The official Nintendo customer support page states that you can update games through a local user group (no internet/wifi required). However, you must be on firmware 4.0.0 or above and you need at least 2 consoles. Press +/- on your controller and go to Software Update -> Match Version with Local Users -> Next ... I hope this works for Pokemon Games. I also don't want to be banned from updating the games (later for DLC Pokemon)