Ok thaks. I'm sorry if I ask so much, the thing is that my last Pokemon game was the Pearl version and since then, I lost contact with pokemon, until I decided recently to buy the Pokemon Y and the 3DS XL. So I don't know so much things. Anyways, since here's not the place to ask about all, I've started toread a lot. But thank you very much. I can think clearly now lol.
One last thing related to the patches of the pokemon games: for instance, if I have 2 SD cards (A&B) and I update the Pokemon Y in my friend's updated software of the 3DS, I will get the latest Pokemon patch in A. And, if I put A in my 3DS, I would have the latest patch still. In the other hand, in B, if I don´t update, I would still have the same 1.2 patch of Pokemon Y, and I can switch in-between the SD cards (A&B) without losing any progress of my save data, as well. Is that correct? If I got it, the patch seems to save in the SD card, not in the 3DS itself?