"Mayhem reigns supreme in the animated kingdom as whiz kid Jimmy Neutron and Timmy from "The Fairly Oddparents" swap places in each other's worlds."
Debi Derryberry
as Jimmy Neutron (voice)
Tara Strong
as Timmy Turner (voice)
Megan Cavanagh
as Judy Neutron (voice)
Mark DeCarlo
as Hugh Neutron (voice)
Rob Paulsen
as Carl Wheezer / Announcer (voice)
Jeffrey Garcia
as Sheen Estevez (voice)
Carolyn Lawrence
as Cindy Vortex (voice)
Crystal Scales
as Libby Folfax (voice)
Frank Welker
as Goddard (voice)
Susanne Blakeslee
as Wanda (voice)
Daran Norris
as Cosmo / Dad / Jorgen Von Strangle (voice)
Grey DeLisle
as Vicky / Principal Waxelplax (voice)
Carlos Alazraqui
as Denzel Crocker (voice)
Dee Bradley Baker
as Sanjay / Elmer / Fairy Agent #1 (voice)
Gary LeRoi Gray
as A.J. (voice)
Faith Abrahams
as Francis (voice)
Jim Ward
as Tour Guide (voice)
Jason Marsden
as Chester McBadbat (voice)
Rico Hill
Story
Gene Grillo
Writer
Butch Hartman
Steve Marmel
John A. Davis
Original Concept
Keith Alcorn
Producer
Bob Boyle
Paul Marshal
Steve Oedekerk
Fred Seibert
Executive Producer
Jed Spingarn
Co-Executive Producer
Joe E. Elwood
Editor
John R. Carlson
Storyboard
Tom Grevera
Supervising Animator
Director
Guy Moon
Original Music Composer
Charlie Brissette