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well, in platinum, you get a VS RECORDER. with it, you can record either a battle fronteir battle, or a wifi battle. also, guess what. THATS THE SAME THING THAT HAPPENED TO ME! except with Diamond. all you need for now (for Darkrai) is to get to Jubilife TV. Then unlock Mystery Gift, then just get the member's card and your good. then, when you get the Nat.Dex, and meet cresselia, you can use the card to get darkrai. cuz thats wut im doin! =3