【Tested and Working】Chocobo's Dungeon ☆ WonderSwan - Platform: WonderSwan - Manufacturer: Bandai - Year of Manufacture: 1999 - Operation Check: Tested and Working - Included Items: With Case Thank you for viewing. I sell a lot of retro games. I enjoy playing and selling them myself. 【Game Cartridge Only】 This product is about 30 years old, but it works without any problems. I have confirmed that the software starts up on my game console. I cannot guarantee the remaining battery life. I have not opened the cartridge to remove special screws for battery replacement, etc. Although it's been over 30 years, there may be corrosion inside. The check involves inserting the cartridge into the console and checking the operation screen. The cartridge terminals have been cleaned. There may be compatibility issues with the console. Please don't give up and insert it firmly each time. Even without terminal cleaner, you can try rubbing the terminals with a cotton swab with Magic Clean, etc., and wiping them with a dry cotton swab to make it easier to read. Welcome to combine with other software ♥ Please contact me before purchasing. I will discount 100-200 yen for each additional item included ♥ When shipping, I will wrap it in cellophane to protect it from rain and reinforce it with bubble wrap or cardboard for sturdy packaging to prevent crushing.