by eating cheese!!!!
you need to get a Nintendo event
If you are talking about the one in Canalave City, which is the only one I can think of, you have to go to a special event and get a key. Inside is where you can find darkrai.
You have to get the member card event.
You need action replay or go to an event if you want to do this.If you open the door rest into the bed.You'll be on new moon island.enter a little doorway,then...you'll see Darkrai!!
You needed to obtain the mystery gift "Member Pass" from an event. This event allowed you to go to full moon island to catch Darkrai.
Members pass event if you dont have it then you won't get in
in an event, you have to get the member's pass then go in the locked harbor at the top of canalave city above the pokemon center.
You need a special event item - a Member's Card, to be able to get in. The event is how you get Darkrai, provided you didn't trade it over from Ranger.
you need to get a Nintendo event
If you are talking about the one in Canalave City, which is the only one I can think of, you have to go to a special event and get a key. Inside is where you can find darkrai.
Get event on action replay.
you need to catch the event that gives you the membership card,go to the locked house in canalave city and talk to the man and catch darkrai!
get the member pass from a Nintendo event and then go to canalave city to that locked door
You have to get the member card event.
In the Pokemon generation four games, there is a locked door in Canalave City at the Harbor Inn. This can only be opened with the Member Card which can only be obtained through an official Nintendo event.
You need a Member's Card, which is an event item. Inside the house, you go into a bed and go to sleep and fight Darkrai at New Moon Island.
I don't know who darkria is, but to get Darkrai in Pearl, you have to go to an event somewhere and download the Membership card then you go into the inn in Canalave... I'm not revealing the rest, you'll find it out if you go to an event!