Fight as Sara, Bun Bun, Jacky, and Jeffry:
Complete the game with each character with normal or
greater difficulty.
Fight as the Boss: Set the difficulty level to hard, number of rounds
to two or more, then complete the game in single player mode.
Big head fighters: Enable all characters, including the Boss and four
bonus fighters. Use each of these characters to complete the game
to access a big head mode option.
