New Wii U update lets you transfer data to a new console
Wii U firmware version 5.1.0 U adds the ability to transfer save data from one Wii U to another, provided both consoles are present.
The data transfer completely overwrites the receiving system’s storage. The feature’s FAQ shows that “save data originally created on the target Wii U will no longer be available after the system transfer is completed, even if it is stored on a USB device.” Fortunately, externally stored data taken from the original system will be accessible on the target Wii U.
To complete the transfer, you’ll need both Wii U consoles, an SD card capable of holding all system and save data and a network connection allowing both systems to be connected. The feature can be accessed through System Settings.
The update also allows eShop navigation via Wii Remote and Wii U Pro or Classic controller, as opposed to limiting the store to the Gamepad.