Jimmy Neutron (voice)

Sheen Estevez (voice)

Carl Wheezer (voice)

61 eps

Cindy Vortex (voice) / Cindy Vortex / Tina Sue (voice) / Cindy Vortex / Phantom #2 (voice) / Cindy Vortex / Yuri (voice)

58 eps

Goddard / Special Vocal Effects (voice) / Goddard / Phantom #4 / Special Vocal Effects (voice) / Special Vocal Effects (voice) / Goddard / Tubbs / Special Vocal Effects (voice) / Goddard / Second Guard / Special Vocal Effects (voice) / Goddard / Tubbs / Father / Special Vocal Effects (voice) / Goddard / Tubbs / Health Inspector / Special Vocal Effects (voice) / Goddard / Wendel / Special Vocal Effects (voice) / Goddard / Mr. Wuggles / Special Vocal Effects (voice) / Tubbs / Special Vocal Effects (voice) / Goddard / Mr. Strych / Special Vocal Effects (voice)

57 eps

Hugh Neutron (voice) / Hugh Neutron / General / Alien Man / Emergency System / Gleason Like Creature (voice) / Hugh Neutron / Man (voice) / Hugh Neutron / Commercial Narrator (voice) / Hugh Neutron / Mr. Vortex (voice) / Hugh Neutron / Flippy (voice) / Hugh Neutron / Octopus Man (voice) / Hugh Neutron / Instructor (voice) / Hugh Neutron / TV Announcer (voice) / Hugh Neutron / Announcer (voice) / Hugh Neutron / Clerk (voice) / Hugh Neutron / Eddie / Newt / Gomer (voice) / Hugh Neutron / Jenson / Skeezicks (voice)

56 eps

Libby Folfax (voice) / Libby Folfax / Chuck (voice) / Libby Folfax / Ike (voice) / Libby Folfax / Maggie (voice) / Libby Folfax / Libby's Brother (voice) / Libby Folfax / Student #2 (voice) / Libby Folfax / Phantom #2 (voice) / Libby Folfax / Ozzie (voice) / Libby Folfax / Libby's Mom (voice) / Libby Folfax / Chicks (voice)

50 eps

Judy Neutron (voice) / Judy Neutron / Mrs. Vortex (voice) / Judy Neutron / Woman (voice) / Judy Neutron / Crowd Member #2 (voice) / Judy Neutron / Hilgo (voice) / Judy Neutron / Lunch Lady (voice) / Martian #2 (voice) / Judy Neutron / Mrs. Vortex / Aunt Suzy (voice) / Judy Neutron / Gretchen (voice) / Judy Neutron / Girl (voice) / Vox (voice) / Judy Neutron / Masseuse / MaternoTron (voice) / Judy Neutron / Old Lady Nusbaum (voice) / Judy Neutron / Vox (voice) / Judy Neutron / Phantom #3 (voice) / Judy Neutron / Mrs. Moran (voice) / Judy Neutron / Mrs. Pizza Monster (voice) / Mrs. Vortex / Vox (voice)