 Debi DerryberryJimmy Neutron (voice) | Jimmy Neutron (voice) |
 Tara StrongTimmy Turner (voice) | Timmy Turner (voice) |
 Megan CavanaghJudy Neutron (voice) | Judy Neutron (voice) |
 Mark DeCarloHugh Neutron (voice) | Hugh Neutron (voice) |
 Rob PaulsenCarl Wheezer / Announcer (voice) | Carl Wheezer / Announcer (voice) |
 Jeffrey GarciaSheen Estevez (voice) | Sheen Estevez (voice) |
 Carolyn LawrenceCindy Vortex (voice) | Cindy Vortex (voice) |
 Crystal ScalesLibby Folfax (voice) | Libby Folfax (voice) |
 Frank WelkerGoddard (voice) | Goddard (voice) |
 Susanne BlakesleeWanda (voice) | Wanda (voice) |
 Daran NorrisCosmo / Dad / Jorgen Von Strangle (voice) | Cosmo / Dad / Jorgen Von Strangle (voice) |
 Grey DeLisleVicky / Principal Waxelplax (voice) | Vicky / Principal Waxelplax (voice) |
 Carlos AlazraquiDenzel Crocker (voice) | Denzel Crocker (voice) |
 Dee Bradley BakerSanjay / Elmer / Fairy Agent #1 (voice) | Sanjay / Elmer / Fairy Agent #1 (voice) |
 Gary LeRoi GrayA.J. (voice) | A.J. (voice) |
| FFaith AbrahamsFrancis (voice) | Francis (voice) |
 Jim WardTour Guide (voice) | Tour Guide (voice) |
 Jason MarsdenChester McBadbat (voice) | Chester McBadbat (voice) |
