Complex sentence: Sylvester, who for the most part always played the antagonist role, ia featured playing the protagonist role in a couple of cartoons while having to deal with the canine duo of Spike the Bulldog and Chester the Terrier after being chased around.
Split into simpler sentences: Sylvester, who for the most part always played the antagonist role. A couple of cartoon features Sylvester playing the protagonist role while having to deal with the canine duo of Spike the Bulldog and Chester the Terrier after being chased around.