B-1 (Len Carlson in seasons 1-2, Dwayne Hill in Mission: Earth), X-5's "uncle", is an older model robot formerly in service with the Galactic Guardians; in later episodes he is implied to be one of its founding members. He was discarded on the planet Crushton when he became obsolete. Since then he's led a robot militia against anyone who tries to profit from the planet's giant scrap pile at the cost of what little functionality the robots have. He lost his left leg, left arm and right eye in a few accidents, his left leg is replaced by a gold club with a bandage tied on it, his left arm is replaced by a smaller blue-grey robot arm and the right eye is replaced by an eyepatch. A photo shows him with his nephew before some incidents.