South Park, Fanboy & Chum Chum and Codename: Kids Next Door/Scooby Doo and The Alien Invaders

Cast

 * Chum Chum as Scooby Doo
 * Fanboy as Shaggy
 * Numbuh 5 as Velma
 * Stan Marsh as Fred
 * Wendy Testaburger as Daphne (Wendy Testaburger and Daphne are both Voiced By Mary Kay Bergman)
 * Henrietta Von Marzipan as Crystal (Henrietta Von Marzipan and Crystal are both Voiced By Candi Milo)
 * Yo as Amber
 * Sigmund The Sorcerer as Lester (Sigmund The Sorcerer and Lester are both Voiced By Jeff Glen Bennett)
 * Numbuh 86 as Dottie (Numbuh 86 and Dottie are both Voiced By Jennifer Hale)
 * Chad Dickson as Steve
 * Cree Lincoln as Laura
 * Boog as Max