The oldest of all the ancestors, the Prehistoric Devil was the ancestor to the Tasmanian Devil. He is a caveman in prehistoric times, as well as the only caveman alive. Being a caveman he had not much knowledge of anything. The Old Devil had many hobbies, including eating everything in sight, causing stampedes, and eating the stampedes he's caused. He has a much different physical appearance than Taz. His brown color is more darkish, wears lion clothes, has a moncle, has a mustache, and is sometimes seen with a club. He still acts like his descendant. He likes to do his spin movement, is wild, and has an apatite for just about anything.