Union of Rivals
Majin Buu is beating hell out of Goku after absorbing Gohan. When it seemed like Goku is going to die from the hands of Majin Bu. Suddenly Goku sensed energy of Vegeta and teleported him self where Vegeta was to fuse with him using Kai earrings. But Vegeta refused to fuse with him and went to fight Bu on his own and he got his but kicked. Then he agreed to use earrings. They both fused together and formed Vageto.
