Genos from One Punch Man himself would be great. He could be the one who tries to explain Saitama's power to the characters from the other crossover universe. For example, in a crossover with Attack on Titan, Genos could be the one to tell the Survey Corps about Saitama's invincibility as they face the Titans.
King could be a fun addition. In a crossover with Sword Art Online, King could be mistaken for a high - level player because of his reputation in the One Punch Man world. But in reality, he's just his normal self, and the SAO characters would gradually realize that there's more to him than meets the eye.
Well, first off, Captain America. His sense of honor and leadership could be a great influence on Spider - Man. Then there's Doctor Strange. He could introduce Spider - Man to the magical side of the Marvel universe. And of course, Deadpool. His wacky and unpredictable nature would add a lot of humor to the crossover. He and Spider - Man could have some hilarious banter while fighting bad guys.
Definitely Daredevil. As I mentioned before, their different moral compasses would create great tension. Elektra could also be included. She has a more ambiguous moral code and her skills would make her a formidable presence in a story with the Punisher.
A tough and experienced park ranger. They would have knowledge of handling dangerous animals and could be a key figure in trying to deal with the Indoraptor in a crossover situation. For instance, if the crossover is in a forest - like setting, the ranger could use their tracking skills.
The Terraria Guide could be a great character to include. He has a lot of knowledge about the Terraria world, so in a crossover, he could be the one trying to figure out the new world they're in. For example, if it's a crossover with Terraria and Hollow Knight, he could study the strange bugs and lore of the Hollow Knight world.
Luke Cage would also be a great addition. His unbreakable skin and street - smart attitude could bring a new dimension to the story. He could act as a moral compass for The Punisher at times, while also respecting his determination to clean up the streets.
If we consider a crossover with the Lord of the Rings universe, Aragorn could be a good fit. He's a noble leader and a skilled warrior. His presence could force the Boys to reevaluate their ideas about power and leadership, and he could also be a strong ally against any corrupted power - hungry characters from the Boys' world.
If it's a crossover with Teen Wolf, Stiles would be a great character to include. His quick thinking and sarcastic nature would contrast well with the more serious Shadowhunters. He could also provide some unique insights into solving problems, especially when it comes to the werewolf aspects of the Teen Wolf world that the Shadowhunters might not be as familiar with.
Well, Naruto's shadow clone jutsu could be really useful in a fight alongside Saitama. The clones could distract enemies while Saitama gets in a powerful punch. And Saitama's super strength could help Naruto in situations where brute force is needed more than ninjutsu. For example, if they had to break through a really thick and magically reinforced wall.
Definitely Saitama. He's the main character and his nonchalant attitude towards his incredible power is always interesting to explore in fanfiction. Also, Genos. His loyalty to Saitama and his own journey to become stronger make him a great addition.
If it's a crossover with Metroid, Samus could be a great addition. She has her powerful suit and weapons, and her serious, lone - wolf attitude would contrast with the more innocent and determined protagonist of Cave Story. They could team up to fight a common enemy that is threatening both their worlds, like a race of bio - mechanical creatures.