Gogeta

Gogeta is an inhanced version of Goku really. He is incredibly strong. He is the combination of Son Goku and Vegeta. Vegeta doesnt really like to fuse with Goku inless he is near death. Vegeta hates having the thought that he is part of Goku's body now. Gogeta could probably battle Vegeta and Goku at the same time, and possibly defeat them, that is how strong he is. Gogeta only makes an appearence in Movie 12 "Rebirth of Fusion" in the Dragon Ball Z/GT movie series. Which must be very rare you get to see him. Gogeta is only one fusion of two that Goku and Vegeta can create. The other is Vegitto. But with Vegitto, they need special earrings.