Carlos Alazraqui
Rocko / Spunky / Leon Chameleon / Gordon the Foot / Mitch / Bun Master (voice)
Tom Kenny
Heffer Wolfe / Chuck Chameleon / Really Really Big Man / Papa Elf / Newscaster / Captain Compost Heap / Salesman / Winds of Change / Tom / Tree (voice)
Charlie Adler
Ed Bighead / Bev Bighead / Mr. Dupette / Grandpa Wolfe / Mr. Fathead / Mrs. Fathead / Dead Napoleon (voice)
Mr. Lawrence
Filburt / Maitre D' / Martian 1 / Doug / Hopping Hessian / Doodleberg / Lizard (voice)
Jill Talley
Nosey / Rabbit Mama / Schlam-O Girl / Teacher / Elephant Lady (voice)
Linda Wallem
Dr. Hutchinson / Aunt Gretchen / Female Giraffe (voice)
Steve Little
Nineman / Construction Worker / Cowboy / Ox / Worm B (voice)
Joe Murray
Ralph Bighead / Rachel Bighead (voice)
Cosmo Segurson
Pillow Salesman / Martian 2 / VHS Tape / Inured Worm / TV Announcer 1 / Russian Hockey Player (voice)
Tom Smith
Really Really Big Man - Movie / VCR (voice)
Dan Becker
Rabbit Dad (voice)