After the game has booted up, during the attract mode, quickly press the following sequence of buttons: P1 Block (5 times), P2 Block (10 times), P1 Block (3 times), P2 Block (1 times), P1 Block (2 times), P2 Block (2 times), P1 Block (3 times), P2 Block (3 times). If entered successfully, the Ultimate EJB Menu will appear.