I haven't gotten a Shaymin yet, no, and I really really REALLY want one D: I kinda wanted to get one of every Pokemon, and Shaymin is the only one that I am unable to get :S (I can try to get Mew on My Pokemon Ranch if I try hard enough.. lol)
No, it isn't that Jirachi, but it does look like that one. I got mine from GameStop 2-3 years ago or something. I think the point of it was to trade it to HG/SS and it'd unlock something on the Pokewalker.
But yeah, either one is up for grabs. :D