Toys R Us has announced on their Facebook page that Shaymin will be available to download starting in February at participating stores.
"Bring your Nintendo DS and your Pokemon Diamond or Pokemon Pearl Game Card to Toys “R” Us to receive Shaymin! (in-store only). PLUS… Get $5 Off ANY Pokémon DS Game title! & Get a Free Pokémon Poster!
Start Time: Sunday, February 8, 2009 at 9:00am
End Time: Saturday, February 14, 2009 at 9:00pm
Limit one coupon per participant. Limited quantities available. In-store only. "
Source:
http://www.facebook.com/event.php?eid=46936273745