Throughout the game you can either pause it (by pressing START) for menu options or you can go into your journal (by pressing BACK). Once you are in the journal, you can enter the cheat codes. The screen will flash when you have successfully entered the code. The directions are done on the D-pad:
|Left, X, X, X, Y, Y, Y||Big Weapon Mode|
|Left, Right, Right, Left, Left, Right, Right, Left, Y, Y||Infinite Spell Soul Energy|
|Black, Left, Right, Left, Left, Right, Left, Black||Big Demon Heads|
|White, Left, Black, Left, Y, X, Y, X||Rapid Fire Shotgun|
|Right, Left, X, Y, X,Y, Left, Right||Explosive Holy Bombs|
|Y, Y, Y, Left, Right, Right, Left, Left, Right||Shoot Large Fireballs|
Thanks to Revolution reader Robi el papi!