Forgot to mention I also gave myself all the TM's, and got them again thru the game, so the ban can be because the pokédex, and or repeated items which can be obtained only once.
@YaManicKill
I was banned too. I have never used the QR island. I think the problem was the pokédex. I used pkhex and clicked on complete dex. That must have been it. You cannot get a marshadow legally or a shiny ultrabeast registered in your dex. I also clicked on give all fashion items but you can buy that and the game will detect it as bought after all...