You will need to purchase the Wii LAN Adapter for that The official adapter is compatible with Wii, Wii U, and Switch Note that this will occupy a USB port on your console According to Nintendo Support, regular USB to Ethernet adapters might not work with the Wii U5,479 $1399 $1399 UGREEN Ethernet Adapter USB to 10 100 Network RJ45 LAN Wired Adapter Compatible for Nintendo Switch Wii Wii U MacBook Chromebook Windows Mac OS Surface Linux ASIX AX772 Chipset BlackThis is a perfectly serviceable USB adapter that is supported by the firmware on the Nintendo Wii U and Wii We bought two and the one hooked into the Wii U is working exactly as described The other one is for our Wii but that hasn't been hooked up downstairs yet I
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