Game Boy Color - Skeleton Purple Battery 8 Game Cartridges This is a set. All cartridges have been tested and confirmed to work. - Pokémon Pinball - Kirby Tilt 'n' Tumble - Hamtaro: Ham-Ham Heartbreak - Hamtaro 2: Treasure Hunt - Sylvanian Melodies - Pokémon Yellow Version - Harvest Moon 2 GBC - The Legend of Zelda: Link's Awakening DX The sound from the main unit's speaker is almost non-existent. When headphones are plugged in, there is some static, but the sound can be heard clearly. The battery does not include the part to plug into the outlet, so it is not included. Therefore, its operation has not been confirmed. The batteries used for the operation check will be included.