Sonic/The Grim Adventures of Billy & Mandy

Cast

 * Sonic as Billy
 * Sally as Mandy
 * Dr. Eggman as Grim
 * Tails as Irwin
 * Sally's Dad as Harold
 * Sally's Mom as Gladys
 * King Acorn as Phillip
 * Queen Acorn as Claire
 * Sonic Jr. as Milkshake
 * Knuckles as Sperg
 * Rouge as Mrs. Butterbean
 * Shadow as Principal Goodvibes
 * Cream as Mindy
 * Amy as Eris
 * Nelson Thronyke as Dick
 * Lindsay Thronyke as Judy
 * Dr. Jullian Robotnik as Creeper
 * Vector as Hoss Delgado
 * Espio as Jeff
 * Charmy as Nergal Jr.
 * Wave as Grim's Mom
 * Jet as Grim's Dad
 * Metal Sonic as Billybot
 * Eggman Nega as Nergal
 * Chris Thronyke as Nigel Planter