This is Mon Colle GB for the Game Boy Color. It's over 20 years old. I've confirmed it starts up, but saving is not possible. It's likely the internal battery is dead. I'm selling it to organize my collection. * It will be shipped in a Game Boy game case. * Please check the condition in the photos. * Items not in the photos are not included. * Startup confirmed (This means I confirmed it started on my device, and does not guarantee functionality after arrival). * Saving function not confirmed. Due to the game being over 20 years old, battery replacement is likely required to save. * Occasionally, the title screen may not appear, but this can be fixed by reinserting the cartridge. * The peripherals used for startup confirmation are not included. * Please understand that this is a used item before purchasing. * It was stored in a case in a dark place. * I appreciate bulk purchases, so feel free to ask in the comments. Example) Buy 2 items: 150 yen off, Buy 3 items: 300 yen off, etc. Thank you for looking. #GameBoy #GameBoyColor #MonColleKnight MonColleKnightGB