Dan Castellaneta

Earthworm Jim (voice)

Jeff Bennett

Peter Puppy / Narrator (voice)

Jim Cummings

Psy-Crow / Bob the Killer Goldfish (voice)

Kath Soucie

Princess What's-Her-Name (voice)

Charlie Adler

Professor Monkey-for-a-Head (voice)

Edward Hibbert

Evil the Cat (voice)

Andrea Martin

Queen Slug-for-a-Butt (voice)

John Kassir

Snott / Henchrat (voice)

Ben Stein

Dr. Houston (voice)

Brad Garrett

The Lord of Nightmares (voice)