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I'm not sure where it is in Platinum, but if you give it a heart scale then I can just do it myself. What do you want for them? I can just give you something random from my thread, that's in my SS game...
All I need is a male Roserade, and they learn Weather Ball as a Heart Scale move. Nature and IVs don't matter. I also need any Qwilfish, its IVs and nature don't matter either.