Dragon Ball is a series full of incredible transformations fans can't get enough of. The Saiyans have enjoyed several forms that let them reach new heights of power and decimate their foes in style.
Vegeta has contributed little to Dragon Ball DAIMA, and Super Saiyan 4 is the only way he can contribute to the fight against Gomah.
Many different kinds of fusion between the Saiyans have been shown, but there has never been one between 2 Super Saiyan 3's!