 His role is similar to Spike in cartoons such as "The Bodyguard" (1944), "Fit To Be Tied" (1952), and "Much Ado About Mousing" (1964), which is to defend Jerry against Tom.He is presumably the oldest son of Spike before Tyke, and this could be identified by his looks and personality that is similar to his father Spike.Unlike Spike and Tyke he has a big bite (similar to those of "Looney Tunes" Tasmanian Devil).