Eh...someone test this code on the actual game card.
It's pointless, but fun to do maybe once...er twice (it works on ROM):
Edit: I'll just keep the visible part disabled and leave it invisible...this game uses too many buttons to access the other menus.
Invisible Inventory Icon (The Bag in the upper left corner [you can still touch that spot..its just invisible]):
If you want the icon to appear just write 1 to the address...Code:223BF94C 00000000