if you go to canalve city and check all the houses and the one that is stuck tight make sure you have the members card with you and go to the house that is stuck tight then you go in and then go to sleep in the bed then after that you will appear in new moon island were you can catch darkrai IT'S A LEGENDARY SO USE A MASTER BALL!!!!!
With the Japanese event or mystery gift
the member card
action replay
wonder card is when the Pokemon staff somehow give you a way to get a mystery gift. Right now if you go to toys R us you can get an arceus. He will be a wonder card, meaning he is a mystery gift. You go to mystery gift and choose receive via wireless communications when you are in toys r us, and you should (if you're standing in the right place) get a wonder card with arceus. Before arceus, there were wonder cards with regigigas, the secret key for rotom, oak's letter, and others. These events have expired, and there is one event at a time
they have 2 have dun a live event and have a card link and go to a poke mart and volla you have a mystery gift:)
at a Nintendo event
You can get it through the Nintendo wifi.
Mystery Gift or using Action Replay
you have to get the members card from mystery gift.
you have to obtain the members card through mystery gift.(it may be possible trough AR.)
Not without cheating
With the Japanese event or mystery gift
There is not code to get one without amember's card. Well there is. Go to mystery gift and search
the event is over but you used to be able to get the members card which allows you to catch darkrai you can still get the members card with action replay
It comes with the Mystery gift...
you get it through Nintendo event or mystery gift on Pokemon pearl platinum or diamond
By Mystery Gift,by Wi-Fi.Hurry,it stops near September 18.