I am using this Nintendo Wii product and am trying to play Luigi's Mansion with it, which was the main reason for my purchase. Everything has a key problem. However, the game recognizes the memory card but says it needs to be formatted and then when saving the game writes that the game may not have been saved. And if you remove your memory card or turn off your console for any reason, the formatting will be removed and you'll lose all your save progress. This makes it really difficult to save progress for games with a memory card that works with the GameCube, but it doesn't allow you to save games, nor does it stay formatted to save games at all. me.