Dragonball: Evolution (PSP)

The story begins with Goku, who seeks out upon his adoptive grandfather Grandpa Gohan's dying request to find the great Master Roshi and gather all seven Dragon Balls. Of which he has one, in order to prevent the evil Lord Piccolo from succeeding in his desire to use the Dragon Balls to take over the world. And Goku's quest is to obtain the mystical Dragonballs before Piccolo does.