How do you beat janembaon Dragon Ball Z ultimate tenkaichi

Well, it takes you beating him when he's really fat (boss battle), and to beat him in his other form. You badically have to try really hard. I lost the first time I wnet up against him. At first, you are super sayain three goku, then super sayain vegeta, and then you fuse to get gogeta (super sayain one). Once you become gogeta, it's really easy.

Hint: Try to put your ki up and get into striker booster; you hit faster than your enemy (no matter what) and you do not have to go through clash.