From imdb:
LeVar Burton .... Kwame (voice)
Whoopi Goldberg .... Gaia (voice)
Mary Kay Bergman .... Dr. Blight (1991-1993) (voice)
James Coburn .... Looten Plunder (1990-1993) (voice)
Tim Curry .... MAL (1990-1993) (voice)
Jeff Goldblum .... Duke Nukem (1990) (voice)
Louis Gossett Jr. .... Commander Clash
Helen Hunt .... Additional Voices (voice)
Margot Kidder .... Gaia (1993-1996) (voice)
Malcolm McDowell .... Zarm (1990-1993) (voice)
John Ratzenberger .... Rigger (1990-1993) (voice)
Meg Ryan .... Dr. Blight (1990-1991) (voice)
Martin Sheen .... Sly Sludge (1990-1993) (voice)
Sting .... Zarm (1990-1992) (voice)
And finally...
Charlie Schlatter .... Additional Voices (voice)
... who played Ferris Bueller in the TV series, was a 'Mahoney' substitute in Police Academy 7: Mission to Moscow and starred alongside Dick Van Dyke in Diagnosis Murder.
EDIT:
... and Sonic the Hedgehog the animated series, of course.