Thuggo (voiced by Brad Garrett in most appearances, understudied by Kurtwood Smith in four episodes) is the diabolical leader of a group of black-hooded skeleton-like Thuggosaurs. He is a Megalosaurus. His vanity insists he always look good, so Thuggo often spends more time trying to improve his appearance than accomplishing his evil plans - plans that would mean the end of the Living Dinosaurs once carried out.
Thuggo, voiced by Brad Garrett in most instances and understudied by Kurtwood Smith in four episodes, is the diabolical leader of a group of black-hooded skeleton-like Thuggosaurs. He is a Megalosaurus. His vanity drives him to spend more time enhancing his appearance than implementing his evil plans - plans that would result in the extinction of the Living Dinosaurs if executed.