The Nintendo Wii stores its game data using its own internal memory, unlike other Nintendo products, which store the data on the game cartridges. That means if you get a new Wii or you want to show a friend your game progress on another Wii, you may have to transfer your game data. The Wii can transfer this data onto SD or SDHC cards, and the process only requires a few steps. Writer Bio

How to Transfer Game Data From One Wii to Another - 28