 In his first appearance, "Dog Trouble", Spike is the main antagonist, chasing and attacking both Tom and Jerry on sight, even trying to eat Jerry, which forced the two to work together to defeat him.However, in his next appearance "The Bodyguard", after Jerry willingly saved him from being poached, he became Jerry's protector whenever needed.In all subsequent shorts, Spike becomes typecast as the stereotypical dumb brute who is always duped into becoming a shield for Jerry from Tom.