PiiU
Virtual Console
Note that the availability of these games will be different depending on your country. You can upgrade games you bought on the Wii for a fee to use them with Off-TV Play on the Gamepad. Typically, most will support the Gamepad, Pro Controller, Classic Controller/Classic Controller Pro, and Wiimote. Otherwise, most apply as they normally do on the Wii. For NA, check availability HERE, EU checks HERE, and JP checks HERE.