• Debi Derryberry as Jimmy Neutron
  • Frank Welker as Goddard
  • Tara Strong as Timmy Turner and Baby Poof
  • Susanne Blakeslee as Wanda
  • Daran Norris as Cosmo
  • Russell Brand as E.B.
  • Rob Paulsen as Carl Wheezer
  • Jeffrey Garcia as Sheen Estevez
  • Carolyn Lawrence as Cindy Vortex
  • Crystal Scales as Libby Folfax
  • Jeremy Shada as Finn
  • John DiMaggio as Jake
  • Jerry Trainor as Dudley Puppy
  • Jerry Nelson as Gobo Fraggle
  • Steve Whitmire as Wembley Fraggle
  • Karen Prell as Red Fraggle
  • Kathryn Mullen as Mokey Fraggle
  • Dave Goelz as Boober Fraggle
  • Richard Hunt as Junior Gorg
  • Pierre Coffin, Chris Renaud and Jemaine Clement as The Minions
  • Phil Vischer as Jimmy Gourd, Mr. Lunt and Archibald Asparagus
  • Mike Nawrocki as Jean Claude Pea
  • Alanna Ubach as Manny Rivera/El Tigre
  • Grey DeLisle as Frida Suárez
  • Janice Kawaye as Jenny Wakeman
  • Chad Doreck as Brad Carbunkle
  • Audrey Wasilewski as Tucker Cornelius Carbunkle
  • Quinton Flynn as Sheldon Lee
  • E.G. Daily as Rudy Tabootie
  • Hynden Walch as Penny Sanchez
  • Candi Milo as Snap
  • Logan Grove as Gumball Watterson
  • Kwesi Boakye as Darwin Watterson

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