Jimmy Neutron: Boy Genius

Debi Derryberry
James 'Jimmy' Isaac Neutron (voice)

Megan Cavanagh
Judy Neutron / VOX (voice)

Mark DeCarlo
Hugh Neutron / Pilot / Arena Guard (voice)

Jeffrey Garcia
Sheen Estevez (voice)

Patrick Stewart
King Goobot V (voice)

Martin Short
Ooblar (voice)

Frank Welker
Goddard / Poultra (voice)

Rob Paulsen
Carl Wheezer / Mr. and Mrs. Wheezer / Kid in Classroom (voice)

Carolyn Lawrence
Cindy Vortex (voice)

Crystal Scales
Libby Folfax (voice)

Candi Milo
Nick Dean / Britney / PJ (voice)

David L. Lander
Yokian Guard / Gus (voice)

Carlos Alazraqui
Mr. Estevez (voice)

Jim Cummings
Ultra Lord / Mission Control / General Bob (voice)

Kimberly Brooks
Zachary / Reporter / Angie / Libby's Mom (voice)

Andrea Martin
Ms. Winfred Fowl (voice)

Billy West
Bobby's Twin Brother (voice) / Butch (voice) / Jailbreak Cop (voice) / Old Man J...

Mary Hart
Yokian Newscaster #2 (voice)

Bob Goen
Yokian Newscaster #1 (voice)

Dee Bradley Baker
Norad Officer (voice)