Art Gallery Tip  -  In the Art Gallery, the correct sequence to look at the pictures is: 

4 2 3 6 7  1 5
Where 7 is the picture at the end of the room and 1 is the picture of a baby. If it works, the crows won't attack and the painting will move to reveal a crest. 

Art Gallery Tip  -  3-5-6-4-2-7-8 These are in order where the first painting is the one at the door where you walk in and painting no. 8 is the painting right at the end of the hallway. (editors note: I don't know which one is correct).

Activate Battle Mode  -  To activate the battle mode, you must first finish the game and watch the credits. Now go to the second title screen and scroll the menus. Now, you will find "Battle Mode" under "Load Game". Your mission? Kill all the enemies and enter the secret zone.