Kip. 5: The Mightiest Warrior! Super Saiyan 4 Vegito!!

5

Cunber and Goku's battle breaks the seal around the Prison Planet, while Fu is enraged to discover that his laboratory has been destroyed. Cunber defeats Super Saiyan God Goku and knocks him unconscious. Just before Cunber can kill Goku, Xeno Goku and Xeno Vegeta arrive as Super Saiyan 4s and save Goku. They challenge Cunber, who transforms into a Super Saiyan, so Xeno Vegeta suggests that he and Xeno Goku use Potara fusion. They put on the earrings and fuse into Xeno Vegito. Xeno Vegito battles Cunber and manages to subdue him using a Kamehameha, before separating back into Xeno Goku and Xeno Vegeta. The resulting explosion breaks the seal completely. Fu returns, now furious over the destruction of his lab, and attacks Xeno Goku and Xeno Vegeta, who manage to block the attack. They then charge at Fu. (Source: Dragon Ball Wiki)