What you have to do is go to the Pokemon site (or where else you find events) and on the event use via wirless download.KK here is how you can catch some legwndaries!
http://serebii.net/diamondpearl/legendaries.shtml
with action replay or luck
Action replay
The only way that you can et Darkrai without an action replay is to go to a Pokemon event that happens once every six months at places like argos and you get a membership card to get in the inn at canalave city.
No
no you have to get is from an action replay or go to a Pokemon event
I'm sorry but you cant capture a trainer's Pokemon without an action replay.
you need an action replay
you trade it or use action replay
only with action replay!!! there is no way without action replay
you have to migrate or use action replay
No you can not.
You use an action replay.