Sylvester and Tweety

Sylvester and Tweety was one of several games based on Warner Brother cartoons by Sunsoft. It eventually met its end when Sunsoft went bankrupt in early 1995. Acclaim bought the rights to distribute some of their games (like Porky Pig's Haunted Holiday), but this game perhaps was not in good enough shape for them to consider releasing.

Sylvester and Tweety was in development by Visual Concepts by October 1993, as indicated by this short demo (which dates to October 11, 1993). This demo consists of one short scene with Sylvester and Tweety roaming around the room, and another demonstration of the character art. If you don't want to bother with the rom, here is what it looks like: