Tomie from Junji Ito's works reincarnate in the One piece universe as Luffy's twin sister. (I won't continue this story. I hope someone with more imagination will take over. Do as you want. Also, don't try to contact me. I won't answer.)

Mario thought that today he'd only eat cake with the princess, but bet he was wrong! he believed this was just poor luck, but little did he know that this was the beginning of a huge adventure. rated T for violence, swearing, and stuff! (note: most of the stories(until 32) are copy-pasted from the one piece wiki)

When the Straw Hats stumble upon an ancient lamp, they can't resist making wishes. Watch as their dreams materialize, leading them into an exciting new adventure. This tale unfolds in an alternate universe with a harem twist.

A prophecy revealed too soon, a promise given. A hero's fear, a maiden's love, destiny is shattered as they find themselves washed upon a new shore. AU, Slowburn, Set before OP canon, Will be epic in length

Black Zetsu refused that his work all these centuries was for nothing and decided to destroy the shinobi world he influenced, and in doing so Naruto found himself in a Land eerily familiar to his home. Finding this Land is troubled and wanting a place to belong. Naruto decides to use the ruins of his past to help this country. His future is unknown in this pirates infested world.

What happen when three neogenes are sent in a world of pirates? What happen when they meet three boys who gave them a meaning of life? Let's just say there will be humor and whole lot of chaos.

Before the advent of quirks, the world was already in chaos, engulfed by mysterious and destructive forces. The appearance of the first fads was only the spark that finally plunged the world into chaos and fear. To curb this growing chaos, the most powerful powers came together and created an organization known as the Marines.

Naruto didn't save the shinobi world out of the kindness of his heart or his love for it. He had already had enough of all the physical and emotional damage he had suffered, so he made a pact with the Sage of the Six Paths. An agreement to start a new life in another world, a world full of pirates. naruto/harem

"C'est avec de l'argent sale qu'on construit des hôpitaux". Comment ne pas accorder de crédit aux bienfaits du crime quand les lois s'obstinent à vouloir briser une famille qui n'a rien demandé à personne, sinon une seconde chance ?(fem!Ace NoHorcruxe!Harry- !Dumby/Ron/Ginny/Molly Bashing)

My tribe, who once called the Redline home, endured 800 years of suffering thanks to the World Government and those damn Celestial Dragons. If these so-called "gods" and their stupid followers insist on continuing down the dark path they find themselves on, then I will gladly become the devil that drags them down into hell and show them what "true" justice really means!

After USJ, All Might decides to get some help early. He takes Izuku with him to I-Island, where he meets Melissa Shield and several of his classmates who are also on the island. Following a day of fun, Villains cause trouble, forcing the teens to step up. After a victory party in Melissa's lab, Mei makes an oopsie causing Izuku and his friends transported to a very strange Sea...

After his father's mistakes catch up to him Ranma's offered a job by Belldandy and Urd: to take on the role of heroes in other dimensions who have failed in their destinies. Sent into the One Piece Universe, his mind merges with Luffy's as a baby. What effect will a smarter, more battle-hardened Luffy with unheard of skills make in this screwed up world? Should be fun to find out!

Inspired by EmmaIveli's Monkey D Haru Series. After Voldemort's failed attempt on his life, Harry Potter was presumed missing and dead by the ministry, but he very much alive and a member of the Pirate King's crew. Now, he is coming back for school.

Kaido gave Crow two choices: join the Beast Pirates and create an unstoppable army for him, or die, and he'll give his family a fate worse than death. Having no other choice, he joins but promises he'll make the Strongest Creature in the world pay. (Massive crossover, powerful mc, large harem, and other surprises.)

After being transported to a world where Marines and Pirates fight on the sea, Naruto joins the adventures of the Straw Hat Pirates. Let's see what he gets up to. Rated M to be safe. Naruto/Harem. NOW IN WANO! Slow updates to let the anime/manga update

What happens when Naruto joins the Straw Hat Crew? Read and find out. Story starts at the Arlong arc. Rated M to be safe. Naruto/Harem. In the process of being Beta'd. NOW IN WANO, so slow updates to let Anime/Manga update.

Becoming a pirate captain in a fantastical world was never in Ranma's life plans. But when magic strands him in the Grand Blue, he has no choice. With an impish wizard as a guide, Ryoga as his navigator, and a crew made of unwanted fiancees (plus Nabiki), Ranma sets out to find the One Piece and return to Nerima!

Mario and Luigi are on a multiversal adventure to find the missing power stars. Will their actions have dramatic changes to these worlds and will it have unforeseen consequences. Only time will tell.

Destiny always has a unique way of leading each person to reach the peak, but not all humans can reach that peak even though fate has shown the way. Zen'in Maki never thought she would be thrown into another world when she felt death would come to her. However, is it just a coincidence? Or is it the Destiny of the Universe that will guide her?

Modern!AU Naruto and Sakura decided to throw a party on their last Christmas before graduating. They invited the other straw hats to celebrate and they hope Luffy and Nami get together. The questions is will they be strong enough to confess their feelings?

Long ago A girl was saved by a straw hat wearing boy only for him to disappeare as soon as he appeared Now 12 years later he appears again. Will they remember each other ?

After the great escaped of Egghead Island. Luffy and his crew were sailing thru the seas, just after another day in the seas... Until one night... it was stormy, cold, dreadful night that no pirate, sailor, or marine can survive. Luffy was unfortunate in this dead night of the storm he slip during the storm as he fall into a portal as where Luffy takes him... so does other souls

Mew get's pull through a dimensional portal one day, ending up on the same boat as Monkey D Luffy as he sets out on his adventure. The pair quickly bonding over their zest for life. The only result can be chaos. Skirts the border of crack.

After sailing for some new waters around the New World, the Straw Hats pirates find themselves stuck in a new modern world full of technology and super power individuals all calling themselves heroes .Now while stuck they have to do some things not heroics to get back to their world.

Luffy is a young boy who wants to join an adventure guild. Once he turns 17 he joined one where he meets a girl named Rebecca and a little bot named Happy, he joined them to go into some space adventures. He meets a bunch of cool new people like Shiki, Weisz, and Homura. Along the way they meet strong and smart people like Zoro, Nami, Usopp, and Sanji. On the search for Mother!