Let me explain, I've had numerous people ask me about that. To EV train my pokemon I search for swarms of pokemon (mainly Absol and Lickitung) and to find these swarms I have to reset the DS' internal clock to 23:59 so that I can get a new swarm sooner. The reason the Shaymin's obtain date is 6.6.2009 is because that's the time my DS had when I recieved it from the event. All I did was forget to change my clock before getting the shaymin so it's a fault on me, sorry. But I assure you that the Shaymin is 100% legit, it's just a little wierd is all.