50 Kill One Hero » by ShockingShoes During childhood, Izuku Midoriya and Monkey D. Luffy became friends, and when Izuku begins to train his quirk, One for All, Luffy arrives yet again, showing Izuku just how different the Grand Line is from Japan. This story is a crossover between One Piece, My Hero Academia, and Kill La Kill. Updates erratically.

34 Void Millennium II: Lost World » by Sun Dancer 0880 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.

166 The Pirates' Savior » by Jdot.FightMe 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.

9 One Piece: My Hero's Voyage » by jayravel59 Izuku Midoriya dreamed of becoming the greatest Marine... not the most feared pirate. When a twist of fate launches him into the vast seas of the Grand Line, Deku must fight not just villains, but the call of the ocean itself. Armed with his hero's heart and surrounded by chaos, he sets sail on a voyage that will change history forever.

56 Bits of Who I Am » by The Samurai Prince Goma 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.

104 Milenio Vacío II: Viejo Mundo » by Sun Dancer 0880 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

189 Future Heroes in the Great Pirate Era » by CaesarDKing 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.

4 Tyrant King Heroes by MountainKing2401 After an accident at sea, a crew of pirates is sent to a world where nothing makes sense and are forced to attend a school for heroes. Stranded in a strange city, the only thing they can do is try their best to reach their goals and find a way home or die trying. (Crew w/ Canon and Non-Canon Characters) (No Pairings) (Reviews Wanted) (No Commissions)

85 A Silver Legacy » by KingofKings94 All it takes is one person to turn the world upside down. Let's watch as the most insane person decides to take U.A on the ride of their lives. (cover by Bundle of Sticks)

5 Old World » by islamov301 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.

1k+ Everyone Has Dreams » by hopefulheart108 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.

3 Goro Goro no Kaminari » by Andrewisno1 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.

22 The Otherworld Pirates » by AzureWriter83 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.