Mobile Fighter G Gundam

In Year F.C. 60, much of humanity dwells in space colonies that orbit the Earth. The struggle for control over these colonies is settled every four years in a grand tournament in which each nation fields a single representative to duel one another with a colossal Gundam. Domon Kashuu is chosen to represent Neo-Japan in one of these tournaments, but his motive extends beyond national victory: he fights to find his brother, who has been blamed for the deaths of their parents and the disappearance of a dangerous weapon, the Devil Gundam (Dark Gundam).