This article describes a custom creation, custom theme, or other fan material, made by a Brickipedia contributor. It has never been, is not, and will not be officially released.
The Earth Protobot is a custom BIONICLE designed by Bug.
Little is known about the Earth Protobot, but it is rumored to be extraterrestrial in origin. There were supposedly others, each with their own element, though they have not been encountered for quite some time. It is unknown if any of the Protobots were sentient.