Jimmy takes a journey to a far-off comet called Twonkus 3 and some adorable alien creatures called Twonkies follow him back to Earth in his sand samples. Carl gives them away as pets, despite Jimmy's warnings. When Jimmy finds out the Twonkies become dangerous monsters when exposed to music, he and his friends must round them up and send them back to space before it's too late.
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Cast
Debi Derryberry
Jimmy Neutron (voice)
Mark DeCarlo
Hugh Neutron (voice)
Megan Cavanagh
Judy / Vox 2000 (voice)
Rob Paulsen
Carl / Mr. Wheezer / Butch (voice)
Jeffrey Garcia
Sheen (voice) (as Jeff Garcia)
Carolyn Lawrence
Cindy Vortex (voice)
Crystal Scales
Libby (voice)
Andrea Martin
Ms. Fowl (voice)
Billy West
Sam / Louie (voice)
Candi Milo
Nick (voice)
Jeffrey M. Gunn
Nick's Singing Voice (as Jeff Gun)
Frank Welker
Goddard / Twonkies (voice)
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