Great deal with set purchase!! This is a listing for a working Super Famicom Super Mario World game cartridge. It has been inspected and cleaned, and is fully functional. It has not been disassembled for cleaning. As an option, for an additional 250 yen (per game cartridge), we can replace the internal battery with a new one. Please comment if you would like this. As it is an old item, there may be some dirt and yellowing. Please refrain from purchasing if you are sensitive to this. We will pack it carefully and ship it.