Serious answers
Zorro
Ben 10
Neo or Agent Smith from The Matrix
The Joker
Willy Wonka from Charlie and The Chocolate Factory, a devious trap zoner who mutates and mutilates enemies in cartoony ways and takes advantage of the flaws in their gameplan and personality.
The Alien from Alien, but not Predator because he's boring
Yakko, Wakko, and Dot
Grimm, Billy, and Mandy
John Cena (They put DBZ shaggy and a basketballer in the game, he's been in Scooby Doo before and WWE chars have been in real fighting games, shit sports sims, and Brawlhalla before)
Ed, Edd, n Eddy
Silly answers
Steve Urkel
Scrappy Doo
any animal from Cats Don't Dance
Coconut Fred
Ace Bunny
Bill Murray
Buzz and Scuzz
Bunny the retarded Powerpuff Girl