This is the Game Boy Advance game "Yakuman Advance." It supports four-player mahjong. Startup has been confirmed. Please note that due to the battery backup in this old software, we cannot guarantee the battery life. The battery had remaining power at the time of listing. While the game is relatively clean, there is some age-related wear and tear, so I've marked it as "slightly dirty." Due to the above reasons, it is ideal for those who have a compatible device that can save to the main unit, or those who can replace the battery themselves. Those who are not comfortable with used items should probably avoid this. #Yakuman #YakumanAdvance #GameBoy #GameBoyAdvance #Mahjong #Nintendo #PlayAnywhere #PortableGameSoftware