A Mad Bumper is meant to resemble a cartoonized version of real-world cars. Its body is primarily red, and its roof is black with orange flames and a bent, black antenna on its top. Its four black tires are set rather close together and have purple hubcaps, and its fenders are silver. The white grill of the car acts as the Heartless's sharp-toothed mouth. It also has two headlights with yellow tips that act as its "eyes", though it has actual, glowing yellow eyes set in its black windshield. Its Heartless emblem is actually its hood ornament.