Spike Bulldog is the deuteragonist of the Tom and Jerry franchise. He is a gray, rough bulldog that appears in many of Tom and Jerry cartoons. He has a somewhat minor friendship with Jerry Mouse and is a formidable enemy to Tom Cat, though he is occasionally a rival to both protagonists, as he was in the short Dog Trouble.
He is one of the two protagonists of his short lived series called Spike and Tyke.