Jimmy Neutron / Alien Actress / Alien Woman (voice)
Carl Wheezer/Mr. Wheezer/Mrs. Wheezer/Test Pilot/Announcer (voice)
Sheen Estevez / Army Guard (voice)
Goddard (voice)
Cindy Vortex (voice)
Libby Folfax (voice)
Meldar Prime (voice)
April (voice)
Sr. Estevez (voice)
Gorlock #2 / Brain #1 (voice)
Judy Neutron / Mrs. Vortex (voice)
Brain #2 / Mayor Quadar (voice)
Hugh Neutron / Emergency System / Gen. Abercrombie (voice)
Meldar Prime (singing voice)
Bolbi Stroganofsky / British Tourist (voice)
Sam / Corky Shumatsu (voice)
Vendanna (voice)
