You have to get a members card from the man in the pokemart wearing green then in canrvale city at the back of the Pokemon center you go in there and a man is waiting for you and you go to the bed in there and wake up on new moon or full moon island not sure and then you follow the trail and then you go into the trees and there is darkrai hope it helps
You have to have an action replay to get to Darkrai.
If you get Darkrai via a event on platinum it will be at lv.50
No.
Ok the answer is yes, but only throught the darkrai event
you can not catch Darkrai in platinum you can only get it at special events or you can go to GTS and trade someone for it the last option is to get from a friend or use a master ball on a wild Darkrai or on someones caught Darkrai.
You do the same with the member key
new moon island
In taco world
action replay
Darkrai
The only way you can get Darkrai is to hack the game or get it from someone who went to the event.
you can find creselia on moonlight island but i dont know about darkrai.