Super password:
Enter KDGY KRMV DDXR XWKQ as a password for every crest, fire power, potions, Gargoyles, and talisman.
Have all five vials:
Hold A at the title screen and keep that button held while pressing Start to begin a new game. Note: Passwords and options may not be used.
All items:
Enter QFFF KNRR DDLR XGTQ as a password.
Play as Ultimate Gargoyle:
Enter FDQP QRMB FGNH GTKL as a password.