You could try to catch other legendaries, breed Pokemon, look for Pokemon you want in the GTS...There isn't much to do after you've caught all the legendaries and beaten the game, though, so be careful not to catch them all in one day.
You can't catch Shaymin in Heart Gold or Soul Silver; it's an event Pokemon from Diamond, Pearl and Platinum. You have to transfer Shaymin from those games to have it.
Yes you can...
Yes You Do.
Event
YesYou Can Get Shaymin Sky Form In Pokemon Platinum With A Cheat Code That Is A Special Flower.
Yes, you are able to obtain Shaymin.
Shaymin is only avalible through an event, which is now over. :(
Yes, you can transform Shaymin into a different form on Pokemon Platinum.
shaymin sky from that's it
Pokemon platinum you can also get shaymin
no shaymin's sky forme is exclusive to platinum
Its for catching shaymin.