Sorry mate, you can't get it on pearl. It's a Pokemon Platinum item only, you can find it in platinum if you talk to this one lady by floaroma town with shaymin in your party.
Sorry I couldn't help much =/
This is a rumor of how to get it.
There is no way. If u enter the trading room the shaymin will become normal and plus its a key item so u cant hold it.
I don't think any particular slot in your party, just go to Floaroma Town and talk to the lady next to the flower shop in order to obtain the Gracidia Flower. Hope this helps :)
You cant make it work. You have to have the original shamin you got the Gracidia Flower from.
You CANT but you could get the gracidia flower.Talk to the lady in flamora town if you have shaymin in your party she gives you the flower then use it on shaymin and it will turn to sky forme.ps dont trade the shaymin from a diamond or pearl game and try to get the flower i tryed and it didnt work.
A "Gracidia Flower" is what makes a Shaymin turn into its sky forme.
By taking shaymin to the flower shop in goldenrod city.
the shaymin in your party has to be a legit shaymin. not only that, you only recieve the gracidia flower if you enetered the wifi event. otherwise simply trade the legit shaymin to heartgold or soulsilver, then with it at the front of your party you must go to the woman who gives you the squirtbottle in goldenrod city. she will give you the gracidia flower, but it can only be used during the day. i think 8 am to 5 pm.
She probly won't give it to you because you need to have shaymin in your party. Then she will give it to you.
It's actually really easy to get the gracidia flower in Pokemon SS&HG you just bring a legit event shaymin to the flower shop in Goldenrod City and one of ladies will give it to you for free. If you have a non-legit shaymin that's probably why you're asking this question. Find it from a website like Pokesav or Cheat code central or i bet they have it on Action Replay.com
event
give it a gracidia flower.