Expansion of Treasure Chest subroutine

The treasure chest bits are at $7E1E40-$7E1E7F. The code is inevitably in bank $C0. Make a search for "$1E40", $C01614, $C04C24 (chest opening) and $C0BB14 (RAM / SRAM init) will come up. You answer should be $C01614, but I have not really looked closely at that code.

BTW, this is a cool work. Nothing stops you once you found all relevant code to expand a data structure with any mean of programming, python or C family languages. A quick script can automate the data shuffling and the rest is regular ASM work and data relocation in some other ROM spot (expanding usually mean it won't fit in original ROM place unless you cut back on an amount of entries).