Yes, it is.
>In Pokémon Black and White, if a fateful encounter Shaymin is imported from a Generation IV game, it can get the player a Gracidea from a woman in Lacunosa Town's Pokémon Center. Bulbepedia
Hope This Helped :D
It is in Lacunosa town (or however yoou spell it) in the pokemon center and a lady gives them to you if you have shaymin in your party
Hope This Helps! :D