Yeah, NoA/TPCi/Gamestop really screwed the pooch with it. Some stores got maybe like a stack of codes at most while others got codes for days. If you were unlucky you had to call Nintendo Support to try and get one as well. :/ It's so weird because all the other code distributions had gone smoothly before.
Ah holy dang man. :L
Well they DID offer Mew for quite some time over here so maybe that's why they actually had stock for it, or it ain't as popular, I don't know actually. But yeah hope they do better everywhere with the Darkrai ones.