Thank you for viewing. This is a Nintendo GAME BOY cartridge, Mario's PICROSS. I do not currently own a Game Boy, so the operation has not been confirmed, but the condition of the terminals is very clean, so I think it should be okay. The case is generally clean, but there are a few wrinkles and stains. The cartridge and instruction manual inside are in quite good condition. The cartridge terminals are clean, as mentioned above. Other than the possibility that the plastic base may be slightly discolored, it seems to be in good condition.