Mado King Granzort

is a Japanese mecha anime produced by Sunrise and Asatsu-DK. It aired on Nippon TV from April 7, 1989 to March 2, 1990. It also spawned two OVAs on 1990 and 1992 respectively.

Plot
In 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 Haruka 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 the wind-elemental Winzart, while Rabi's magic top summons the water-elemental Aquabeat.