Prequel bonus:
If you have a saved game file from One Piece Unlimited Cruise: Episode 1, you can transfer boss characters and your character stats.
Boss Rush mode:
To unlock Boss Rush mode, defeat the One Piece Unlimited Cruise Bosses with the Fury Boost and collect the map pieces on Unlimited difficulty.
Survival mode:
To unlock Survival mode, beat the game on Normal difficulty.
Unlockable characters(Vs. mode):
Unlock the following characters in Vs. mode by defeating them on the corresponding difficulties:
CHARACTER – HOW TO UNLOCK
Crocodile – Defeat him on the Normal difficulty.
Doflamingo – Defeat him on the Normal difficulty.
Edward Newgate – Defeat him on the Normal difficulty.
Final Boss – Defeat him on the Normal difficulty.
Final Boss (alternate form) – Defeat him on the Hard difficulty.
Garp – Defeat him on the Unlimited difficulty
Human Lucci – Defeat him on the Normal difficulty.
Kaku – Defeat him on the Normal difficulty.
Kid – Defeat him on the Normal difficulty.
Kizaru – Defeat him on the Normal difficulty.
Leopard Lucci – Defeat him on the Normal difficulty.
Mihawk – Defeat him on the Normal difficulty.
Pauly – Defeat him on the Normal difficulty.
Shanks – Defeat him on the Normal difficulty.
Smoker – Defeat him on the Normal difficulty.
Vivi – Defeat him on the Normal difficulty.