Game Boy Cartridge Medabots 2 with Case & Instruction Manual Operation confirmed & internal battery replaced, so data saving is confirmed to be problem-free. However, please understand that as this is an old item, we cannot guarantee all functions. We appreciate your consideration. *If save data remains, please delete or overwrite it. We offer bundle discounts, so please take a look at our other Game Boy related items. Please note that this item is also listed on other sites, so we apologize in advance if it is sold out due to a timing difference.