You have to win a entire tournement with a character.
According to Dragon Ball Wiki, no. But I have played Dragon Ball Z: Budokai 2, and you can unlock him there by wishing for the fusion from Shenron.
beat him in the game
you cant
you can unlock vegeta ss3 by doing a unlock able mode in dragon ball raging blast the game
put
Go to single player, tournaments, select character you want and fight.
Fuse the Z-items Baby and Vegeta 2nd form to unlock his base form.
yea
I don't
Unlock the What IF saga
According to Dragon Ball Wiki, no. But I have played Dragon Ball Z: Budokai 2, and you can unlock him there by wishing for the fusion from Shenron.
Collect stars.
broly
beat him in the game
you cant
you have o play though the scenarios an till you unlock the z items Son of Paragas + Hatred of Goku and then you fusion them
you can unlock vegeta ss3 by doing a unlock able mode in dragon ball raging blast the game