K-1: The Arena Fighters Codes -

Alternate costumes:
Hold L1 + R1 at the title screen. Three beeping sounds will confirm correct code entry. Press Start to choose alternate character costumes for Musashi, Andy Hug, and Sam Greco.

Fight as Master Ishii:
Select team battle mode. Press Up(2), Down(2), Left, Right, Left, Right, Start at the character select screen. Master Ishii will be selectable to the right of the regular characters.

Set strength level:
Press Start to pause game play and press L2, R1, L1, R1, L2, R1. Use the D-pad on either controller to change the flashing numbers on either side of the screen to any value between one and nine for the corresponding player.

Unlimited energy:
Quickly press Up, Right, Down, Left, Up, Right, Down, Left, Select when the phrase "Push Start" begins to flash on the title screen. The sound of an explosion will confirm correct code entry. Note: This code affects both players.

View ending sequence:
Hold L1 + L2 + Triangle + Circle + Left on both controllers and power on the PlayStation. Continue to hold all buttons until demo mode starts to view the ending sequence and credits.