A Bully Dog resembles a large, purple dog with a massive head and an equally massive, toothed maw. Its ears are long, stand on end, and curl at the tips. It has a crooked, purple tail and four short legs with no discernible digits on its paws. Its long, pink tongue is often seen hanging out of its mouth. The Bully Dog's large, yellow eyes each sport a black spiral pattern. It also wears a large, yellow collar with several conical, silver spikes on it, though, because of the Heartless's size, it is worn around its waist instead of its neck. Its legs, the tip of its tail, and the tips of its ears are all orange. Its Heartless emblem is on its rear.