* ''TheLandBeforeTime'' fanfiction. Considering that the series is set in a relatively limited environment (prehistoric times), whenever one writer does something different that gets respect, you can expect to see a ''lot'' of clones pop up. Such types include war stories, {{time travel}} stories, crossovers. Not that these fics are necessarily ''bad'', but they tend to all come at once as trends, resulting in you finding that all new fanfics lately are centred around Chomper perhaps, while you were particularly hoping for something based more on the main five characters.
* Count the number of ''{{Anime/Pokemon}}'' fanfics which focus on an original trainer, who sleeps in on the morning when they're supposed to receive their first Pokémon, arrive at the lab only to find that all the usual starters are gone and instead get a completely different starter. Very often a rare and valuable Pokémon. Almost always an Eevee. Their goal is always [[ToBeAMaster to become a Pokémon master]]. To be fair, this is the purpose of the main series. The use of Eevee has generally slowed down, but OC journey fics are still the same even without Eevee.
** There are sometimes fics that appear to be OC journeys at the start, then have a twist at the end that makes you think "what the heck..." until you re-read it. Then there are Pokémorph fics where a human turns into a Pokémon with no prior warning...
* At one time, there were far too many ''Manga/CardcaptorSakura'' fanfics that blatantly copied each other; as soon as someone comes up with something unique and interesting, a wave of people start ripping it off right down to the last joke and plot point.
* According to the FanFic/ReunionsAreABitch universe the Colonials of ''Series/{{Battlestar Galactica|Reimagined}}'' were huge wankers before the Cylons kicked their collective arses to the curve, what with the whole starting a holy war against Earth thing. Naturally, the story was so popular that now there are dozens of different fics detailing the Colonials getting in over their heads while trying to TakeOverTheWorld. Most commonly these involve crossovers with ''{{Halo}}'' or ''Series/StargateSG1'', but other types do exist.
* Cassandra Claire's Very Secret Diaries for ''Literature/TheLordOfTheRings'' fandom inspired several copycats in several fandoms, some acknowledging their inspiration coming from her. Even to this day, several years after their creation you still see some of her more infamous quotes scattered about fandom.
* Speaking of Cassandra Claire, ''TheDracoTrilogy'' started ([[TropeNamer and named]]) the DracoInLeatherPants portrayal of Draco Malfoy. It also started or at least popularized some other ''Harry Potter'' fanfic clichés, like making Draco more sympathetic by portraying his father as an abusive bastard. The funny thing is, the vast majority of young fanfic writers who currently use these clichés have likely never heard of Cassandra Claire. They just copied them from earlier fanfics, who copied them from still earlier fanfics and so on, going all the way back to ''The Draco Trilogy''. Cassandra Claire also popularized the idea of certain characters being "Magids", which are especially powerful wizards. When ''The Draco Trilogy'' was at its height, the concept of Magids was borrowed by numerous other ''Harry Potter'' fanfics, but now it's a ForgottenTrope.
* 75% of all Dragonball Z fanfiction starts with an alien spaceship crashing down on Earth, and ends with a character using a new form of Super Saiyan to beat them. It will also be set during the 3 months before the Androids, the 7 years before Cell or the 10 years after Buu. Other common elements include Vegeta or Broly getting possessed by Babidi, Buu or Cell absorbing someone new or each other, Saiyans inexplicitly growing back their tails, Bardock being rewritten as an honourable anti-hero and Future Trunks travelling to New Namek to use the Dragon Balls there.
* The current trend among people who write {{Troll Fic}}s (or who just want a lot of reviews and attention and don't care about the quality of their work) seems to be to copy ''FanFic/MyImmortal'''s format, issues with spelling, MyChemicalRomance references, and [[MarySue Goth Sue]] main character.
* For a while, there were ''GundamSeed'' fanfics following the lead of ''[[http://www.fanfiction.net/s/2384630/1/Brothers_in_Arms Brothers in Arms]]'' by having a DefectorFromDecadence join the crew of the Archangel at the series' start and cause changes to the canon from there.
* In 2001, Potato Salad of Fanfiction.net wrote ''Ask Sonic (and other associated characters)'', which had reviewers sending questions through reviews or e-mail and having SonicTheHedgehog and the rest of the cast answering them as fan mail. It became very popular and soon numerous ''Ask Fics'' began to show up on Fanfiction.net until it and other interactive fanfiction were banned from the site.
** Oh, they're still there. The ''AxisPowersHetalia'' section of Fanfiction.net is currently being saturated with them...
*** Yes. 'Tis very annoying, especially since Hetalia is based on history, much of which would make a great story concerning these characters, if written well
* Nearly every ''Literature/HarryPotter'' story in which Harry is betrayed and sentenced to Azkaban follows the exact same [[Literature/TheCountOfMonteCristo template]]: Most of his friends repeatedly KickTheDog, and instead of dying or going insane, Harry becomes a GodModeSue in prison and later wipes out Voldemort and all his Death Eaters with a single attack. Depending on the author, he then proceeds to kill everyone else as well or spend the rest of the story brooding with those who stuck by him (usually Snape, Neville, Luna, and a few others), while those who betrayed him plead for his forgiveness.
* ''[[Fanfic/EigaSentaiScanranger Eiga Sentai Scanranger]]'' was created to let its author complain about ''Franchise/PowerRangers'', yet seems to have taken quite a few cues from the imported show. Interesting is one scene where the blue ranger flies off the handle at the changes made in ''Series/PowerRangersDinoThunder'', but no mention is made of how the character concepts for Mesogog and Elsa are almost identical to two villains from ''Scanranger''. The BigBad is a former colleague of the team's mentor sharing his body with an evil presence, and the lone female villain wears black leather and spies on the heroes via her job at their school (Scanranger did it first).
* ''[[Fanfic/NobodyDies NGE: Nobody Dies]]'' have spawned a whoppingly large ExpandedUniverse around it. The author of the original even made some of these canon, like ''Ichi's Birthday Party'', ''The Story of NERV-Alaska'' and ''The Kei Files''.
* ''WesternAnimation/TotalDrama'':
** The "me too" mentality is the reason why this fandom is known largely for its (in)famous "Starring You" stories.
** Many [[FandomSpecificPlot competition stories]], "Starring You" and otherwise, borrow liberally from the early ''Total Drama'' fanfic, ''Fanfic/{{Total Drama Comeback|Series}}''. Writers of ''Comeback''-influenced stories commonly acknowledge that influence or even dedicate their stories to its author.
** When ''[[Fanfic/TotalDramaChris Total Drama Alphabet]]'' appeared, with its conceit of one contestant name for every letter of the alphabet, a host of imitators followed.
* The ''Franchise/MassEffect'' section of fanfiction.net was known for having relatively few self-inserts. Enter Herr Wozzeck with his self-insert ''FanFic/MassVexations''. After that, a great number of self-inserts began to show up around the website, with varying results.
* ''FamilyGuy'' fanfiction was never too great, until a guy named Malcolm Fox wrote a story named [[FanFic/MegsFamilySeries Meg's Boyfriend]]. The story was funny, amusing, had a varied cast of characters, hilarious [=OCs=], great plots, and [[OriginalFlavor it emulated the show's essence like no other fanfic]]. Many other authors began to write similar stories, in an attempt to achieve Malcolm's success.
* Once upon a time, a fanfic writer called Roxius wrote a CrackFic for ''Anime/CodeGeass'' titled ''[[http://www.fanfiction.net/s/4730588/1/You_Got_LuluRolled You Got LuluRolled]]''. This spawned many similar [[CrackFic Crack Fics]] in several different fandoms, not all of them titled with some variation of "You Got [Character Name] Rolled!" Most of the imitations are actually derived from superstarultra's ''[[LightNovel/HaruhiSuzumiya Haruhi]]'' version, ''FanFic/YouGotHaruhiRolled'', which is generally considered superior to its inspiration.
* Quite a few ''[[LightNovel/ZeroNoTsukaima Familiar Of Zero]]'' fanfics have been made with the premise of 'What if X got summoned instead of Saito?' All of them were complete crap, at least until gabrielblessing's ''[[Fanfic/TheHillOfSwords The Hill of Swords]]'' came along with its lauded execution of the concept. One well-timed Plot Bunny thread later, [=SpaceBattles.com=]'s Creative Writing forum was flooded with copycats. A fair few of these, such as ''[[Fanfic/{{Unfamiliar}} Unfamiliar]]'', ''[[Fanfic/ZeroShock Zero Shock]]'' and ''[[FanFic/ShadowOfZero The Shadow of Zero]]'' match or exceed the original in quality.
* Since the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fanfic {{Progress}} became popular, it has become commonplace for other writers to portray Princess Luna with a CompanionCube abacus.
** Same with ''{{FanFic/Cupcakes}}''. Ever since it became popular, there have been many other ''My Little Pony: Friendship Is Magic'' [[DarkFic dark fics]] set out to copy it's success.
** The same also goes for ''[[{{Fanfic/MyLittleDashie}} My Little Dashie]]'', which has become a FandomSpecificPlot to the point where it's almost a Fandom Specific ''Trope''. Nowadays, knock-offs of it with another pony in the place of Rainbow Dash are a dime-a-dozen, and not one of them has gained as much fame / infamy. It seems to have tapered off lately, partly because the story has developed a sizeable {{hatedom}} (which it doesn't really deserve) and partly because there's really only so much you can do with the plot and it's been worn absolutely smooth.
** Often there are (usually unauthorized) fan-sequels written for popular stories, many of which have a completely different writing style and a tone that is sometimes quite changed from the original. The good ones stand out on their own so that they can be seen as an extension (or in some cases, a {{Deconstruction}}) of the original author's work, and have plenty of fresh ideas to make them just as likable if not more so. The bad ones are nothing more than cheap attempts to try and ride the coat-tails of another author, and are quickly derided as such by reviewers.
** ''Brony in Equestria'' stories (where the [[AuthorAvatar main character]] is usually male, has knowledge of the series and more often than not gets turned into a pony and has [[GodModeSue incredible powers]]) are so widespread and often of terrible quality to the point that EquestriaDaily has banned them completely, and in general they are also frowned upon elsewhere unless they are ''very'' good. Go to the My Little Pony section of FanFictionDotNet or Website/FimfictionDotNet and you are almost guaranteed to find at least one or two stories of this type on the main page, due to the ''massive'' LongingForFictionland this series has. This is not to be confused with ''Human in Equestria'' stories, where the character(s) have no knowledge of Equestria or its inhabitants whatsoever.
* An interesting trend has popped up amid the MahouSenseiNegima fanfic authors. After ShadowCrystalMage popularized the idea of crossing over Negima with MagicalGirlLyricalNanoha, a few other authors have taken up the mantle. Currently, Mage and two others are writing stories in which negi is sent to Uminari as a teacher for Nanoha after the events of A's. Ironically, one of the copycats, Zephyr-Fiction's FanFic/EqualAndOppositeAttractions, has garnered the most press. Mainly this is because Mage has many more projects on his plate.
** It helps that both Anemoi(Zephyr-Fiction) and Shadow Crystal Mage have a tendancy to bounce ideas off one another on [[http://tvtropes.org/pmwiki/posts.php?discussion=x7qwds45w7je04xdlt51q783 this very site]].
* Common Itachi/Sakura plots in {{Naruto}} fic involve Sakura running off to get Sasuke back from Orochimaru's clutches, and getting captured/used as bait for Naruto by Itachi. Many cite [[http://www.fanfiction.net/s/2633721/1/Metamorphosis Metamorphosis]] as inspiration or influence.
* Everybody wants to write about what Literature/SherlockHolmes did during his Great Hiatus (the three-year period during which he faked his death), right? It's been the subject of numerous pastiches and online fics. [[http://www.fanfiction.net/u/1460858/aragonite Aragonite]] a.k.a Marcia Wilson has made the argument that none of these stories, however, deal with [[TheWatson Dr. Watson]], InspectorLestrade, and UsefulNotes/ScotlandYard, and the [[CanonFodder adventures]] ''they'' must have been having in that time period. So she wrote her own series, which she plans to convert into self-published books. Thus far, only one other {{Fangirl}} has taken up the torch, so to speak, but that's not the only thing Aragonite started. She was arguably the first FanFic author to give any serious depth to the men of UsefulNotes/ScotlandYard and use ''them'' as the protagonists, rather than using Holmes or Watson. She also bestowed the name ''Geoffrey'' upon Inspector G. Lestrade, and that name has gained popularity among both the canon and Series/{{Sherlock}} branches of the fandom.
** The FanFic series following in Aragonite's footsteps is the ''Fanfic/DeliverUsFromEvilSeries''. The name "Geoffrey" is also used.
** Another fic on the wiki to utilize the name "Geoffrey" is ''Fanfic/AStudyInRegret''. Incidentally, the author was inspired by the ''Fanfic/DeliverUsFromEvilSeries'' and dedicated the fic to ''that'' author.
* The ''{{Naruto}}'' fandom has started a following of SelfInsert via {{Reincarnation}} fanfics - the AuthorAvatar[=/=]OriginalCharacter is reborn into the Narutoverse. Although the first noteworthy story to try this might well be ''[[http://www.fanfiction.net/s/4842566/1/Only_a_Moron Only a Moron]]'' by swabloo (which actually veers into DarkFic territory at times), this trope is applied to ''[[http://www.fanfiction.net/s/7347955/1/Dreaming_of_Sunshine Dreaming of Sunshine]]'' by [[http://www.fanfiction.net/u/315314/Silver_Queen Silver Queen]]. In addition to having a likeable, relatable person as protagonist (Shikako Nara is ''no'' MarySue), ''[=DoS=]'' touched on other (innovative at the time, at least) elements: the person being "chakra sensitive", since having memories of their past life means chakra is an unfamiliar feeling, like an extra limb; trying to ''not'' change things too much because they're aware of how the ripple affect could render their knowledge useless; feelings of alienation from their friends (even while befriending even Naruto); not remembering all significant details due to fading memories over time; and most of all managing to focus on the protagonist without making it feel like the world (or story) revolves around them.
** The nice thing is that many of these authors try hard to ''not'' copy the same formula, even with this sort of inspiration. For example:
*** In ''[[http://www.fanfiction.net/s/8139663/1/Little_Acorn Little Acorn]]'' the character is blind, does ''not'' remember her past life beyond flashes, and instead of being the sister of a noteworthy or popular character, her older brother is Yoroi Akado (a MauveShirt at best in canon).
*** In ''[[http://www.fanfiction.net/s/8094086/1/Distorted_Reality Distorted Reality]]'', the main character is given bumps at the start: she's a prideful teenager reborn into the Hyuga clan (more specifically, the branch family), and must deal with the Curse Mark, all that's associated with it, and the harsh life of a ninja. On top of that, while unike LA she remembers her past life, she knows nothing of the Narutoverse in return.
* If you go onto [[http://www.outpost31.com/vistar/fanstory.html the official fansite]] for ''[[Film/TheThing1982 The Thing]]'', you'll find a lot of fanfiction of various sorts. Given that both films (but especially the 1982 movie) end on a very ambiguous note, a lot of fanfics will attempt to explain what happens next. The majority of these stories tend to keep to the very bleak ending of the movies, often involving one of the two survivors being revealed to be a Thing and/or a later encounter with the Thing. However, the story FanFic/UnfinishedBusiness was a deliberate attempt to break from this trend with a much more optimistic tone.
* While [[OlderThanTheyThink not the first]] fanfic to explore [[http://www.fanfiction.net/s/6281893/ servants from other media sources]], [[Fanfic/FateZeroSense Fate: Zero Sense]] is known as the most popular take on this, with equal parts action and comedy. Several other FateStayNight and FateZero fanfics explore this possibility, and most of them admit they were inspired by The Infamous Man's story, right on the summary no less.
* [[ShamelessSelfPromotion Voltalia]] has admitted to liking the idea of giving her favorite shippings [[UntoUsASonAndDaughterAreBorn mixed-gender twins]], so much so that when she created mixed-gender twins for the popular ''Superjail!'' FoeYay shipping Warden/Mistress, another author put them in upon the suggestion of a reviewer on [[http://www.fanfiction.net/ FanFiction.net]] when she decided to write in the Mistress being pregnant in [[http://www.fanfiction.net/s/8803490/1/Extended-Stay Extended Stay]]. It looks like they're going to be quite popular.
* Though possibly not the first, after FanFic/TheLegendOfSpyroANewDawn was made, fics where Spyro and Cynder must go on a new quest with a bunch of {{Original Character}}s and a few characters from the classic series rewritten to fit VideoGame/TheLegendOfSpyro verse became shockingly more common. See FandomSpecificPlot for more details.
* ''FanFic/RhymeAndReason'', the very first ''WesternAnimation/ChipNDaleRescueRangers'' FanFic (written from 1993 to 1995 and published in 1996), first [[AvertedTrope averted]] this trope and then played it straight. The aversion was that a story [[DoorStopper that long]] and well-written did not inspire other fans to write their own fics at first, but instead intimidated them because they knew they could never even achieve half of it. It was another story published in 1997 which finally kicked off the general FanFic writing, but ''FanFic/RhymeAndReason'' set the general tone for most ''CDRR'' fics to come — DarkerAndEdgier, giving the Rangers more serious cases to solve, more dangerous opponents and more emotional turmoil.
** ''FanFic/RhymeAndReason'' established Chip and Dale's [[FanNickname fan-given last names]], Maplewood and Oakmont respectively.
** Also, like ''FanFic/RhymeAndReason'', most ''CDRR'' fics are "pro" (which refers to Chip×Gadget; "anti" would be ''no'' Chip×Gadget, for example, shipping Gadget with someone else or decidedly not at all).
* While ''Webcomic/OfMiceAndMayhem'' did not kick off a wave of ''WesternAnimation/ChipNDaleRescueRangers'' FanFiction {{Graphic Novel}}s, many authors of later stories found the idea of Tammy being a nurse to their liking.
* After seeing the popularity of Screw Attack's DeathBattle series, DeviantArt user [[http://dimension-dino.deviantart.com/gallery/ Dimension-Dino]] followed the same style for writing his own, which has so far spawned dozens of imitators. Coincidentally, while the hosts for all the writers started as carbon copies of [[AffablyEvil Wiz]] and [[AxCrazy Boomstick]], they gradually began to [[CharacterizationMarchesOn develop their own personalities]], such as Dimension-Dino's Ray developing into a legimate case of TheStraightMan, unlike Wiz.
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