Originally Posted by Minorin
The Shiny Shaymin is a hack. There were no legal distribution's of Oak's Letter before September of this year. The date on the Shaymin you gave me says May 15. You don't have to trade me back anything, but I suggest you remove it from your shop. Hope this helped.
The games DS date was wrong when obtaining the Pokemon.
Although this reduces the rarity, its still legit.
Would you like anything from my list if you really think its hacked?
Thanks for telling me though. :)