Press Start at the title screen to display the main menu. Highlight "Option" and press Select. Select the "Password" option and enter RHT255457K or 2RHT255457K as a password for a fighter with 99% in every attribute. Return to the main menu and select the "Next Boxer" option to cycle through the characters. Select Ivanov as an opponent, defeat him, and enter Kumate mode. Select the "Pad Vs SNES" option until both characters appear to be identical. Defeat your fighter's twin. All opponents from the regular tournament will now appear in the Kumate.