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.

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...

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

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.

During an attack from the LOV a group did a sneak attack on Izuku. When Izuku was attacked and disappeared from that earth. About a month later he returned. But for Izuku it was longer. Join Class 1-A and Izuku's friends as they discover how Izuku has changed. (MHA X One Piece X Seven Deadly Sins)

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)

Part of the Devil's Dreamers story. Amid all the crazy adventures, battles, ups and downs? Its important to take time to unwind and enjoy the holidays with those you love. And Izuku and his crew are doing so in style at the Midoriya Fun Complex! Takes place after the 'Two Heroes' arc, mild spoilers. HAPPY HOLIDAYS!

When Izuku awoke on a strange island, he wasn't ready for the world of grey that had opened up to him. After eating the Tachi-Tachi no Mi, he finally got the power he always wanted

The last thing Midoriya remembered was being overwhelmed by a crowd of civilians that were being controlled by the third assassin sent by All for One. But suddenly, he found himself in the middle of a bloody battlefield, surrounded on all sides. Whitebeard had no idea who this new arrival was, but he wasn't going to complain as the stranger defended his son from Akainu.

The characters of Overlord and One piece (Wano Kuni arc) in the universe of MHA? What scenario could this create? Wars ? Alliances? The end of the heroes? The victory of the villains? being at the side of All Might, Galadriel and Luffy, Deku will understand that being a hero is never easy and that everyone has his own definition of justice.

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.

"Destiny. Fate. Dreams. So long as people cling onto these words? They shall not vanish." A new age of heroism begins when two children are lost at sea and wash ashore, befriending others like them and moving the change the world no matter what. Rated for Bakugo language. TVTROPES page underedo! FINAL REVISONS DONE!

A fun, but slow paced story about three people, Izuku Midoriya, Monkey D. Luffy, and Ryuko Matoi, as they try and achieve their dreams! This story is a crossover between One Piece, My Hero Academia, and Kill La Kill. Updates erratically.

Returning home stronger than he had left, Izuku no longer fits in the world he once called home. Both heroes and villains view his power as a threat and work to remove him. Faced with bending himself to his world's norms or breaking them, Izuku embarks on his journey to become the number one hero, while a world-ending disaster lingers in his shadow. Sequel to IMEA.

Izuku Roronoa-Dracule is trying to find his place in the world of superheroes along side his best friend Katsuki and their parents. One Roronoa Zoro and Dracule Mihawk, and Shanks and Mizuki Bakugou. As the boy's parents are Heroes and a fashion/tec support hero.

Class 1-A are training daily to become future heroes of Japan, but being heroes may need to be put on hold temporarily as they encounter a villain in a surprise attack. One thing leads to another, and some of the class end up stranded on a floating raft that is found by a pirate crew who have just arrived into the New World.

An otaku nerd gets dumped into the body of Kaminari Denki and has eaten the Goro Goro no mi. After receiving training from a strange individual that may or may not be a god, he goes on the challenge the world of My Hero Academia with a storm on his back.

All Might and All For One are beating each other up but due to Tartaros' interference they end up bringing in a random girl. What changes will this bring to our cinnamon roll? Fair warning, the story is in Spanish so you might want to use the translator on your PC or the fanfiction app itself, because I honestly don't know how bad it could end up if I somehow translate it into Engl

Gomi is a special kid...maybe a little TOO special. When he was little, he wanted to be a pirate king, much to the confusion of his older brother and father. However, he wanted to help people, so he wanted to try and become a Hero, and go to the school his brother went to, UA. However, he sometimes feels like something is taking over his body...but he's still him. MHA/OP Xover-ish.

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.

It was 25 years ago. As Gold Roger sailed the seas as the King of the Pirates, green light appeared all over the world, and they continued to appear to this day. And as they did, they would drop off people from other worlds. One day, a certain green hero appears. He meets new friends, goes on adventures, and decides that he doesn't like a certain government and how it runs things.

The Great Pirate Era ended thousands of years ago. But somehow one document has been left, this one document had changed society forever. In the world of My Hero Acadamia a man wanted to become the King of Heroes (Luffy in MHA)

Rena led a simple, boring, lonely life until one day she met a being from another world. A Guardian who protects the Realms, and she needs Rena's help to save everyone. She had always wanted to travel the world, but now, she is traveling between worlds. Who will she encounter along the way? Multiple crossovers: Fairy Tail. MHA, One Piece, and more.

How would Izuku's life be when he is the son of King the right hand man of Kaido. How would the world be when most of his life was on Wano. What happens when he is not just the son of King but also the grandson of Silvers Rayleigh. He also had found Gol D Rogers sword Ace. (Discontinued)

Luffy and his gang was celebrating. after the defeat of a Yonko pirate Kaido the strongest creature in the universe but something happens that sent Luffy and two others to my hero academia universe and now they will be facing a new enemy and old in that world