition, [[{{Satan}} the Devil]] tempts [[WesternAnimation/InvaderZim Gaz]] with a pocket watch that grants seven wishes, with just two catches. First, every wish cast unlocks one of the seals of the Apocalypse, but with the caveat that Gaz herself won't be directly affected, [[ItsAllAboutMe which she's fine with]]. Secondly, which she's not aware of until it's too late, is that [[spoiler: upon all seven wishes being granted, [[YourSoulIsMine the Devil claims Gaz's soul]]]].
* An episode of ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' has Twilight cast a spell on the parasprites, little creatures who are eating all of the food in Ponyville, to stop them from eating the food...which then leads to the creatures eating inanimate objects such as buildings. In one fanfic, Twilight thinks the spell through and casts a spell to stop the parasprites eating food and inanimate objects. Unfortunately, this leads to the parasprites now developing an apettite for the ponies!
** In the same fanfic, when Twilight stops to think about the spell, she remembers that she cast the spell on a roommate of hers (back in Canterlot) to stop her from eating desserts to assist with a diet. While the friend did stop eating desserts, she then started eating lots of spinach instead, which led to her passing lots of gas.