You can't.
You cant
There are no Great Apes or other giant characters in Raging Blast 2.
By doing the stories on the game
yea
Dragon Ball:Raging Blast 2 is better because they have movie villians like Cooler and they have some series characters that Raging Blast left out.
Collect stars.
you cant
no raging blast 2 is only dragon ball Z characters
On raging blast 1 you keep playing the trials and get #1 and new ones unlock the punching machine is the last to unlock.
to play a lot of dragon ball raging blast 2 that`s what i did when i played super smash bros brall
Beat the bardock saga.
if you have it for play station 3 you can download them for free but if you want to earn them look on game spot.com