Carlos Alazraqui

as Rocko / Spunky / Leon Chameleon / Gordon the Foot / Mitch / Bun Master (voice)

Tom Kenny

as Heffer Wolfe / Chuck Chameleon / Really Really Big Man / Papa Elf / Newscaster / Captain Compost Heap / Salesman / Winds of Change / Tom / Tree (voice)

Charlie Adler

as Ed Bighead / Bev Bighead / Mr. Dupette / Grandpa Wolfe / Mr. Fathead / Mrs. Fathead / Dead Napoleon (voice)

Mr. Lawrence

as Filburt / Maitre D' / Martian 1 / Doug / Hopping Hessian / Doodleberg / Lizard (voice)

Jill Talley

as Nosey / Rabbit Mama / Schlam-O Girl / Teacher / Elephant Lady (voice)

Linda Wallem

as Dr. Hutchinson / Aunt Gretchen / Female Giraffe (voice)

Steve Little

as Nineman / Construction Worker / Cowboy / Ox / Worm B (voice)

Joe Murray

as Ralph Bighead / Rachel Bighead (voice)