Besides Jeopardy!, Alex Trebek worked on To Tell The Truth from late 80's to 1991. The theme song is sung by The Cowsills.
And from the Smurfs, Pama Smurf!
From Garfield and Friends, Garfield the Cat!
From Adventures of Sonic the Hedgehog, Sonic.
From Disney's Raw Toonage, Marsupilami and Maurice