When "Press Start" flashes at the title screen, press L2(3), Select(3), R2(3).
When "Press Start" flashes at the title screen, press Select(3), L2(3), Select(3).
Pause the game while fighting a boss, then press L2(3), R2(3), Triangle(6) to dramatically reduce the bosses energy level.
Pause the game and press R2(3), L2(3), R2(3), L2(6). Then, resume the game to have a new weapon. Repeat the code for a different weapon.
Pause the game and press L2, R2, L2(3), R2(3), Circle, Triangle, Square, Circle, Triangle, Square. If you entered the code correctly, you will hear a chime and the ninja will turn into a skeleton. Then the ninja will be invincible with infinite items and lives. Repeat the code to turn back into the ninja while keeping the extra items.
Remove all memory cards from the PlayStation. Then when "Checking Memory Card" appears on the screen, press L2(3), R2(3). If you entered the code correctly, the words "DELS LEVEL CHEAT ON" will appear. Now start a game to access the level select menu.
Starting at track 2 there are music and sound effects you can listen to from the game.
If you look close at lights, walls, trees, you will see a sparkle. Hit the sparkle with your dagger/ triangle Button and it will release a treasure.
This works on most any boss you will encounter in the game. To easily beat a boss, circle around it until it is not facing you, then throw your stars, or what ever throwing object you have at the time, at the bosses head, (the most vulnerable spot). Many bosses are four legged, so you will have to wait until they reer up, and then jump to hit them in the head.
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