Duel Monsters 1-4 + 3 boxes All have been tested and confirmed to work on a Game Boy Color at home. Please note that there are 4 software cartridges but only 3 boxes. Also, please be aware that some save data remains. *There are minor stains and scratches due to personal storage. Please consider this item with the understanding that it is a used product. If you have any other questions, please comment. Instant purchase is welcome. Thank you.