Nintendo Wii / Wii-U Ethernet
Objective:
Nintendo Wii Wired Ethernet Connection
Pete's Pick:
Plugable USB2-E100 USB 2.0 10/100 Fast Ethernet Adapter ($16)
Discussion:
Nintendo officially supports one USB Ethernet chipset for the Wii and Wii U, the ASIX AX88772. That's what is inside the discontinued Nintnedo Wii LAN Adapter (RVL-015) and I believe any adapter that is Wii or Wii-U compatible.
There are plenty of 3rd party clones of the official adapter often replicating its Wii "cube with cut corner" shape. All official and unoffical Wii-support Ethernet Adapters support USB 2.0 and 10/100 Fast Ethernet speeds that will outperform the WiFi available on the Wii (802.11g) or Wii-U (802.11n). While supported, this device is not the best USB 3.0 gigabit ethernet adapter for Nintendo Switch.