Nazoo Oh (Mystery King) - A Wonderswan game. I collect retro games such as Game Boy, Advance SP, Super Famicom, and Nintendo 64 as a hobby, but I am selling this to organize my collection. The battery has been replaced, so saving is possible. I have tested the game and it works without any problems. I have cleaned the game cartridge and the terminal contact points. Finally, as this is a retro game, I would appreciate it if you could understand this before purchasing. I am also selling many other retro games. If you purchase multiple items, I will offer a discount depending on the number of items. It's like 100 yen off for 2 items, 200 yen off for 3 items... Please take a look at my other retro games. I also accept individual sales. If there are any games you are looking for that I haven't listed, please feel free to ask. If I have them, I will list them after discussing the price. #GameBoy #Color #GBC Wonderswan Color Game Cartridge