* In ''Eva'' fanfiction, the PeggySue fic is ''extremely'' common, the most well-known being the doujin ''Manga/ReTake''. There are also fics out there that set up a ForWantOfANail situation, and then reveal that either the changes were actually caused by a PeggySue or some type of EternalRecurrence situation. There are also {{Crossover}} fanfics with a PeggySue. It's reached the point where [[EpilepticTrees some fans think that]] ''Anime/RebuildOfEvangelion'' is one of these!
* [[AfterTheEnd Post-Third Impact]] fic. This can range from Shinji and Asuka by themselves in a wasteland, to everyone coming BackFromTheDead and the world returned to (mostly) normal. Most of the time, Rei has vanished and Toji gets his leg back (both of which might be supported by canon).
* [[invoked]] There is a mini-genre of ''Evangelion'' {{Fix Fic}}s that work by making the setting CrazyAwesome. This was [[TropeMaker started by]] ''FanFic/ShinjiAndWarhammer40K'' and continued by ''FanFic/NobodyDies'' and ''FanFic/MobileFighterEvangelion''. The controversial ''FanFic/NeonExodusEvangelion'' might be considered an UrExample. Some people thought Rebuild was an official version... [[spoiler:[[DarkerAndEdgier until 3.0 came into the picture]].]]
* There have been several stories involving Shinji being raised by someone other than his uncle/teacher and exploring the ForWantOfANail aspect of how Shinji's personality changes. Sometimes Shinji gets raised on a product, like the aforementioned ''Shinji And Warhammer 40K''.
* Reincarnation fics, especially Kaworu/Shinji ReincarnationRomance. As well as explaining how the different canon continuities are related to each other, this gets rid of the pesky "Kaworu [[spoiler:is an Angel]]" problem. They are especially popular since the third movie of ''Anime/RebuildOfEvangelion''.
** The [[EpilepticTrees Epileptic Tree]] seeds for this particular idea (when it focuses on Kaworu) were planted on the ''Franchise/SuperRobotWars'' series, where Kaworu has implied on some of his appearances that his abilities as an Angel include the ability to live on multiple timelines/[[AlternateUniverse universes]].
* [[FusionFic Fusion Fics]] where the crossover element provide a well-needed [[TookALevelInBadass Level In Badass]] to one or more of the cast members, providing him/her with the tools to make some ''real'' change on the situation (sometimes it's probably something as simple as the "Crossover Element" giving them a DareToBeBadass speech-still, the "nail" in the "ForWantOfANail" that the fic covers came from elsewhere). While this is covered in some of the examples above, this has also been the drive behind some stuff like a minor niche of Evangelion SuperFic stories (example: the ''Fanfic/SuperwomenOfEva'' series, ''Fanfic/LastChildOfKrypton'', ''Fanfic/ShinjiIkiryo'', ''Fanfic/ThousandShinji'', ''Fanfic/ChildrenOfAnElderGod''), and one of the "Crossover Element gives pep-talk to Eva character" examples would be that of ''Fanfic/SeriesThirtyAndThreeQuarters'' (or ''"Shinji And [[Series/DoctorWho The Doctor]]"'').
* More Evangelions existing; sometimes just as a platform to have an OriginalCharacter as a pilot (or making one of the canon characters a pilot, [[AscendedFanboy like]] [[{{Otaku}} Kensuke]] for instance), sometimes to explore the political and personal ramifications of having to go to war against another country with an Evangelion (this became somewhat-canon on the ''RebuildOfEvangelion'' films).