Super Saiyan 4 Fusion

Omega Shenron realizes that Goku and Vegeta have a plan, so he rushes in to stop them. Gohan, Goten, and Trunks cut him off to buy their fathers some time. While they hold Omega Shenron off, Goku and Vegeta fuse. They are now Gogeta, and are far more powerful than Omega Shenron. His punches are too fast even for the dragon to see. But instead of quickly finishing the job, Gogeta toys with Omega Shenron. Furious, the dragon unleashes all of the Dragon Balls' negative energy in one massive attack. Gogeta redirects the ball away from the earth, and the negative energy that was enveloping the earth dissipates. Gogeta then hits Omega Shenron with a giant Kamehameha wave, but it doesn't quite kill him. Before Gogeta can finish him off, he splits in two again. Six of the balls have been dislodged from the dragon's body, and before he can suck them all back up, Goku grabs the four-star ball.