It is possible, but you have to look up walkthroughs on how to get it. I believe it's VERY hard to capture.
In the actual story, you have to defeat Darkrai. However after that Manaphy will wan't to join the team, and he will unlock a dungeon called Marine Resort.
There is many answers to your 1 question but ill give you a simple answer go to youtube and search Pokemon mystery dungen explorers of sky getting darkrai to join your team if this doen't work email me at superteen_13@yahoo.com
after setting manaphy free, complete the following events and beating Darkrai, Manaphy will return.
You need to beat Darkrai and get Dialga and Palkia to join your team. Go to the place u evolve and wala!
You need to get Darkrai on your team and suck his &½!^
It might join your team if you battle it and win in a mystery dungeon
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.
You must get through the dark crater and deep dark crater. Then you must beat him by killing all his HP
You can get cyndaquil at Dark Crater after you beat darkrai's team.
No he's in explorers of Time,,darkness & sky
hit them and they'll ask to join your team but you never see them together in the same dungeon..veronica
a lot