The Yolkians have come to earth, but this time they seek out only peace and brotherhood with the people of Retroville. While Jimmy Neutron suspects the worst, everyone in town is ready to forgive and forget. This special serves as a direct sequel to the Jimmy Neutron movie.
Debi Derryberry
as James Isaac 'Jimmy' Neutron / Nissa (voice)
Megan Cavanagh
as Judy Neutron / Vox (voice)
Mark DeCarlo
as Hugh Neutron / Yokian Waiter (voice)
Rob Paulsen
as Carl Wheezer / Principal Willoughby / Butch / Yokian (voice)
Jeffrey Garcia
as Sheen Estevez (voice)
Carolyn Lawrence
as Cindy Vortex (voice)
Crystal Scales
as Libby Fallfax (voice)
Andrea Martin
as Miss Fowl (voice)
Candi Milo
as Nick Dean / Woman #1 (voice)
Billy West
as Sam / Benny / Man #1 (voice)
S. Scott Bullock
as King Goobot / Yokian / Man #2 / Alarm (voice)
Paul Greenberg
as Ooblar / Yokian Waiter (voice)
