• Yakko Warner as Inspector Gadget
  • Squit as Gadgetmobile
  • Hello Nurse as G2
  • Dot Warner as Penny (Animated Version)
  • Babs Bunny (From Tiny Toon Adventures) as Penny (IG1 Version)
  • Fifi La Fume (From Tiny Toon Adventures) as Penny (IG2 Version)
  • Dr. Otto ScratchNSniff as Brain
  • Flavio Hippo as The Chef
  • Walter Wolf as Dr Claw
  • Buttons as Mad Cat
  • The Brain as Scolex
  • Snowball as Professor Kramer
  • Montana Max (From Tiny Toon Adventures) as Sikes
  • Wakko Warner as the Kid
  • Bobby as the Reporter
  • Axl Gator (From Taz-Mania) as Brick
  • Bull Gator (From Taz-Mania) as Bekevor
  • Sid the Squid as Jungle Bob
  • Beanie the Brain-Dead Bison as the Ninja

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