Game Boy Advance: Ken Shimura's Baka-Dono-sama: Tenka Touitsu (Unification of the Realm). No box or instruction manual. Software only. I have confirmed that it starts up. I don't know how much battery life (battery) remains. It is unknown whether saving is possible. Please note that this item has been stored personally and may have some dirt or other imperfections. Please check the photos. If you request to purchase this item with other items, I will discount it by 100 yen. I will package it simply and ship it via Yu-Packet Post.