The Sharingans Tsukuyomi is a powerful tool, able to reach the very soul. When Sasuke wakes up the day after his brother killed his entire family, it is with the memories of another life in his head. (Saitama is reborn as Uchiha Sasuke, making the world a very different place.) (Slash, AU, Crossover)

When the Dursleys die in a car crash, Dumbledore is left with a quandary as to where to place the Boy-Who-Lived. That is, until he remembers another relative of Lily's: a cousin in Japan. Rated M just be safe.

Saitama is suddenly swept away to the world of One-piece. The beginning of a new adventure? Surely; Enemies that don't die in one punch?...Not really.

In the world of My Hero Academia, lives the caped baldy known as Saitama. He lives in the world of My Hero Academia as he goes through life full of superhuman beings gifted with abilities known as quirks. The world however does not know his true potential, how will Saitama reveal to the world his true strength?

AU where Izuku isn't trained by the one with "One For All", but an old bald man who only needed "One Punch For All" the enemies he had ever encountered. "Know this, The Strongest Hero isn't necessarily The Strongest Man. The farther you get from the people you want to save, the harder it is to save their spirits."

When our favorite caped baldy suddenly gets transported to the world of Imperial arms and a corrupt empire, a serious twist of events lead to him joining the most feared assassin group of the land: Night Raid.

Saitama is the world's strongest being, able to defeat any and all threats, no matter how powerful. But what happens when he becomes the threat?

Saitama finds himself in a strange land where there are monsters that roam alongside humans and don't attack them. Strange first sight sure, but atleast they aren't harming anyone. So no need to intervene. There is one problem though. He has to take care of one. Now he has two mouths to feed and take care of. Well.. it shouldn't be problem for a poor hero...wait a second it will

You think your Dragonborn is so overpowered that the quests of Skyrim become boring? You think no one in Skyrim properly acknowledge your mighty deeds that save the world? Then I guess you can understand a bit about how Saitama feels as the Dragonborn... or not. As an inevitable result, this Elder Scrolls story with One Punch Man characters is AU... Very AU.

When Sitama finds himself in another world filled with more people like Sonic who seem to find it amusing to challenge him to pointless fights he decides he wants to lay as low as possible. And yes Genos is there and following him around like a cyborg puppy. Sonic just wants to win ;-;

In the ruined crater that once held the Forever Fall, forces beyond Remnant's comprehension are stirring. Well, maybe more strolling around looking for Udon and the way home than stirring but that's beside the point; a bald justice has emerged into Remnant with his sidekick, seeking justice and defending the weak. After they fix the moon first that is.

A poorly utilized Quirk followed by a borderline cliché misunderstanding brings All Might into the One Punch Man world and straight into a fight with the strongest foe he's ever fought.

After a strange incident in Y-City, Saitama is thrown in a strange land where everyone has superpowers, join him as he tries to settle down in this new land where lethal force on 'monsters' or anything for that matter is a big no-no.

When saitama fought boros he was sent into a different universe to a world full of aspiring heros

Rin summoned definitely not Shiro. And whole Holy Grail War become broken… Translated from Russian.

Saitama and Genos found a letter that came from nowhere and suddenly they teleported to a world with a cosplay bunny girl and people with super powers. Will Saitama and Genos be able to get along with these superhuman people?

The Tournament of Power is the deciding factor of all the participating universes' survival. Beerus decides to take matter in his own hands. While Goku searches for members for the Tournament, the God goes hunting as well. How will he react when he comes across a certain caped baldy who is a hero for fun?

When Saitama suddenly ends up outside of Wall Rose, he quickly becomes humanities' savior. With no way of getting home, he accepts his role... kind of.

Saitama finds himself in a strange land where there are monsters that roam alongside humans and don't attack them. Strange first sight sure, but atleast they aren't harming anyone. So no need to intervine. There is one problem though. He has to take care of one. Now he has two mouths to feed and take care of. Well.. it shouldn't be problem for a poor hero...wait a second it will

Lex Luthor is having a very bad day, and the Justice League Universe will never be the same.

Soshi Uzumaki-Namikaze-Niji was born without a chakra network or system and because of it wasn't for used the kyuubi sealing but his sisters were. He was neglected by his mothers for his sisters for 5 years but he has become super strong from a simple training regime. Now Soshi seeks a true opponent to go all out against and becomes a ninja to find that worthy challenge.

The hero known as Saitama lands in the middle of Westeros, specifically during the march to Winterfell. However, he will make his own journey through the corrupt land itself... how does he fare? Will he find the local market?