Can a GameCube memory card work for the wii because mine doesnt work?

Yes, a GameCube memory card can work with the Wii, as the Wii is designed to be compatible with GameCube peripherals, including memory cards. If your memory card isn't working, it could be due to a few reasons, such as a faulty card, dirty contacts, or an issue with the Wii's memory card slot. Try cleaning the contacts of the memory card and ensuring it's inserted correctly; if it still doesn't work, you may need to test it on a GameCube or consider getting a different memory card.