John Brown / Inspector Gadget / Robo Gadget
Sanford Scolex / Dr. Claw
Brenda / Robobrenda
Penny
Kramer
Mayor Wilson
Sikes
Chief Quimby
Gadgetmobile (voice)
Artemus Bradford
Thelma
Himself
Famous Big Guy with Silver Teeth
Famous Villain with Deadly Hat
Famous Identifier of Sea Planes
Famous Native American Sidekick
Famous Assistant to Dr. Frankensomething
Son Before Second Son
Bane of the Bumbling / Robobrendaerobics Group Member
Aaron Meyerson
Out of Control Bus Driver
Fantastic Doctor
Mayor's Sychophantic Assistant
Sore Guru
Wet, Green Businessman
Hot Dog Vendor
Assistant Car Thief
Period Photographer
Snoopy News Anchor
Showgirl
Mr. D.I.C. - Party Guest
Brain (voice)
Police Officer (uncredited)