Skeleton Warriors

99 lives:

Right, circle, triangle, circle, x, square, circle, left, down, left, circle, triangle, square.

Level Select:

Go into the Options menu and settings your next game to Easy Mode. When in the game press Start to pause the game and enter the this code : Triangle, Circle, Circle, Left, Circle, Up, Down. After this unpause your game and hold the Start and Select button to bring yourself back to the Title screen. Go into the Options menu and you should notice that there is a new option at the top of the menu, which displays a Level Select.

Unlimited Heart Stone:

Press Start to pause your game while playing. Enter the code: Left, Up, X, Square, Up, Down, Square, then unpause. If done correctly, your Heart Stones will increase to 80.

Transparant Character:

Pause the game and enter:

D, O, S, S, U, X and press START

Not only are you transparent but you are also Invincible.