Note: This game is also titled Rapid Reload.
Wait until the opening demo completes. Then when the title screen appears, hold L1 + L2 + R1 + R2 and press Select. If you entered the code correctly, the "Push Start" text will change to "Secret Code". There will now be two letters behind the "Secret Code" text. Press Up or Down to change the left letter. Press Triangle or X to change the right letter. Then, enter one of the following codes to enable the corresponding cheat effect:
| Code | Effect |
| MA | Start at Stage 2 |
| UT | Start at Stage 3 |
| RH | Start at Stage 4 |
| MK | Start at Stage 5 |
| HT | Start at Stage 6 |
| CM | Small character (does not alter hit check size) |
| QB | Large character (does not alter hit check size) |
| MV | Press X, Square, O, Circle on controller two for smaller windows on screen |
| YI | Start with nine bombs |
| TY | Axel or Ruka can kill with one hit |
| SS | Weapon power-up time starts at 999 seconds |
Enable the "Cheat mode" code. Then, set the code to "MA", press Select, change code to "SV", and press Start. Now press one of the following buttons on controller two to enable the corresponding cheat effect:
| Button | Effect |
| Up | Boosts weapon power to maximum for ten seconds |
| Down | Toggle voice mode |
| Left | Change Gunlock type |
| Right | Skips area and disengages Invincibility |
| Triangle | Toggles Invincibility (falling will still cause damage) |
| Circle | Increases number of bombs |
| Square | Switches selected weapon type between Axel and Ruka |
| X | Increases weapon power up time in 30 second increments |