At the Soul Fighter logo, press Left + Y. Enter the options menu, then exit. If done correctly, the next screen that appears will be the cheat code screen. Then, enter one of the following codes to activate the corresponding cheat function:

Extra health

Enter "ABXXYA" as a code at the cheat code screen.

All weapons

Enter "XAAYBB" as a code at the cheat code screen.

Level 2

Enter "AABXYA" as a code at the cheat code screen.

Level 3

Enter "XAYAAB" as a code at the cheat code screen.

Level 4

Enter "YYBAXA" as a code at the cheat code screen.

Level 5

Enter "BABXXY" as a code at the cheat code screen.

Level 6

Enter "XAXBYY" as a code at the cheat code screen.

Level 7

Enter "ABXBYB" as a code at the cheat code screen.

Level 8

Enter "YBBAXY" as a code at the cheat code screen.

Level 9

Enter "BYAAXB" as a code at the cheat code screen.

Level 10

Enter "XABBAX" as a code at the cheat code screen.

Level 11

Enter "YBYXAB" as a code at the cheat code screen.

Level 12

Enter "XBAXBY" as a code at the cheat code screen.

View credits

Enter "AAAAAA" as a code at the cheat code screen.