You can't change Shaymin into Sky Form in Pokemon Diamond (that includes pearl).
You can only change Shaymin into Sky Form in Pokemon Platinum (that includes Heart Gold and Soul Silver).
You can get the Gracidea to change Shaymin into Sky Form.
Chat with our AI personalities
You can get Shaymin in sky form only in Pokemon Platinum Version.
Actually you can trade Shaymin and Giratina to Diamond/Pearl from Platinum but if you do - Shaymin will revert back to its Land Forme and Giratina will revert back to its Altered Forme.
you could only get shaymin sky forme in Pokemon platnium in floromona town.
I don't think that is possible because the Sky form of Shaymin of Pokemon platinum was created after Pokemon battle revolution was released.
If you mean transfrom Shaymin into Sky Forme, you cant. The only way to transform Shaymin into Sky Forme is to trade it into Pokemon Platinum which comes out in spring, March 22, 2009.You cannot transform Shaymin to its Sky Forme in Pokémon Diamond because its Sky Forme is not in the programming data and the item that it uses in order to change its Forme, the Gracidea is also not available in the programming data for Diamond.