Shaymin is event-only, so you can't get it in Soul Silver unless you trade it from another game.
trade it to platinum to get its sky forme, and back to DP to get its land form
You need a Gracida Flower.
you cant in any game such as pearl diamon plantium heatgold and soulsilver
Talk to one of the Shaymin in the village. At the top-right, I believe. It'll give you a Gracidea, which changes Shaymin's forme when used in a dungeon.
You have to have platinum and get the Gradecia from the lady in Floraroma. THen during the day time you can make Shamin turn into its Sky Form.
give it the gracida flower
by the way you spelt shaimin rong it shaymin. go to event to get it on diamond or pearl then trade it to platinum. to get sky form (on platinum) go to floroma. talk to woman with blonde hair. she giv u gracidea. use this on shamin during the day and he change form. shaymins only sky form during the day and turns normal at nite. use gracidea again on shaymin the following day he become sky form again!
they can.
You can't catch Shaymin in sky form, but you can find the land form and then change it. You can find Shaymin in land form in Flower Paradise in Sinnoh. Flower Paradise is an event-only area and you'll need Oak's letter (which is an event item). After you've caught Shaymin in land form, you need to visit the Flower Shop in Floaroma Town. A blonde woman near the Flower Shop will give you the Gracidea Flower. If you give this to your Shaymin, it will transform to sky form. However, it can't stay in sky form during the night, when he's in a PC or when he's frozen.
Ok. How far do you know pokemon? I am pretty sure that shaymins do NOT evolve, but they can transform into flying form. Ha ha. Another question answered by Scaric101
You can teach it that in the battle frontier in HeartGold and SoulSilver OR breed it Sky Attack.
Any Shaymin can, it's more a matter of getting the Gracidea. To do it legitimately, you need to obtain the special event Shaymin from the movie and talk to the lady in the center of Floaroma. Actually no you can't. I have multiple Shaymins, one from the event, and the Gracidea flower doesnt work on the non event Shaymins. I tried it myself.