Access the Wii Shop Channel through the Wii console, or the Nintendo DSi Shop through the Nintendo DSi, and then redeem Nintendo Points to download additional games, features, and items (subject to availability).
Points are valid for use in the United States and Canada and may be used on either the Nintendo DSi or Wii systems. Points have no monetary value and cannot be redeemed for cash. All points and software downloads are only for use on a single system and are non-refundable and non-transferable and may not be divided between Nintendo DSi and Wii systems. A maximum number of un-used points can be stored on one system.
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