Goku and Vegeta, and their sons Gohan and Trunks, knew it would be up to them, and the only way they could increase their power levels in a short time would be to use the Hyperbolic Time Chamber.

Goku and Vegeta both reach the Super Saiyan ... form all the way to Super Saiyan 3 when he's trapped in the Hyperbolic Time Chamber. During this moment, he transforms into Super Saiyan 2 for ...