Martial Masters

Expert mode:
Hold A + B + C + D while starting a game.
Information in this section was contributed by ossiy.

Full gauge mode:
Select two player vs. mode, then hold Up + A + B + C + D for both the player one and player two sides simultaneously before the start of the first round.

Main enemy fight:
Hold Start and press A when choosing a fighter at the character selection screen to advance directly to the second to last stage for a fight against your main enemy.
Information in this section was contributed by ossiy.

Fight as Saojin:
Note: This requires operator's access to the machine. Play the game for a few rounds, then select the "Calendar Setting" option at the main menu. Change the date to two months in the future then exit the main menu. Enter the player selection screen. A box will now appear over Master Huang's head with the number "99". Insert 99 credits and the box will disappear and be replaced with Saojin's portrait. She can now be selected as a character. Note: The old MM data may need to be cleared before this is done.