Bonus Lives:

Start a two-player game and press A + B at the exact moment that player two loses his last life.

 

 

CheatCodes:

NOTE: This cheat needs to be done with a GameGenie.

1. SZPTSI--------Both Players Have infinite lives
2. PAPKXZ--------Both Players Start with 1 life
3. PAPKXX--------Both players start with 9 lives
4. GXZTSG--------Keep weapons after death.