For R3p's request, I made a suggesting list of what icons would there be for each character, for an amount of wins.

Everyone start out as a Norm Turtle

Jazz
15 wins - Lizard
45 wins - Dragon
90 wins - Rapier
150 wins - Sparks
250 wins - Hatter
325 wins - Tuf Turt
400 wins - Bolly
500 wins - Devil Devan

Spaz
15 wins - Helmut
45 wins - Bat
90 wins - Raven
150 wins - Demon
250 wins - Monkey
325 wins - Sucker
400 wins - Bubba
500 wins - Bilsy

If there's something for Lori of TSF, then I'd go this way

15 wins - Labrat
45 wins - Dragon Fly
90 wins - (Secret) Blue Ghost
150 wins - Floating Sucker(?)
250 wins - Addon DOG
325 wins - Witch
400 wins - Rocket Turtle
500 wins - Queen