Alien werewolves from the Moon attack Earth and steal all the cheese. It's up to Mandy, Grim, Billy, and Sperg to stop the alien ploy.
Grey DeLisle
as Mandy / Castigator (voice)
Greg Eagles
as Grim / Sperg (voice)
Richard Steven Horvitz
as Billy / Billy's Dad (voice)
Vanessa Marshall
as Irwin / Mouse (voice)
Dee Bradley Baker
as Alien Moonbeast / Alien Werewolf / Moonthing (voice)
Jeff Bennett
as Alien #1 / Rat (voice)
Chris Cox
as Meadowberry / Corporal / Postal Slob (voice)
Jennifer Hale
as Billy's Mom / Stinky (voice)
Tom Kenny
as Dr. Brainiac / Alien Pilot / Wiggly / Waiter (voice)
Mr. Lawrence
as Alien #2 (voice)
Julian Stone
as Sir Raven (voice)
