Midoriya would be a great candidate. He has a strong sense of determination and is always eager to learn. He would approach Pokemon training with the same enthusiasm he has for becoming a hero. He would study each Pokemon's strengths and weaknesses carefully and form strong bonds with his Pokemon through his kind and empathetic nature.
Maybe there's a villain in the Pokemon world who is using some kind of Pokemon - related power to cause chaos, similar to the villains in BNHA. The heroes from BNHA have to team up with local Pokemon trainers to stop this threat. They discover new Pokemon abilities that they can incorporate into their own fighting styles. For example, Todoroki could learn from ice - type Pokemon how to better control his ice powers.
One idea could be that the characters from Bnha are transported to the Warrior Cats world. For example, Deku could find himself in a Clan and have to learn the ways of the cats to survive. He might use his quirk in unique ways to help the Clan, like using One For All to jump really high to catch prey or to defend against other Clans.
In 'bnha kny crossover fanfiction', a prevalent theme is the clash of cultures. The very different worlds of My Hero Academia, with its modern superhero society, and Demon Slayer, which is set in a more historical - fantasy Japan, create interesting scenarios. There's also the theme of adaptation. Characters from one universe have to adapt to the rules and norms of the other. For instance, heroes having to deal with the existence of demons, or demon slayers trying to understand the concept of quirks. Additionally, friendship and cooperation across the two universes is often explored as a theme.
One idea could be to have the characters from BNHA attend the Death Weapon Meister Academy in the Soul Eater universe. They could learn about soul resonance and how to handle weapons in a whole new way. For example, Deku could be paired with a unique weapon and struggle to master the new techniques.
Next, when writing the crossover, focus on how the characters would react to the new environment. If Bakugo were to enter the Soul Eater world, he'd probably be very frustrated at first with all the new rules. You should also make sure to balance the elements from both series. Don't over - emphasize one over the other. For example, give equal importance to the development of BNHA - style quirks and Soul Eater - style soul abilities.
A Tsunade crossover in BNHA fanfiction could involve her being from a different world but getting involved in the BNHA universe's affairs. She might end up in a fight against some of the villains. Given her short temper, she could be quite a force to be reckoned with. She could also form alliances with some of the heroes like All Might, sharing her knowledge of combat and medicine.
Tsunade could interact with Midoriya Izuku. Izuku is always eager to learn new things and improve his skills. Tsunade could see his determination and potential, and she might teach him some of her combat and medical knowledge. Maybe she would help him control his quirk better or give him some physical training tips.
One popular trope is the 'transfer student' where a character from another series enrolls in U.A. High. For example, a character from Naruto might show up with their unique abilities, creating interesting interactions with the BNHA characters. Another is the 'power swap' trope, where BNHA characters get the powers of characters from a different universe and have to adapt. And the 'alternate universe' trope is also common, like a world where heroes and villains have different alignments or the BNHA world has a different social structure due to the influence of another fictional world.
One interesting concept could be the combination of different powers. For example, Elsa's ice powers in the 'Frozen' universe interacting with the Quirks in 'BNHA'. Maybe characters from 'BNHA' could learn to control ice in new ways from Elsa, or Elsa could gain a Quirk-like ability in the crossover.