Cheat Codes
To use the following cheats, you have to first enable the cheat mode. From the Title screen, press L, Select, A, Select, R, A, L, Select. This will activate enable the cheats:

Level select
Once cheats are enabled, use Select, R, and L to scroll through the levels. When you reach a level you want, press Left to move the cursor to the game Start option.

All weapons
Once cheats are enabled, begin a game (it doesn't matter what level you choose). Press Select+B to instantly get all weapons.

Move in any direction
Once cheats are enabled, begin a game (it doesn't matter what level you choose). Press Select and the D-pad to go in any direction.

Get more continues trick
When you see the continue scree, quickly tap the Start button and you can boost your remaining continues up to 9!
submitted by ninja scroller

Cheats