Jimmy Neutron (voice)
Timmy (voice)
Villain (voice)
Carl / Eustace / Butler / Bucky McBadbat (voice)
Sheen (voice) (as Jeff Garcia)
Cindy / Mrs. Folfax / Libby's Mom (voice)
Libby (voice)
Hugh (voice)
Chester (voice)
A.J. (voice)
Wanda / Mom (voice)
Cosmo / Dad / Jorgen (voice)
Mr. Crocker (voice)
Blix / British Official / Sam / Corky Shimazu (voice)
Nega-Chin (voice)
Judy Neutron (voice)
Additional Voices (voice)