To play as the hidden bosses B.G. Bull, Ittetsu Wakamoto, and Rikiouzan in the World Championship Mode, hold the "L" button and hover your cursor over League mode (the 4th option from the mode selection screen). Next, a small window will open asking you to choose how many players will be competing in the League mode. While this window is open, press the "Y" button to be brought back to the main menu. The cursor should now be placed over World Championship Mode (the first option from the mode selection screen). Choose World Championship mode in either the singles or tag divisions . If done correctly, the three hidden bosses will be unlocked and now visible to choose from in World Championship mode.