Kaguya's sealing goes wrong & to save herself she detonates herself, exploding & destroying everything & sending him to god knows where and allows him to Negate what shouldn't be possible. Waking up he finds himself on a massive whale boat with the tallest man he's ever seen looking over him who calls himself a pirate, offering to help him as he figures out where he is - Harem

In a world unfamiliar to him, Koby, a former marine captain from another realm, finds himself in the midst of the ninja village of Konoha. Tasked with adapting to this new reality, he becomes an unassuming hero to the people, earning respect through his honesty and dedication.

Jump into the fun as Straw-Hat Pirates Luffy and Zoro travel to a new world to stop an evil Warlord from taking over the world

On the day of the eclipse, Zuko had finally come to the realization that he no longer wants his Father's approval. He wanted to find and help the Avatar defeat him and free the people of their world from the Fire Nation's century long reign of tyranny. Everything was perfect. He had no way of knowing that a mysterious man with a Straw Hat would soon flip that on its head.

A Crossover Story between Zaru and Juubi-k. As Yamato, Son of Kaido, heals from her wounds from a battle against her tyrannical father, a chance meeting with a injured boy in green opens her world. And that world, will change. The boy's name? Midoriya Izuku. For Questions, refer to FAQ in story(after Chapter 15)

Fate has an interesting sense of humour, as Harry Potter finds out the hard way... Reborn his life isn t an easy one. After his mother died and his father is killed by a mob, he does his best to take care of his little brother. How would the unsuspecting world deal with the Man-who-conquered and his willing accomplices?

In a world where heroes with extraordinary powers protect society, a young man named Ace, with the mysterious ability to control fire, finds himself thrust into the ranks of heroes-in-training at UA Academy. Struggling with amnesia about his past life, Ace forms friendships with fellow students, including Itsuka, Mirio, and Nejire, as they navigate training, classes, and life.

To keep this simple this is simply a Tenshinhan harem adventure in One Piece.

Trials and Tribulation. Every pirate has experienced these things when they sail the Grand Line. Maxwell sailing with Straw-Hat Pirates have had their own fair share of troubles along their journey. Now they're close to half way mark, but that doesn't offer a reprieve. No. This is the beginning of a long, long night.

After being given a collection of DVDs of an anime they've never heard of, Class 1-A and their teachers decide to watch it in their free time.

Wealth, fame, power, Gold Roger, the king of the Pirates, attained everything this world has to offer. The words he uttered just before his death drove people to the seas, and some men head for the oceans and continents of Remnant in pursuit of their dreams! "Straw Hat" Monkey D. Luffy decided to follow this path, but how he will achieve in a world between light and darkness.

Hachiman Hikigaya, a recently promoted soldier within the Marine ranks, suffers the misfortune of being chosen as one of the combatants at Marineford. However, as they say, miracles can happen in the midst of a storm, and Hachiman manages to attain a power that changes his life forever.

This is a time travel story . What if Luffy and the crew (new members included) went back in time to help rocks destroy the world government? What if Rocks was a bit different than portrayed in the anime? This has a slight Naruto crossover part to the story. Things like a Fishman Kisame, and Snake devil fruit Sasuke.

A self-insert lands in the MHA world, only to think she's in the One Piece one. She proceeds to bring the latter's insanity to the former by copious amounts of Devil Fruit jailbreaking. Watch as the Copy Woman turns logic upside down and makes you question everything you knew, or her name isn't D (it isn't, she just calls herself one).

The Wizarding World and the Muggles are in peril as a cataclysmic event changed the future of the World forever. A mysterious and unique clan, the Will of D, saves the humans from the purges of the Celestial Dragons who have an iron grip on Mankind. Alas, Lord Voldemort lay in hiding...

an Omake story

Amidst an enigmatic island's ancient statues and the flames of destiny, Roronoa Zoro discovers a guardian from ages past. As swords clash and mysteries unravel, a new companion joins the Straw Hat crew, setting the stage for an uncharted journey into the heart of the Grand Line.

Una serie de eventos ocasiona que All Might decida aprovechar la llegada de unos piratas del pasado para realizar un viaje hacia las ruinas de la Gran Linea.El joven grupo de héroes involucrados se entera de sus planes decidiendo traerlo contra su voluntad quedando a merced del tempestuoso mar, obligándose a cooperar con los piratas, descubriendo así en el camino...Un mundo perdido

"Blades Across Time" follows Roronoa Zoro, as he finds himself lost in Tokyo during the Meiji Era. Amidst unfamiliar surroundings, he encounters Kenshin Himura. Zoro's journey takes an unexpected turn as he navigates the challenges of the era, forms an unlikely camaraderie with Kenshin, and engage in a spirited spar that transcends time and swords. Just a simple one-shot.

What if Frisk from Undertale went to the world of One Piece? See what happens as Frisk goes on a new adventure!

Someone who died and was reincarnated into a fictional world, but he also got the Mission to purify the Hollows who escaped from Hueco Mundo.

All Might decides to take advantage of the arrival of an unknown pirate crew from the past to make a voyage to the ruins of the Red Line. Simultaneously, the heroes engaged learnt of his plans and decided to bring him back against his will, leaving themselves at the mercy of the wild sea, forcing them to cooperate with the pirates and discovering along the way... A lost world.

4 kids got teleported into my hero academia world they all split ways going on their own path Marine/hero villain/pirate BountyHunter/vigilante Revolutionary/MetaLiberationArmy

AU crossover with One Piece, part of What if Naruto was raised by…? challenge. Monkey D. Luffy and his younger brother Fox D. Naruto travel the East Blue to find a crew so Luffy can become King of the Pirates and Naruto a Kage. Please R&R

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