Cast[]
Part I[]
- Timmy Turner as Jimmy Neutron
- Cat Valentine as Carl Wheezer
- Carly Shay as Sheen Estevez
- May as Cindy Vortex
- Dawn as Libby Folfax
- Pan as Goddard
- Maria Robotnik as Judy Neutron
- Dr. Eggman as Hugh Neutron
- Silica Terrell Keasler/Serena Taylor Keasler Tunestool (Georgia World) and Silica Terrell Keasler/Serena Taylor Keasler Tunestool (South Carolina World) as Timmy Turner
- Sakura Haruno as Cosmo Cosma
- Hinata Hyūga as Wanda Fairywinkle-Cosma
- Ashlye Meyer and Valerie Rose Lohman as Trixie Tang
- Rosie O'Donnell and Susan Grace as Denzel Crocker
- Myra McWethy and Jen Kwok as Jorgen Von Strangle
- Nathan Kress and Shyloh Oostwald as Chester McBadbat
- Noah Munck and Shanley Caswell as A.J.
- Bowser as Mr. Turner
- Shadow Queen as Mrs. Turner
- Alexa Nikolas and Carly Bondar as Vicky The Babysitter
- Shirley as Professor Calamitous
- Denzel Crocker as Shirley
Part II[]
- Cat Valentine as Carly Shay
- Jade West as Sam Puckett
- Robbie Shapiro as Freddie Benson
- André Harris as Gibby Gibson
- Beck Oliver as Spencer Shay
- Pan as Tori Vega
- Marron as Jade West
- Bulla as Cat Valentine
- Leena as Trina Vega
- Uub as André Harris
- Gohan as Robbie Shapiro
- Giru as Rex
- Goten as Beck Oliver
- Master Roshi as Erwin Sikowitz
- Arale Norimaki as Kenan Thompson
- Freddie Benson as Steven Carson