It is only found in that form in the new Platinum.
Nothing there is no action replay code to turn Shymin into it's sky form. You just give Shymin an item that makes him transform or go to route 224 I think
Use a Gracidea flower on Shymin
get the gracida in flomora town
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.
You can't. Shaymin Sky Forme is a post-Diamond and Pearl Exclusive.
for one you can't get it in sky form you have to get it by the modifier
Shaymin sky form is only in Pokemon heart gold,soul silver, and Pokemon platinum by showing the flower shop lady a shaymin.
Even if you trade shaymin sky form it won't exist in your pokedex and you can't get the Gracidea Flower item. Sorry!
This isn't possible unless you have the Garlecia flower along with the event Shaymin.
shaymin needs to have a gracedia flower to change into sky forme but it will return to land form when it is dark or if it comes into contact with ice, im not sure if it can change formes on Pokemon pearl though
get a Gracidea in the shaymin village in a dungeon use the Gracidea on shaymin + shaymin is in sky form effect removes if your at the next floor and sky shaymin sky forme is on double speed in Pokemon diamond,pearl&platinuam you get an gracidea,go to the Pokemon league then,there!
you cant. you can only evolve it in Pokemon platinum, or by action replay in diamond or pearl