The Doron Empire of the Ganymede System discovered Earth and saw it as an ideal world to conquer. The drive to expand the empire was fueled by the power-hungry General Ozmel, who overthrew the reigning Queen Medusa of the Ganymede System to launch a universal conquest. As Earth was nearly subjugated, a scientist named Dr. Shikishima had one last hope: a colossal mecha known as the Mechander Robo, specially programmed and designed to repel the alien invaders and prevent Earth’s total takeover. Together with this powerful fighter machine, Dr. Shikishima recruited three pilots to be placed behind the …