Jimmy Neutron (voice)
Hugh Neutron (voice)
Judy / Vox 2000 (voice)
Carl / Mr. Wheezer / Butch (voice)
Sheen (voice) (as Jeff Garcia)
Cindy Vortex (voice)
Libby (voice)
Ms. Fowl (voice)
Sam / Louie (voice)
Nick (voice)
Nick's Singing Voice (as Jeff Gun)
Goddard / Twonkies (voice)
Themselves (voice)
