Supernova Trophy in One Piece: Pirate Warriors 4
Achieved Battle Grade S in any episode
How to unlock Supernova
Your Battle Grade is determined by the amount of enemies you defeated and the time it took you to complete the episode. You will definitely earn this naturally as many Dramatic Log episodes have very lenient requirements to achieve an S Battle Grade. Simply obtain one in any episode to earn this trophy. Make sure that you are playing above Easy difficulty, since Easy will only award you with an A rank max.