Gear Fighter Dendoh

One star filled night, a red light crashes down on an island in Japan, carrying with it 6 data weapons and a turquoise haired girl. Seventeen years later, "Gulfer", a machine empire out to kill all living beings and conquer the universe, plants itself an outpost on the Moon and commences attacks on the Earth. GEAR, a secret organization established to counter the Gulfer, defends Earth from this threat. Dendoh, GEAR's main fighting weapon against the Gulfer, chooses two elementary school kids named Hokuto Kusanagi and Ginga Izumo to pilot it, and with GEAR's and the 6 data weapons' help, they fight to protect the Earth from the Gulfer.

Synopsis from Anime News Network