Gogeta

Gogeta (ゴジータ) is an anime-only character who is the resulting fusion of the two highly powerful Saiyans, Son 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 is famous for his amazing power and speed, and is often regarded as one of the series' most powerful characters, along with his Potara Fusion counterpart, Vegito.

Voice Actresses & Actors
all information on Gogeta came from http://dragonball.wikia.com/wiki/Gogeta
 * Japanese : Masako Nozawa (Goku's voice)
 * Japanese voice actor :
 * English voice actor :