OMG, THE NIGHTMARE IS ACTUALLY OVER! THIS IS THE WORST KINGDOM HEARTS GAME I'VE EVER PLAYED! I HAVE NOTHING ELSE TO SAY! FRIG OFF!
So, Riku's story explains how he and King Mickey got the Organization's cloak, and what happened to some of the Organization members. And about Riku learning how to deal with the darkness. It's a very short story.
I give this game (Kingdom Hearts Re: Chain of Memories) a 2/10. Go watch the cutscenes on YouTube because frig this game.