Depends..... are you talking about Time & Darkness or Sky? If it's the first two then get a mystery part & secret slab , put them in your treasure bag , then go to Mystifying ( spelling ) Forest & go to floor 13 . Wait a while & Darkrai should either pop through a wall or be a civilized Dark type & come through a corridor ( spelling ). You have to beat the game AFTER you beat Darkrai ! You can even find Celebi on floor 10 ! For Sky I have no clue .
lets you see darkrai in Pokemon mystery dungeon 2
Darkrai is at Miracle Sea, but you need a Secret Slab or a Mystery Part.
Darkrai
Yeah Darkrai is in the Dark Crater dungeon on floor 13
in azurills nightmare. darkrai is the one causing the nightmare and is the boss of this dungeon.
you can evolve your starter pokemon
You have to beat the game to battle darkrai.
In Pokemon Mystery Dungeon: Explorers of Sky, Darkrai can be found in Dark Crater dungeon after completing the main story. You will need to defeat Darkrai and recruit him into your team to evolve your Pokemon by fulfilling certain conditions.
go though a dungeon with cresslia and when you reach the end you will fight darkrai
Then you have to beat Darkrai.
lets you see darkrai in Pokemon Mystery Dungeon 2
Recruit everyone, explore, get Master Rank, collect items, train in the dojo, complete the special missions, restart the game...