Cheat mode
Watch the opening demo run until it completes. Press
and hold [L1] + [L2] + [R1] + [R2] and press
[Select] on controller one when the title screen appears.
The "Push Start" text will change to "Secret Code"
to confirm correct code entry. Note the 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.
| 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. |
Debug mode
Set code to "MA", press [Select], change
code to "SV", and press [Start]. Press the following
buttons on controller two:
| 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. |