Enter one of the following four digit numeric codes in the cheat codes box at 
the top right corner of the "Advanced" page under the "Properties" item. Some 
of the codes will not work if entered after game play has started. 

Unlimited credits -
Enter 2509 to enable the free play (unlimited credit) selection on the options 
screen. Enter 9052 to disable the code.

Player one invincible -
Enter 1971. Enter 1791 to disable the code.

Player two invincible -
Enter 1515. Enter 5151 to disable the code.

Player one extra damage -
Enter 0708 to have player one's attacks cause more damage. Enter 8070 to 
disable the code.

Player two extra damage -
Enter 3366 to have player two's attacks cause more damage. Enter 6633 to 
disable the code.

Quick game -
Enter 4774 to complete the game after one CPU opponent is killed. Enter 7447 to 
disable the code.

Easy fatalities -
Enter 1037 to enable a fatality when HP + LK is pressed. Enter 7301 to disable 
the code.

Fight as Grox -
Enter 3871 to allow player one to fight as Grox. Enter 1783 to disable the 
code.

Fight as Exor -
Enter 9021 to allow player one to fight as Exor. Enter 1209 to disable the 
code.

Toggle framerate -
Enter 5721 to toggle the framerate display.

Level select -
Enter one of the following four digit numeric codes in the cheat codes box at 
the top right corner of the "Advanced" page under the "Properties" item. Some 
of the codes will not work if entered after game play has started.