Hold L when in the menu (by pressing Z) and release L once finished inputting the code. The first two are done in levels with pearls, the third in any adventure level.
|Password||What it does|
|X, A, X, X, X, A, X, X||Pearls are replaced with Coins.|
|X, X, X, X, A, X, X, X, X||Enemies fly off the screen with one hit.|