The Adventures of Jimmy Neutron and Timmy Turner is an American computer-animated science fiction comedy fantasy crossover television series based on The Jimmy Timmy Power Hour.
- Debi Derryberry as Jimmy Neutron
- Tara Strong as Timmy Turner and Poof
- Rob Paulsen as Carl Wheezer
- Carolyn Lawrence as Cindy Vortex
- Jeffrey Garcia as Sheen Estevez
- Crystal Scales as Libby Folfax
- Frank Welker as Goddard
- Kari Wahlgren as Chloe Carmichael
- Maddie Taylor as Sparky
- Daran Norris as Cosmo, Mr. Turner, and Jorgen Von Strangle
- Susan Blakeslee as Wanda, and Mrs. Turner
- Jason Marsden as Chester McBadbat
- Grey Delisle as Vicky and Principal Waxelplax
- Mark DeCarlo as Hugh Neutron
- Megan Cavanagh as Judy Neutron
- Gary LeRoi Gray as A.J.
- Carlos Alazraqui as Mr. Crocker
- Tim Curry as Professor Calamitous
- Jeff Garlin as Shirley
- The Jimmy Neutron universe 3D animated by Bardel Entertainment.
- The Fairly OddParents universe 2D animated by Elliott Animation.
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