I have confirmed that the game loads on my Game Boy Color. A barcode sticker is attached to the back of the outer box. * Regarding software with built-in backup batteries, we do not guarantee the battery. * We only guarantee initial functionality. We generally do not accept returns for reasons beyond initial startup confirmation, such as "stopping during gameplay." This is a used item and has been stored at home. Please understand this before purchasing. To prevent replacement fraud, we do not accept returns or exchanges after purchase. The item will be shipped in an OPP bag and bubble wrap.