Wincat Alcala Director Keith Alcorn Director Mike Gasaway Director Butch Hartman Director, Executive Producer Debi Derryberry Jimmy Neutron Voice Tara Strong Timmy Turner Voice Susan Blakeslee Wanda, Mrs. Turner Voice Megan Cavanagh Judy Neutron Voice Mark DeCarlo Hugh Neutron Voice Jeff Garcia Sheen Voice Jeff Garlin Villain Voice Carolyn Lawrence Cindy Vortex Voice Jay Leno Nega-Chin Voice Daran Norris Cosmo , Mr. Turner Voice Rob Paulsen Carl Voice Crystal Scales Libby Folfax Voice Billy West Sam Voice Steve Oedekerk Executive Producer Charlie Brissette Original Music Joe E. Elwood Film Editing