A third storyline could be that Harry gets involved in the Hero Association in the One Punch Man world. He might have to climb the ranks, just like the other heroes, and face various challenges along the way. He could use his knowledge from the wizarding world to come up with unique strategies to defeat villains, and at the same time, learn from the superhuman abilities of the heroes in this new world.
One possible storyline could be Harry arriving in the One Punch Man world and being mistaken for a new hero. He then has to prove himself while also trying to figure out how to get back to his own world.
Another storyline could be that Thanos, aware of One Punch Man's power, tries to use the Infinity Stones to either eliminate him or make him an ally. There could be a long - drawn - out battle where One Punch Man has to constantly dodge Thanos' attacks while trying to find a way to land his one punch. In the end, he manages to do it and saves the day.
One possible storyline could be that the original female character is a new hero in the One Punch Man universe. She teams up with Metal Bat on a mission. They start off not getting along well due to their different fighting styles. Metal Bat is more brute force while she might be more strategic. But as they face tougher and tougher enemies, they learn to combine their skills and eventually become good friends or even more.
Well, you can start by checking out some popular fanfiction websites like Archive of Our Own. Just search for 'Harry in One Punch Man' there, and you'll likely find a variety of fanfics. Some might focus on Harry being transported to the One Punch Man universe and having to adapt to its crazy power levels and unique characters.
I'm quite sure there exists a 'Naruto is One Punch Man' fanfic. The world of fanfiction is vast and full of all kinds of creative crossovers. Writers might be intrigued by the idea of bringing Naruto's ninja skills and the unique world of One Punch Man together. For example, how would Naruto react to the overpowered villains in One Punch Man's world? And how would Saitama view Naruto's determination to protect his village? These are the kind of things that could be explored in such a fanfic.
One unusual pairing in One Punch Man One Piece fanfiction could be Nami and Saitama. Nami might try to use Saitama's strength for her own gain, like getting treasure from really tough - to - reach places. It would be a fun dynamic with Nami's wits and Saitama's simplicity.
One popular storyline could be a robot becoming a disciple of Saitama. It tries to learn his power but struggles with the concept of 'one punch' strength as it's used to more complex combat algorithms. Another could be a robot villain created specifically to defeat Saitama, but in the end, it realizes the futility of fighting him and changes its ways. There are also storylines where robots team up with heroes to fight otherworldly threats, bringing their technological capabilities to the fight.
One possible storyline could be Deku somehow getting Saitama's power in the One Punch Man universe. He might struggle at first to control such overwhelming strength, like accidentally destroying things around him. Another could be a team - up between Deku and Saitama to fight a common enemy that is too powerful for either of them alone. For example, a villain who can absorb powers and is immune to most attacks.
One interesting storyline could be that your OC is from another dimension and has come to the One Punch Man world. They bring with them a different set of powers and values. This could lead to all sorts of clashes and also new alliances. Maybe they initially think the heroes in this world are too laid - back or too violent, and they try to change the way things are done. Or perhaps their power is something that is desperately needed in this world to fight a new and powerful enemy that the regular heroes can't handle on their own.
A common storyline involves a villainess falling for Saitama. Maybe a powerful female villain who was initially out to defeat Saitama realizes his charm and power in a different way. She then joins the harem and has to adjust to the other girls. This creates a lot of tension and humorous situations as the other members of the harem are suspicious of her motives at first.
Well, one common storyline could be about Saitama getting involved in various comical and heart - warming relationships within the harem. For example, different female characters might try to understand his overpowered yet simple - minded nature. Maybe a character like Tatsumaki could initially be frustrated by Saitama's nonchalance but gradually develop feelings. Another could be that Genos gets caught in the middle of all the harem chaos as he tries to protect Saitama from any potential harm caused by the female characters' over - enthusiastic advances.