To enter the codes below you must watch the entire opening cinema. When the title screen appears, hold L1 + L2 + R1 + R2 and press Select. The words "PUSH START" will change to "SECRET CODE" with two letters behind it. From here you can use Up and Down to change the first letter, or Triangle, and X to change the second.

Enable cheat codes, then set the code to MA and press Select. Change the code to SV and press Start. The following commands must be entered using Controller Two:

Code      Effect
Up        Boosts weapon power to maximum for 10 seconds
Down      Toggles voice mode
Left      Change gunlock type
Right     Skip area and disable invincibility
Triangle  Toggles invincibility
Circle    Increases bombs
Square    Change weapon type
X         Increases weapon power-up time by 30 seconds

To use these codes follow the directions for the "Cheat Codes" trick above.

Level  Code
2      MA
3      UT
4      RH
5      MK
6      HT

To use these codes follow the directions for the "Cheat Codes" trick above.

Code  Effect
QB    Makes player large
CM    Makes player small
MV    Display smaller buttons by pressing
      any button on Controller Two
SS    Ceapon power-up time starts at 999 seconds
YI    Start with nine bombs
TY    One hit kills player