Seven Samurai 20XX Cheats
After finishing the game under normal difficulty.
After finishing the game and saving when prompted, pick the LOAD option at the title screen and choose your previously completed file. You will begin the new game with all status bonuses from your first game. Or push L1 + R1 at the katakana selection screen to use katakana in both hands.
After finishing the game under hard difficulty.
After beating every one of the Bosses in one game session under any difficulty. You must fight all thirty Bosses consecutively in Coliseum mode.