30 Lives
At the title screen, hold Left
and press A, A, A, Start
.
9 Continues
Press X
rapidly when the title screen appears.
All Weapons
Pause the game and press Up, Up, Down, Down, L, R, L, R, B, A, Start
. This should give you all weapons except your special gun.
Arcade Mode
At the options screen, highlight GAME LEVEL and press A
rapidly.
Bonus Round
When you get to the level with toxic bubbles floating around, go to the very end of the level where you see enemies in bubbles coming out of 2 openings. Destroy everything coming from the bottom opening, then enter it. The rest of the level will dissolve and the bonus round will begin.
Random Weapon Select
At the weapon select screen, press X, Y, X, X, Y, Y, X, Y
.
Self Destruct
To self destruct, pause the game and press Up, Up, Down, Down, Left, Right, Left, Right, B, A, Start
.
Super Demo
For a better demo, hold A
when the title screen appears.
Unlockable: Extra Credits
When youre at the title screen, press the X button as many times as you can and then press start before the screen fades out.
Unlockable: Full Power-Up
Pause the game. Then enter UP, UP, DOWN, DOWN, L, R, L, R, B, A.
Unlockable: System Reset
Hold L + R and Start, then press Select.
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