Monster★Race for Game Boy. It's over 20 years old. Startup has been confirmed. As of September 2025, the save data was still present, but the remaining battery life inside the cartridge is thought to be extremely low, so please assume the save function is unusable. Personally, I remember it being incredibly fun. I am selling it to organize my collection. * It will be shipped in a Game Boy cartridge case. * Please check the condition from the photos. * Items not in the photos are not included. * Startup confirmed (This means it was confirmed to start on my device, and does not guarantee operation after arrival). * Save function untested. Due to the age of the game (over 20 years old), battery replacement is likely required to save. * Occasionally, the title screen may not appear, but this can be improved by reinserting the cartridge. * The peripherals used for startup confirmation are not included. * Please understand that this is a used item before purchasing. * It has been stored in a case in a dark place. * I appreciate combined purchases, so please feel free to contact me in the comments. Example) Buy 2 items: 150 yen off, Buy 3 items: 300 yen off, etc. Thank you for viewing. #GameBoy #Monster★Race #MonsterRace #MonRe