Gogeta (ゴジータ, Gojīta) is the resulting fusion of two highly powerful Saiyans, Goku and Vegeta, when they perform the Fusion Dance properly. His voice is a dual voice that contains both Goku's and Vegeta's voices. Gogeta's Super Saiyan 4 transformation is famous for his amazing power and speed, and is often regarded as the series' most powerful character. His Potara Earring fusion counterpart is Vegito. Gogeta is an anime-only character, meaning he never appeared in the manga.
Gogeta wears the same clothes that all creations of the Fusion Dance wear. However, Gogeta's vest has a different color scheme than Gotenks'. The padding around the neck and shoulders of the vest is reddish orange rather than yellow, and the rest is either a very dark blue or a dark gray, rather than the lighter blue vest that Gotenks wears. The hair is very similar to Vegito's, with the only differences being that Gogeta only has one free hanging lock of hair instead of two and Gogeta having Vegeta's widow's peak. Gogeta possesses Goku's body structure, he is tall and slender, but he seems to mostly possesses Vegeta's facial features
Although they are made in the very same way, Gogeta has personality traits that are different from Gotenks, though it is impossible to tell which counterparts' personality is the dominant one. And since his appearances have been limited and short, it is difficult to tell if his personality is a separate one, or a composite of both Goku and Vegeta, although at Super Saiyan 4 it seems that his personality is like that of Vegito (which leans more towards Goku). Super Saiyan 4 Gogeta can be equally serious as his Super Saiyan form or more if he needs to.
Gogeta is formed by the merging of two mighty Saiyans, Goku and Vegeta, via the Fusion Dance. He is the second fusion performed through the Fusion Dance during the Dragon Ball Z series. He, like his fusion son Gotenks, was a desperate fusion done to defeat a powerful enemy; Gogeta's enemy was Janemba in Fusion Reborn and Omega Shenron in GT.
In Fusion Reborn, Gogeta made an appearance during the end of the movie. After Janemba transformed into his Super Form and became too powerful for Goku and Vegeta to handle, Goku quickly taught the Fusion Dance to Vegeta. The Fusion Dance must be performed correctly to create a very powerful warrior, so when Vegeta failed to extend his index finger in the final step of the dance, this resulted in a much weaker fusion warrior named 'Veku'. Veku was no match for Janemba, and for thirty minutes he frantically evaded the demon's attacks in comical fashion, clumsily stumbling and passing gas as part of his defense. The second time around and with the assistance of Goku's ally Pikkon, the Fusion Dance was performed correctly, and Gogeta was born. After an amazing display of speed and power, Gogeta finished off Janemba with the Stardust Breaker. With the elimination of the negative energy that had created Janemba, the creature reverted back into the young ogre, Saike, who ran off in fear when he made eye contact with Gogeta.
Shadow Dragon SagaEdit
This marks the first and last time the Fusion Dance was used between Goku and Vegeta in the anime.
During Dragon Ball GT, Goku and Vegeta fused into Gogeta at Super Saiyan 4 to combat Omega Shenron. Having achieved his ultimate potential, Gogeta easily overpowered Omega Shenron and even used his supreme power to gloat and toy with the Shadow Dragon. However, Gogeta spent too much time toying around with Omega Shenron and the fusion did not last as long as expected because of the tremendous power he possessed, thus he was unable to finish him off.