Grendizer U

Duke Fleed is the adoptive son of Daisuke Umon who is a famous scientist on Fleed Planet. Duke was able to escape from the fleed planet through a special spaceship of his father and reach earth. After a year spent on earth, he found knew that king Vega wanted to take over the earth too like his planet. He and his friend then wanted to stop him and for that hey were going to use a special weapon The Almighty Grendizer which is a robot.