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.
Debi Derryberry
Mark DeCarlo
Megan Cavanagh
Rob Paulsen
Jeffrey Garcia
Carolyn Lawrence
Crystal Scales
Andrea Martin
Billy West
Candi Milo
Jeffrey M. Gunn
Frank Welker
Graystar