History FandomSpecificPlot / OnePiece

* An OC from the real world gets pulled into the ''One Piece'' world and makes friends with the Straw Hats, Whitebeard or the Heart Pirates. Typically later falls in love with Luffy/Zoro, Ace, or Trafalgar Law. ''Fanfic/MarieDSuesseAndTheMysteryNewPirateAge'' is a DeconstructionFic of what would [[SurprisinglyRealisticOutcome actually happen]] if such a heroine got sent there.

* Following the popular crack theory that Crocodile is Luffy's mom, there are [=AUs=] where Crocodile is ''actually'' Luffy's other parent. One version of this fandom plot can lead to a canon divergence where Luffy, and sometimes even Crocodile himself, finding out their relations during the Baroque Works saga. Usually in these kinds of stories Crocodile will either know he has a child out in the world and nothing else but realizes Luffy is his through a plot contrivance, or he always knew and hoped to never come across him. Sometimes this can lead to Crocodile pulling a HeelFaceTurn but not always. Another version of the "Crocomom" fanfic is Crocodile raising Luffy himself instead of Garp but whether he still follows through on the Alabasta plan varies from author to author. In these stories Crocodile is usually nicer and more trusting than his canon counterpart.

* Fanfics where Luffy's time in the time skip is partially spent in a relationship upgrade with multiple members of the Kuja Tribe, not just Boa Hancock, is a small genre of stories that nearly always involves the jokes of him having multiple daughters and the revelation of the fact driving Sanji into a apoplectic rage at best, actual catatonia or complete mental collapse at worst.

* TimeTravel FixFic, often with a jumping off point of Luffy reaching Raftel but suffering great losses along the way (usually [[EverybodysDeadDave the entire rest of the crew]]), and the island's power somehow offering him the chance to SetRightWhatOnceWentWrong. This almost always involves saving Sabo and Ace as a matter of course.

* "Marine Piece" fanfics in which Luffy (often but not always with Sabo and Ace by his side) become Marines instead of going down the path of piracy. Fanfics with this premise often deal with the conflict caused Luffy's freedom loving ideals clashing with the corruption and oppression found in the Marines. Other common elements include: Luffy not having a Devil Fruit, instead being trained in Haki by Garp from a young age, Aokiji being the Shaks equivalent for Marine Luffy, and Koby, Helmeppo and other Marines (canon or OCs) taking the place of the Straw Hats.

Most of the fanfiction for ''Manga/OnePiece'' seem to have the same few plots over and over again:

* Long before [[DemBones Brook]] joined the crew, it was widely speculated that the musician that the Straw Hat Pirates would eventually recruit would be a young, beautiful woman. After the Thriller Bark saga came and went, there were still fan storylines where a young, beautiful woman joined the Straw Hats either as part of an AlternateUniverse or as a precursor to Brook.

* Luffy eating a different Devil Fruit than canon or (more rarely) losing the Gomu Gomu no Mi and getting a different fruit later. Logias, particularly the [[ShockAndAwe Goro Goro no Mi]], are especially popular choices. [[spoiler:These plots are HilariousInHindsight as of chapter 1044, where it turns out the Gum-Gum Fruit ''isn't the Gum-Gum Fruit'' -- that's just a name the World Government to hide its true identity as a Mythical Zoan model of the Human-Human Fruit, which basically turns the user into a RealityWarper who runs on ToonPhysics.]]

* Luffy eating a different Devil Fruit than canon or (more rarely) losing the Gomu Gomu no Mi and getting a different fruit later. Logias, particularly the [[ShockAndAwe Goro Goro no Mi]], are especially popular choices.