Debi Derryberry
Jimmy Neutron (voice)
Acting
Mark DeCarlo
Hugh Neutron (voice)
Acting
Megan Cavanagh
Judy / Vox 2000 (voice)
Acting
Rob Paulsen
Carl / Mr. Wheezer / Butch (voice)
Acting
Jeffrey Garcia
Sheen (voice) (as Jeff Garcia)
Acting
Carolyn Lawrence
Cindy Vortex (voice)
Acting
Crystal Scales
Libby (voice)
Acting
Andrea Martin
Ms. Fowl (voice)
Acting
Billy West
Sam / Louie (voice)
Acting
Candi Milo
Nick (voice)
Acting
Jeffrey M. Gunn
Nick's Singing Voice (as Jeff Gun)
Acting
Frank Welker
Goddard / Twonkies (voice)
Acting
Graystar
Themselves (voice)
Acting