Sonic the Hedgehog

Knothole Freedom Fighters
Chaotix Crew
 * Sonic the Hedgehog
 * Miles "Tails" Prower
 * Princess Sally Acorn
 * Bunnie Rabbot
 * Antoine Depardieu
 * Rotor the Walrus
 * Knuckles the Echidna
 * Nicole
 * Dulcy the Dragon
 * Vector the Crocodile
 * Mighty the Armadillo
 * Espio the Chameleon
 * Charmy Bee

Recurring
Team Dark
 * King Acorn
 * Sir Charles Hedgehog
 * Lupe
 * Shadow the Hedgehog
 * Rouge the Bat
 * E-123 Omega

Villains
Season 2
 * Dr. Julian Ivo "Eggman" Robotnik
 * Cluck
 * Scratch
 * Grounder
 * Coconuts
 * SWATbots
 * Fang the Sniper
 * Metal Sonic
 * Super Sonic

Heroes

 * Amy Rose
 * Cream the Rabbit and Cheese
 * Big the Cat and Froggy
 * Johnny Lightfoot
 * Porker Lewis
 * Chip
 * Blaze the Cat
 * Sticks the Badger
 * Ray the Flying Squirrel
 * Shorty the Squirrel/Shortfuse the Cybernik
 * Tekno the Canary

Villains
Season 3
 * Snively Robotnik
 * Grimer Wormtongue
 * Orbot and Cubot

Heroes

 * Sonia the Hedgehog
 * Manic the Hedgehog

Villains
Season 4
 * Sleet
 * Dingo

Hero(es)

 * Chris Thorndyke

Antiheroes

 * Chaos
 * Emerl