ref: 39d31cecb263498e286c1fba3b8e0c6d439244b9 dir: /data/key_items.asm/
KeyItemBitfield: db %11110000 db %00000001 db %11110000 db %01001111 db %00000000 db %10011111 db %00000000 db %11000000 db %11110000 db %00111011 db %00000000