a Japanese mecha animated series produced by Sunrise and Asatsu-DK, created and directed by Oji Hiroi (Sakura Wars, Far East of Eden) and written by Shūji Iuchi (Mashin Hero Wataru). It aired in NTV from April 7, 1989 to March 2, 1990. It also spawned 3 special direct-to-video episodes and two Original Video Animation movies, as well as a video game for the PC Engine SuperGrafx.n 2050, the moon was mysteriously terraformed after a great earthquake. Fifty years later, the moon is now populated with humans and has become a popular tourist destination. After a boy named Daichi arrives on the moon for summer vacation, he accidentally meets an old witch, V-Mei, and her granddaughter Guri Guri. Both of them are members of the endangered Long-Ears race, currently at war with the evil Jadou Clan, who are also planning to take over Earth. V-Mei gives a magic gun to Daichi and reveals that he is the chosen Madou Warrior destined to save the Long-Ears race and their land Rabiluna from the Jadou Clan.

With the magic gun, Daichi can summon Granzort, a giant robot called a Madou King with the elemental power of Earth, to fight against the monsters of the Jadou Clan. During their travels, Daichi, V-Mei, and Guru Guri are later joined by two other Madou Warriors, Gus and Rabi. Gus's magic bow summons Winzart, the Madou King of Wind, while Rabi's magic top summons Aquabeat, the Madou King of Water.