here,
http://pokejungle.net/2013/06/28/pokemon-game-show-announced-more/
its state
The Pokémon Company has recently issued a Press Release talking about the consequences of cheating in Pokémon. The release comes after an app that allows users to create Pokémon to transfer to their games, was made recently available in a mobile app store.
The company shuns these Pokémon created in this app (or through any other method) calling them “illegal”, saying that by using these methods of “cheating” players could potentially damage their games, and will be banned from all official tournaments if caught.
Oh boy this is serious if you use Pokegen or any program like its for X/Y and don't think the ban will be just for official tournament its can be for random and friend battle as well why do you think there's putting this PSS online system in so yeah, And plus think about this carefully they can ban you from playing X/Y online as well not just in official tournament,
But the way i see its as a possibility is this can ban your trainer card and trainer No ID number in your save file if they catch you forcing you to restart your game on a new save file with a new trainer card and trainer No ID number so you can play on Wifi again unless they force you to sign up on the GTS website to battle online but yeah,