According to Nintendo Support, users can link their Nintendo Network ID wallet for Wii U and Nintendo 3DS systems with their Nintendo Account wallet for a shared balance to purchase any content until March 27, 2023. Unfortunately, the balance will revert toward Nintendo Switch system purchases once the date arrives. Nintendo eShop Wii U and 3DS cards that are still in circulation will still be supportable while supplies last. Following March 27, all eShop cards can be added to a Nintendo Account balance for Nintendo Switch systems.
Additionally, these changes will not only simultaneously affect the Nintendo eShop on Wii U and the Nintendo 3DS, but other software where users can make purchases like StreetPass Mii Plaza, Theme Shop, and Nintendo Badge Arcade. That said, users will still be able to receive software updates, use online play, and even re-download games and DLC in the future. Again this likely only affects games already purchased.
The Wii U and 3DS brought forth many ups and downs for Nintendo, even so, many fans still hold love for these consoles for the memories that they made. In celebration of the life of these systems, Nintendo created website for fans to look back on what made them so special.
For more information on the Wii U and 3DS eShop’s closing, visit Nintendo Support’s article and Q&A here.