They could be from anything. Dragonball Series, Capcom Games, Nintendo, Sony, Naruto, Marvel, DC, and the list goes on. You choose who you think is the most powerful and post why. Don't be a fan-boy and put down someone just because.... it would be nice to know who this could be!!!
All right well let's change it then. It's good to know that TOAA MoM and The Presence are all top tier when it comes to most powerful fictional characters, but let's forget anyone of the Judeo-Christian all powerful gods and go to lower tiers. So as of now anyone who has less power than those are open for question and conversation. Remember that all video game characters, anime characters, comic book characters, and cartoon characters are allowed to be discussed.