Beast King GoLion (百獣王ゴライオン Hyakujūō Goraion?, King of the Beasts GoLion) is a Japanese super robot anime television series. The animation from GoLion was edited and trimmed to create the Lion version of the U.S. Voltron: Defender of the Universe series.
GoLion's story starts in the year 1999, when the planet Altea is subdued and enslaved by the Galra Empire. Five space pilots return to Earth to find the planet annihilated by thermonuclear war. Eventually, the explorers are captured and enslaved, and forced to fight for their lives in Emperor Daibazaal's arena. The young pilots escape and eventually land on the planet Altea, where they discover the secret of the mighty sentient robot GoLion, the only weapon powerful enough to defeat Emperor Daibazaal's forces. Thousands of years ago, GoLion was an arrogant robot who, after defeating several Beastmen, tried to challenge a goddess to battle, but failed.