Terrorpin is a large, four-wheel drive dome-shaped robot which was painted green and designed to resemble a turtle. The outer shell could be raised and lowered in order to prevent robots from getting underneath it, and the robot’s weapon was a pneumatic ram with a spike tip shaped like a turtle’s head. Unusually, Terrorpin also featured a whoopee cushion which allowed the machine to produce strange noises, which was demonstrated before its Series 3 battle with Invertabrat.