Megatank is a giant, tank-like machine, hence the name. It has four eyes, each in a different color (blue, green, yellow, and red). It only opens one eye at a time, opening each only as they are progressively destroyed (i.e., it opens the green eye once the blue one is destroyed, the yellow once the green is destroyed, etc.). It has a conveyor belt on the front, on which buttons and cannons move along. It has three smokestacks on the back, and a toothy grin painted on the side.