Create a character, and enter "SHUICHI" or "VIKEIF" as a name to unlock a secret character. Shuichi has a high movement range, decent attack power and HP, but low defense. Vikeif has high attack power, decent movement range and HP, and fairly low defense. They have very good stats for Level 1 characters, but their levels cannot be raised. They are useful for a multiplayer game, but useless in story mode, as they cannot become any more powerful.