Gogeta Super Saiyan 2

Goku and Vegeta still stand no chance against Omega Shenron. It is not until they fuse into Super Saiyan 4 Gogeta that their power vastly exceeds that of the Shadow Dragon. However, Gogeta spends too much time playing around with Omega Shenron and the fusion wears off in ten minutes rather than the usual 30 minutes, due to his own tremendous power, ultimately failing to finish Omega Shenron off in time (but manages to land a Big Bang Kamehameha on Omega which made him regurgitate the Dragon Balls, reverting him back into Syn Shenron). Goku eventually kills Omega Shenron with the Universal Spirit Bomb.