Real Name: GygorShortly after the Great Unrest, Keldor was driven behind the Mystic Wall and Gygor, Lord of the Vine Jungle, lead an army of beast men in a series of raids against the long forgotten Castle Grayskull, believing the many tales of its great and mysterious power. It was only through the combined powers of Oo-Larr- the jungle He-Man and The Goddess that Gygor was defeated and placed in a state of suspended animation. Eventually, Hordak returned to Eternia and the savage gorilla was freed by Evil-Lyn in her attempt to bolster Skeletor's forces against the new Horde army. Gygor uses his great strength to fight the Heroic Warriors.
Quote from Roger Sweet's book Mastering the Universe:
Another misfit from Big Jim was the Big Jim gorilla. I suggested redoing the creature for Masters and mocked up a prototype. I changed the ape's body color from black to bright yellow and gave him a dark olive-green face and chest. His face was contorted, with white teeth snarling in an open mouth of blood red. I gave him a black body harness. From his shoulders, I hung a dark maroon cape.