Gogeta
Name pun: Goku and Vegeta
Seiyū: Masako Nozawa and Ryō Horikawa
Voice acting: Sean Schemmel and Christopher Sabat
Gogeta (ゴジータ, Gojīta?) is the result of Son Goku and Vegeta merged together as a single entity by the means of the Fusion Dance. He first appears in Fusion Reborn. Even when fighting side-by-side, Goku and Vegeta realized they wouldn't be able to defeat the monster Janemba. Thus, Goku persuaded Vegeta to do the Fusion Dance with him. Gogeta's appearance has characteristics inherited from both Goku (face,the hair over his face, and physique) and Vegeta (hairstyle and widow's peak), but the clothes he wears are in the fashion of the Metamorans, the alien race that developed the Fusion Technique. While neither Goku nor Vegeta were a match for Janemba on their own, Gogeta had the strength and speed to overpower the monster, and easily defeated him.
Gogeta makes a second appearance in Dragon Ball GT, this time transformed into a Super Saiyan 4. At Super Saiyan 4 Vegeta's suggestion, he and Super Saiyan 4 Goku unite to battle the seemingly unstoppable Super Yi Xing Long. Aside from his bright scarlet hair (which is in the shape of Super Saiyan 4 Goku's hairstyle) and burgundy colored fur (which is a lighter shade of Super Saiyan 4 Vegeta's hair color), Gogeta's characteristics are similar to that of a usual Super Saiyan 4 in addition to still wearing his previously seen Metamoran costume. Unlike his regular Super Saiyan state, in which he is a deliberate, no-nonsense fighter, Super Saiyan 4 Gogeta takes on a somewhat of a wild, cocky demeanor, similar to Vegetto. He toys with and taunts the evil dragon lord, only getting serious after he'd tricked the dragon into using his Negative Karma Ball so that he could turn it into positive energy and undo the damage that had been done to the Earth by the Evil Dragons. He is completely invulnerable to any attack due to the immense power gap between him and pretty much all other opponents. His only weakness, his inability to maintain the fusion for more than 10 minutes, left him just short of time to finish off Super Yi Xing Long after repairing the planet.