South Park and Codename: Kids Next Door/Scooby Doo and The Alien Invaders

Cast

 * Numbuh 4 as Scooby Doo
 * Numbuh 2 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)
 * Numbuh 3 as Amber
 * Numbuh 1 as Lester
 * Eric Cartman as Steve
 * Shelly Marsh as Laura
 * Gregory Of Yardale as Max