This is a Game Boy game cartridge. The box and instruction manual have folds and dents. Please check the images for confirmation. Initial operation has been confirmed. It takes a few insertions and removals to start the game, and it's unclear if this is due to the Game Boy itself or the cartridge. The Game Boy used for the startup confirmation is not included in the product. To avoid any issues, returns are not accepted. Please understand that this item has been stored at home for a long time and is a used item before purchasing.