You need your hands to hold the device. So a special gadget would be needed that transforms the mobile into something that looks like a PS Vita so that you can hold both the screen as well as the gamepad. This obviously means that a Wiimote cannot be used. Also, you'll look like a dork IMO walking around with a gamepad on your phone :-/ This might be acceptable for a 16 year old...AFAIK most mobiles provide USB slots which can be used to connect gamepads. Wiimotes can theoretically be connected via bluetooth, however I'm not really sure if anyone tried that or if it's even meant to be supported yet.