This may be a result of lazy artists, as we sometimes see. But I'm not sure if Vegeta ever truly reached SSJ2. He had SSJ2-like powers, hair, and the aura with electricity when he became Majin Vegeta, but then we never see that again throughout the end of the Buu saga or GT. We see a rage session or two in Super where he has the electric aura, but he didn't have the hair that is typical of SSJ2. So what do you think? Did he ever really achieve the form?