Question: dbz can vegeta go ssj3?
Answer: Goku can sustain ssj3 but Vegeta's power up will only stay there until some minutes after he stops powering up. ... And Goku's ssj2 didn't even MATCH his ssj3, WITHOUT training, so by the end of Super AT LEAST, I'm sure Vegeta can go there. Ssj3 is hard for anyone and just because Vegeta never ssj3, we think he can't.