This is a Tamagotchi Osutchi and Mesutchi set. The Mesutchi has been confirmed to be working. The Osutchi was used around the same time, so it should work fine, but the screws seem to be stripped, so I haven't checked it by replacing the batteries. Please consider the Osutchi as junk. Please understand that these are used items. Also, to prevent swapping, we do not accept cancellations after purchase.