How can you get ss3 broly in dbz raging blast

Collect 20 stars in Dragonball Collection and go to the star shop and purchase the secret battle in the "Legendary Super Saiyan Saga". Complete the level and he will be playable. To earn stars, complete any mission and when you go back to play it again, look for a 'mission' tab and view objectives. Example you get a star for beating any level on the hard difficulty.