An enemy whose name is derived specifically from its attack pattern: it hops from side to side. They basically consist of a head and two large, powerful legs that allow them to make great strides through the air. Sidehoppers can be found in the confusing rooms of Kraid, and can be quite a nuisance due to their random and unpredictable nature. Sidehoppers also are able to defy gravity and jump upside-down on the ceiling.