Aquarion EVOL

Thousands of years after the war between the gods and the Aquarion, humanity faces a new threat from another world. Amata Sora, a young man who joined the DEAVA organization, becomes a pilot of the Aquarion, a giant robot formed by the fusion of three fighter craft. Together with his fellow pilots, he fights to protect the world, while the mysteries of the past and the "Evol" phenomenon are slowly revealed.

Selected season 1, episode 1.