- Asner, Ed - Sergeant Mike Cosgrove@ (4)
- Bennett, Jeff - Lord Bravery, Cave Guy, Jeepers, The Huntsman, Candle Jack@ (2)
- Burton, Corey - Invisibo, Additional Voices@ (19)
- Cummings, Jim - Additional Voices@ (6)
- Curry, Tim - Dr. Mystico@ (3)
- Dini, Paul - Writer@ (5)
- Freberg, Stan - Mo-Ron, Bo-Ron@ (18)
- Gilbert, Ed - Professor Heiney@ (0)
- Harris, Jonathan - Professor Jones@ (5)
- LaMarche, Maurice - Longhorn, Additional Voices@ (4)
- MacNeille, Tress - Debbie Douglas, Cobra Queen, Additional Voices@ (4)
- Messick, Don - Additional Voices@ (2)
- Moll, Richard - Vorn The Unspeakable@ (2)
- Paulsen, Rob - Additional Voices@ (4)
- Rugg, Paul - Freakazoid, Additional Voices, Writer, Story Editor@ (8)
- Spielberg, Steven - Executive Producer@ (8)
- Welker, Frank - Mr. Chubbikins, Additional Voices@ (3)
