Sonic/Horton Hears A Who

Cast

 * Knuckles as Horton
 * Sonic as The Mayor of Whoville
 * Amy as Sally
 * Cosmo as Katie
 * Tails as Jojo
 * Various robots as Monkeys
 * Big the Cat as King Monkey
 * Rouge as Kangaroo
 * Silver as Rudy
 * Cream as Mrs. Quilligan
 * Charmy as Tommy
 * Cheese as Morton
 * Dr. Eggman as Vlad
 * Princess Sally Acorn as Helen