Successfully complete Story mode to unlock Extra Battle mode. In this mode, the game can be replayed with different characters appearing in various levels.
Successfully complete five Extra Battle mode levels to unlock 77 Ring Knights mode. In this mode, you must defeat 77 opponents in succession.
Successfully complete all the default battles in Extra Battle mode. Alternately, successfully complete Story mode using all unlocked characters. To unlock the last Extra Battle mode battle, you must also complete 77 Ring Knights mode with four characters. Successfully complete the last Extra Battle mode battle to unlock Dio mode. In this mode, you can replay Story mode with Dio.