Heavy D appeared in several TV shows, most notably - 'Roc', 'The Tracy Morgan Show', and 'Boston Public' as members of the Toobworld citizenry. But he also appeared as himself in two series set in Earth Prime-Time and one in the Tooniverse:
'The Fresh Prince of Bel-Air'
Someday Your Prince Will Be in Effect: Part 2 (1990)
'A Different World'
Delusions of Daddyhood (1989)
Botzwana Aki and the Hydrant of Doom (1996)
I'm sorry it was his death which got him into the Hall.