Forum:NEW CARDS!

Hi, I was just wondering if I can use Sin monsters or rather Sin deck. You see here in our place (Part of Southeast Asia) cards that are not even released yet (cards that are still in Japan) are already being sold here. I don't know where they get it but it's like original. From names, types, attributes, till the card number and even its description is all correct! So last weekend I bought about 3 booster boxes. 1 booster box has Majestic Red Dragon as its cover card. The other one was Cyber Dragon Zwei as its cover card and the last one was that ritual monster in the Absolute Power Force Booster Pack. When I unwrapped my booster boxes the cards are not even Absolute Power Force cards. Only some but many are Shining Darkness card. Some are even Sin cards. I already have many Sin monsters. I'm trying to collect more. The day after I bought my booster box, I eventually started creating my Sin deck. My classmates are so pissed off of my new deck because Sin monsters are very easy to summon! So I'm just asking if my Sin deck will be valid for tournaments. If not, I still have a reserved deck..............xDDD