* Robynne AKA Hottie II in her Super Hottie Goddess transformation knocked out Cthulhu himself with one punch, twice (actually two from different universes) in [[http://fanfiction.wikia.com/wiki/Hottie_3:_The_Best_Fan_Fic_in_the_World Hottie 3: The Best Fan Fic in the World]].
* In ''FanFic/AeonNatumEngel'', [[EldritchAbomination Dagon]] is [[MindRape Mind Raped]] by [[spoiler:Fettel]]. Let that sink in for a bit! That he's also killed seconds later is just a bonus.
* In ''Fanfic/NobodyDies'', [[spoiler: Terrifying!Rei]] doesn't just punch out Ramiel. She '''[[CrowningMomentOfAwesome FALCON PUNCHES]]''' her.
-->'''OH.'''
-->'''[[OhCrap OH.]]'''
-->'''[[PrecisionFStrike SHIT.]]'''
* [[Anime/SailorMoon Ami]] from ''FanFic/DungeonKeeperAmi'' has, up to this point, beaten [[BigRedDevil a Horned Reaper]], what is possibly [[MightyGlacier the oldest dragon in the world]] and [[GameBreaker the Avatar]], all in single combat. This might be what helps her reputation for DefeatingTheUndefeatable surpass her reputation for being [[AccidentalPervert the biggest]], [[NotWhatItLooksLike most depraved]] [[MaliciousSlander rapist]] [[NeverLiveItDown ever]].
** To be fair, Did you just RAPE Cthulhu is also an accomplishment. In the last Episode the [[TheyWouldCutYouUp Unraveller]] [[ScienceIsBad of]] [[GLaDOS Mysteries]], a literal GodOfEvil undressed and [[StrappedToAnOperatingTable penetrated]] Ami. Ami wasn't really enthusiastic about it and after it was over the Unraveller told Ami to call her up again. But Ami doesn't think so, because really, she didn't feel a thing while it lasted and was only sore [[OverlyLongGag afterwards]].
* A mod over at [[http://www.tohokingdom.com/ Toho Kingdom]] writes yearly holiday themed fanfics with members of the site as character. Last Christmas fic featured Cthulhu as the main villain. After the military fails epically to kill him, they get a pair of mecha from [[BadassSanta Santa Claus]] and manage to kill him.
* In ''Fanfic/{{Dumbledores Army and the Year of Darkness}}'', Ernie Macmillan has the stones to ''punch out a Dementor.'' Yeah, he goes down... but he ''tried.'' And he gave his [[spoiler: secret wife, Susan Bones Macmillan]] time to whip out her wand and summon her Patronus.
* During his first appearence in the ''FanFic/TamersForeverSeries'' [[spoiler: Chaosgallantmon absolutely [[CurbstompBattle DESTROYS]] both Azulongmon and Zuqhaiomon in about ten seconds flat]].
* In ''FanFic/ManchesterLost'', [[spoiler: Crowley punched Lucifer - In the FACE!!! There's also the part where War yells, "[[{{Satan}} Mommy]], you're an idiot!" followed by decapitation]].
* The Spore wiki fiction universe has a rather epic one involving the hero fighting and actually defeating ''Satan''(A.K.A. Kamik'Shi) and then sealing him in the sword that stabbed him.
* In HarryPotterAndTheMethodsOfRationality, Harry created a Patronus so powerful it was able to not just drive away a Dementor, but actively kill it.
* In ''Fanfic/SoulChess'', [[spoiler: [[MagnificentBastard Lelouch]] did what Ichigo in Bleach could only DREAM of and Geassed [[BigBad Aizen]] to kill himself.]] It's considered by many as Lelouch's greatest achievement in the fic.
* ''FanFic/ToKillAThief'': [[spoiler:Light shouting out about Dark Fin Fish.]]
* [[FanFic/{{Alex}} Alex]] really knows how to own Marceline in her press conference at the Candy Kingdom with her BadassNormal moves. Her fight with her father also counts to it.
* In the ''FanFic/PonyPOVSeries'', [[MyLittlePony G1 Mimic's]] DyingMomentOfAwesome involved kicking [[BigBad Discord]] in the face, ''several thousand times at the speed of sound'', which results in one of his teeth being permanently knocked out.
** The Mane Six's previous defeats of Nightmare Moon and Discord, of course, but they add two to the count with the defeat of [[spoiler:Nightmare Whisper]] and Applejack [[spoiler:teaming up with five alternate versions of herself to defeat [[MultiversalConqueror Nightmare Mirror]]]].
** [[spoiler:Pinkie and Minty managed to defeat Princess Luna with a musical number during the CosmicRetcon of G3. Even though Strife had weakened her, that's still a great accomplishment.]]
** [[spoiler:Cadence managing to defeat [[EldritchAbomination Havoc's Avatar]]. It may not have been NEARLY as strong as [[TopGod the real thing]], but that's still impressive.]]
** The Paradise Estate Ponies, even taking into account they had three Alicorns supporting them (all three were ''considerably'' weaker than him), managed to defeat Discord in a straight up fight with the Rainbow Of Light. [[spoiler: Unfortunately, [[NiceJobBreakingItHero Galaxia decided to shatter him]], allowing him to BodySurf into a new body.]]
** [[BadFuture Dark World!]]Spike manages to get the upperhand on Rancor, the Draconequus of Violence, Passions, and Anger, and force her into retreat temporarily. She is a young Draconequus, but still.
** There's also an AlternateUniverse Rainbow Dash being shown killing [[spoiler: Pinkie's [[SuperpoweredEvilSide Nightmare]], Nightmare Granfalloon]].
** [[spoiler: The Dark World Mane Six managing to defeat [[OneWingedAngel Odyne!]]Cruelty, first destroying her body (unfortunately killing the [[BodySurf possessed]] Sparkler in the process), then by blasting her soul with the Elements, banishing her from mortal reality.]]
** One that occurs offscreen was a mortal Pegasus, armed with the Concept Killing Spear, managed to kill the demigod Cupid, permanently, due to having a personal hatred of love. [[BrokeYourArmPunchingOutCthulhu Unfortunately]] for said Pegasus, Cupid was the son of [[MamaBear Venus]], who descended to the mortal plain in an UnstoppableRage and [[DoNotTauntCthulhu killed her before she could use the spear on Venus as well]].
** [[spoiler: The Dark World Mane Cast -- with [[CrisisCrossover help from the G1, G2, G3, and G4 (pre-Reign of Chaos) Mane Casts]] -- manage to defeat [[TimeMaster Nightmare]] [[TrueFinalBoss Eclipse/Paradox]] (who ends up [[FusionDance fused]] with Twilight) and her {{Psycho Ranger|s}} CoDragons (who are seemingly destroyed).]]
** [[spoiler: Shining Armor fights [[GeneralRipper Makarov]] -- an [[HumanoidAbomination Equineoid Abomination]]/PhysicalGod -- to a standstill during their FinalBattle, and earlier almost ''kills'' him after his BerserkButton is pushed to breaking point. Though Makarov is actually finished off by [[ClockRoaches the Blank Wolf]] instead. Speaking of, then the SA arc's GrandFinale has Shining and Cadence [[BattleCouple fighting the Wolf together]], eventually mortally wounding and killing it.]]
** A flashback episode gives the G1 Cast another example by [[spoiler:defeating [[EldritchAbomination Lilith]], the First Witch and a being composed of [[MadeOfEvil pure evil magic]] that could have [[OmnicidalManiac destroyed the entire world]], by Magic Star sealing her magic in the newly forged Alicorn Amulet followed by Megan blasting her with the Rainbow of Light to finish her off.]]
* From the same creator as the above, ''[[http://fav.me/d7vi0g9 My Little Pony G3 vs Hatred]]'' ends in with [[spoiler:the G3 Ponies using the combined love and tolerance of all four My Little Pony series to defeat an EldritchAbomination born from (or acting upon) the combined intolerance and hatred of G3 the fandom has (Alexwarlorn often takes meta and fandom tropes and makes a CosmicHorrorStory out of them).]]
* ''FanFic/MinesOfDragonMountain'': Twilight Sparkle at one point blasts [[spoiler: [[GodOfEvil Tirac]]]] through a ''meter thick wall of granite'' in order to [[MamaBear rescue Spike]].
* The ''FanFic/StallionsOfHarmonyVerse'': Early in the story, Shining Armor declares that he would punch Princess Celestia if she would ever go evil, earning him the "Princess Puncher" nickname. Eventually he does that to [[spoiler:Tyrant Celestia in a nightmare.]] Later [[spoiler:it is Prince Blueblood instead who punches Nightmare Moon. And that was after all other stallions, stronger, more combat experienced, couldn't so much as touch her. Needless to say, it wasn't very effective and only managed to piss her off even more than she was]].
* Fittingly, pops up near the end of the MLP[=/=]CthulhuMythos crossover fic ''FanFic/TheStarsWillAidTheirEscape''. Well, not Cthulhu himself (he doesn't show up), but [[spoiler: the Mane Six manage to defeat [[BigBad Nyarlathotep]] with the Elements of Harmony. They also kill the [[{{Mooks}} Dark Young]] and manage to banish [[BiggerBad Shub-Niggurath]] back where she came from, though they didn't actually fight her.]]
* In the one-year anniversary chapter of ''FanFic/YouGotHaruhiRolled'', [[SelfInsert the author]] wreaks havoc by summoning a giant, animate cheesecake which goes about destroying everything it comes across. The author spends so much time gloating that he is unstoppable that he doesn't notice the main characters travel through his portal to another of his fanfictions. The fic they travel to is ''The Obesity of Haruhi Suzumiya'', an AlternateUniverse fic in which every character is morbidly obese. They take this fic's version of Haruhi with them, and she [[BigEater devours the cake in a matter of seconds]]. Not to be outdone with that, Kyon defeats the author by informing him of the existence of a truly {{NSFW}} {{Doujinshi}}. [[note]]Which actually exists, but [[SincerityMode I would advise against looking for it.]][[/note]] The author's disgust makes him sink into a literal PlotHole, and Haruhi sits on him.
* ''FanFic/{{Austraeoh}}'': a flashback in the second installment, ''Eljunbyro'', has [[spoiler: Rainbow Dash, enraged by her friends' death, single-handedly channels the Elements' power to turn Discord to stone. She then proceeds to smash the statue to pieces.]]
** In ''Odrsjot'', [[spoiler: Rainbow at one point manages to knock out the Dragon matriarch Nevlamas - with some help from the Element of Loyalty.]]
* ''FanFic/HarmonyTheory'': Rainbow, Astrid and Star Fall acttually manage to [[spoiler: chase off Nightmre Umbra. However, Umbra is still regaining her strength.]]
* ''FanFic/TheGodEmpressOfPonykind'' has [[TabletopGame/{{Warhammer40000}} The Emperor]] [[spoiler: killing the Chaos Gods]], and Celestia and Luna fighting the Windigos in the Warp and destroying them.
* ''Fanfic/DeathNoteEquestria'': When [[spoiler: Applejack]] is exposed as the Third Kira, [[spoiler: she]] hits Princess Luna hard enough to send her stumbling back.
* ''FanFic/TheConversionBureauColdWar'': When Princess Xenole... I mean, Celestia repeated threatens a UN conference full of world leaders, and kidnaps and tries to ''justify the forced conversion of over 2,000 Chinese civilians'', RonaldReagan finally has enough of her shit and punches her right in the face.
* Almost literal example in a fanmade ''DeathBattle'' on devaint between Godzilla and Cthulhu. [[spoiler: It ends with Godzilla kicking Cthulhu so hard Cthulhu splits in half, and rips on of the halves up until there's barely anything left of it but mush and [[KillItWithFire incinerates]] the other with his BreathWeapon. The maker of the fight points out that Cthulhu being described as reforming made his apparently immortality seem more like a high grade HealingFactor that could be overcome if he's damaged enough, especially since Godzilla in a [[UnstoppableRage bad mood]] is often very thorough when he makes sure his enemies are dead.]]
* In the climax of ''FanFic/SonicXDarkChaos'', Demon admiral [[PunchClockVillain Firmus D'Arnazhee]] is so enraged when he discovers the conspiracy behind the Metarex war that he takes out his sidearm and ''shoots the Devil in the back''. [[DoNotTauntCthulhu It doesn't end well]].
* The current page image for Main/DidYouJustPunchOutCthulhu is of Series/TheFlyingNun elbowing Cthulhu in the schnoz, and it is awesome. Original image came from [[http://coelasquid.deviantart.com/art/Cthulhu-VS-the-Flying-Nun-86275733 here.]]
* Samwise Gamgee's canon Cthulhu-punching is lampshaded in the ''LordOfTheRings'' fanfic ''FanFic/{{Left}}''. Frodo is astonished when Sam tells him about his battle with [[EldritchAbomination Shelob]], and he's even more astonished that Sam does not seem to acknowledge how spectacular it was.
* ''FanFic/QueenOfAllOni'': [[VillainProtagonist Jade]] killing Kaito [[spoiler: and Ikazuki]] probably counts as this. Meanwhile, her and [[EnigmaticMinion Blankman]] managing to temporarily hurt [[AncientKeeper Nameless]] during the fight in the Vault of Endless Night definitely does.
** Speaking of Blankman, a flashback reveals how he singlehandedly managed to kill the entity that the cult he was raised in worshipped. For bonus point, it was implied to be [[spoiler: [[TheSlenderManMythos the freakin' Slender Man]]]].
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