Great deal with set purchase!! For sale: Working Nintendo 64 Donkey Kong 64 (DK64) game cartridge. Inspected and cleaned, works without issue. Has not been disassembled for cleaning. As an option, I can replace the internal battery with a new one for +250 yen (per game). Please comment if you'd like this. Being an older item, there may be some dirt and yellowing. Please refrain from purchasing if you are sensitive to these issues. Will be carefully packaged and shipped.