Malice

Unlock Dog mode:
Go to the title screen and press Y, Y, Y, Black, B, A, White, Left, Right,
Right buttons on your controller, begin a new game.

Unlock all Bonus Items:
Find all 100 Crystals in the game. Thre are 96 in the normal game
levels + 4 hidden.

Infinite Mana:
Go to Sound Options. Choose soundtrack. Listen to tracks 7, 3, 1, 5, 8 in
that order. Start a new game. You should have infinite mana.
This cheat cannot be used with a save file.

Extra life:
Find 10 crystal heart pots during game play.
You can find 5 crystals on every levels.

4 hidden crystal location:
Intentionally die. Go to the Beach Of Souls to the next Beach Of Souls
with the lighthouse. After, go through the firefly.