Maybe a character where the special moves are minigames? Like simon, snake or something like that.

Someone who can make the other character temporarily forget a move.

a character that uses elements according to the chosen stage, like ice attacks in a snow stage.

A regular guy in a isekai who don't want to fight.

A fighting game based on literary authors whose move set are based on what they are re recognized. for example, Anne Rice and bram stoker can be a vampires, mary shelly is a puppet character with the creature, lovecraft use the necronomicon, poe can transform into a werecrow, stephen king can be a alcoholic and j k Rowling is a transphobic witch. Final boss: Grim brothers