Akira Toriyama always meant for Vegeta to be younger than Goku, and this makes sense when comparing their power levels.

Dragon Ball Sparking Zero has already confirmed some of its new content, and a new trailer highlights more that's coming!

He did it for the first time in the franchise a few episodes ago, but as a kid. Fans shared scenes of the episode on social media as it aired in Japan: Can Vegeta Turn Into SSJ4 in Episode 20?