Jimmy Neutron: Boy Genius

Frank Welker

As Goddard / Poultra (voice)

Rob Paulsen

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

Carolyn Lawrence

As Cindy Vortex (voice)

Crystal Scales

As Libby Folfax (voice)

Candi Milo

As Nick Dean / Britney / PJ (voice)

David L. Lander

As Yokian Guard / Gus (voice)

Carlos Alazraqui

As Mr. Estevez (voice)

Jim Cummings

As Ultra Lord / Mission Control / General Bob (voice)

Keith Alcorn

As Bobby / Kid / Control Yokian (voice)

Kimberly Brooks

As Zachary / Reporter / Angie / Libby's Mom (voice)

Andrea Martin

As Ms. Winfred Fowl (voice)

Billy West

As Bobby's Twin Brother (voice) / Butch (voice) / Jailbreak Cop (voice) / Old Man Johnson (voice) / Robobarber (voice) / Flurp Announcer (voice) / Yokian Officer (voice) / Anchor Boy (voice) / Guard (voice)

Mary Hart

As Yokian Newscaster #2 (voice)

Bob Goen

As Yokian Newscaster #1 (voice)

Dee Bradley Baker

As Norad Officer (voice)

Laraine Newman

As Hostess (voice)

John A. Davis

As Octapuke Kid / Guard / Bennie (voice)

Paul Greenberg

As Guard (voice)

Mark Menza

As Yokian Incubator Operator (voice)

Jeannie Elias

As Little Girl / Camera Person (voice)

Michael Hagiwara

As Chris (voice)

Richard Allen

As Digital Voice (voice)

Brian Capshaw

As Screamer (voice)

Cheryl Ray

As Screamer (voice)

Matthew Russell

As Hyperactive Kid / Arena Yokian (voice)