Debi Derryberry
Jimmy Neutron (voice)
Jeffrey Garcia
Sheen Estevez (voice)
Rob Paulsen
Carl Wheezer (voice)
Carolyn Lawrence
Cindy Vortex (voice)
Frank Welker
Goddard / Special Vocal Effects (voice)
Mark DeCarlo
Hugh Neutron (voice)
Crystal Scales
Libby Folfax (voice)
Megan Cavanagh
Judy Neutron (voice)
Andrea Martin
Ms. Fowl (voice)
Candi Milo
Nick Dean (voice)
Billy West
Sam Melnick (voice)
Phil LaMarr
Bolbi (voice)
Jim Cummings
Ultra Lord (voice)
Tom Kenny
Nanobot #2 (voice)
Jeff Bennett
Travoltron/Barbarino (voice)
Corey Burton
Spamdini (voice)
Maurice LaMarche
Zix / Ticket Taker (voice)
Kath Soucie
Betty Quinlan (voice)
Tim Curry
Professor Calamitous (voice)
Grey DeLisle
Elke (voice)
Joe Lala
Mr. Estevez (voice)
Daran Norris
Nanobot #1 (voice)
Jim Belushi
Coach Gruber (voice)
Kevin Michael Richardson
Tee (voice)
Phyllis Diller
Granny Neutron (voice)
Michael Hagiwara
Master Hong / Ninja (voice)
Paul Greenberg
Brobot (voice)
James Sie
You Yee / Elderly Monk / Ninja (voice)
Peter Frampton
Hugh Neutron (singing voice)
Ming-Na Wen
Peggy Tsu (voice)
Tom Kane
Dean Cain (voice)
Wendie Malick
Beautiful Gorgeous (voice)
Christian Slater
Jet Fusion (voice)
Jim Meskimen
Quentin Smithee (voice)
Michael Clarke Duncan
Commander Baker (voice)
Ben Stein
Giggles the Clown (voice)
Mel Brooks
Santa Claus (voice)
Neil Ross
Announcer (voice)
John Kassir
Seymour / Student #3 (voice)
Tress MacNeille
Annabelle / Aunt Kari / Great Aunt Amanda (voice)
