Gogeta is Goku and Vegeta fused together by doing the fusion dance. You dont see him in the series but he's in Dragonball Z movie 12 Rebirth of Fusion.With washboard stomached result in fusion and you see him sometimes in Dragonball GT. Gogeta is fantastically powerful and takes out JanenbaAnd since effortlessly in movie 12,and probulay would of done the same thing to Li Shenronif he wernt so cocky. That's a result of fusion. He's stronger than Vegetto but since fused characters without earring's can only stayed fused for 30 minutes.