Gogeta (Super Saiyan 4)

Gogeta's History

In the movie Dragon Ball Z: Fusion Reborn, both Goku and Vegeta find themselves outmatched by the monster Janemba and agreed to fuse to gain an upper hand, despite Vegeta refusing at first. Their first attempt resulted in an embarrassingly weak fusion (known as Veku by South Kai and the fans) due to Grand Kai noting Vegeta failing to extend his index finger properly in the final step of the dance after the failure. Thankfully, they managed to succeed in their second attempt thanks to the help of Goku's ally, Pikkon, and managed to defeat Janemba with their immense power.

In the TV show Dragon Ball GT, Gogeta is shown near the finale after Goku and Vegeta fuse into him whilst in Super Saiyan 4 to fight Omega Shenron, but since the power on Super Saiyan 4 was so great it decreased the Fusion time limit to a whole 10 minutes, the two Saiyans defuse before defeating him.

In Dragon Ball GT, Gogeta is willing to toy with Omega Shenron by using absurd pranks to enrage the Shadow Dragon and was highly confident in his power to destroy Omega despite ultimately defusing unexpectedly due to strained fusion time. Despite this, his taunts are not empty and pointless, as he was able to goad Omega to launch his Negative Karma Ball and subsequently purified it to disperse the negative energy surrounding Earth; after doing so, Gogeta does become much more serious and attempts to destroy Omega posthaste.