get the member pass from a Nintendo event and then go to canalave city to that locked door
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.
action replay
You do the same with the member key
In taco world
Darkrai
new moon island
you can find creselia on moonlight island but i dont know about darkrai.
The only way you can get Darkrai is to hack the game or get it from someone who went to the event.