But i have good news. I inserted Shaymin Sky form but just so you know, the Glacidea Flower would be useless in S.P because Both forms would be inserted over different Pokemon. But nevertheless I have found an idea. How about using it to "evolve" Shaymin from one form to another? Like this:
Shaymin Land evolves to Shaymin Sky, then Shaymin Sky evolves to Shaymin Land, and the process continues.