James Isaac 'Jimmy' Neutron (voice)
Jet Fusion (voice)
Beautiful Gorgeous (voice)
Commander Baker (voice)
Professor Calamitous (voice)
Professor Crank (voice)
Goddard (voice)
Carl Wheezer / Monk / Voice / Clam (voice)
Judy Neutron / Ms. Jingle Bells / Female Monk (voice)
Hugh Neutron (voice)
Sheen Estevez (voice)
Ms. Fowl (voice)
Cindy Vortex / Tina Sue (voice)
Libby Fallfax / Ike (voice)
Betty Quinlan (voice)
Narrator / Head Monk
Chief (voice)
