Created from an illustration in Tommy's mythology book by Lord Zedd, Robogoat hypnotized Tommy into giving him the Sword of Power. When Tommy was no longer under the spell, he went after the sword but what he thought was the sword was just a trick. Robogoat captured most of the rangers in the crack of a earthquake except for Jason. Jason then freed them from energy bubbles they were being held in, by striking his chest. They then destroyed Robogoat with the Thunder Megazord. He was brought back twice after that for Halloween and the big wedding.
Also best warrior history monster named Robogoat in during MMPR "The Green Dream" on Zyu2.