A 2-legged predatory dinosaur, but usually smaller than large bipeds
During Portal Runner, a raptor egg was kidnapped from the Prehistoric World and taken to the Plastic World, which hatched in the hands of Vikki Grimm on Green Base 1. No one ever cared about this or wondered what became of it, which which ended up becoming a disaster. Apparently this raptor got a mate, possibly another smuggled raptor, or these dinosaurs can reproduce on their own.