Cheating? you can have up to 9 of any cards in the current format. 4 regular/delta/Lv. X versions of the card, 4 ex versions of the card and 1 *(star) version of the card. However, you can only have 4 total of a pokemon, its delta form, and its level X form. Plus, for non-modified play, you can also have 4 of the card if it has an owner in its name (eg Team Aqua's Cacnea).