How do you earn stars on Dragon Ball raging blast?

Answer 1

All you have to do is go to a mission you completed,look for "mission" at the bottom,click on "mission",look at the missions,and if it shows something you can do,play the battle and get the stars.

Answer 2

it is found randomly. when you find the dragon balls, they are in a random order but never repeated you will get them all when you find seven. never any repeats. just collect dragonballs from seven levels and you will have it

Answer 3

you can find it fighting buu .I find it there i hope i helped you :) try it out