+Spoilers  
  Happy Endings  (KH2)  
             In the end of the game Sora, Riku, and Kairi all come back together on Destiny Islands only to receive another letter from King Mickey.
 
  Ansem The Real  (KH2)  
            Remember the two mysterious people who created an artificial Twilight Town for Roxas? Well, these two characters are the most important characters of the game. Remember who called himself Ansem and looked like Ansem from the first Kingdom Hearts? This is actually Riku. Riku turned into Ansem after he turned to darkness for more power. He sought the power so he could take out Roxas. Riku was successful but it left him permanently looking like Ansem. The other character sitting in the computer chair most of the time is the real Ansem, "Ansem The Wise". The Ansem you faced in Kingdom Hearts was his apprentice consumed by darkness claiming to be the real Ansem.
 
  Mixed Identities  (KH2)  
            Riku looks like Ansem but changes back to what he really looks like after Ansem The Wise turned Riku back by himself.
 
  Who's Who?  (KH2)  
            Namíne is a nobody but who's nobody is she? Namíne is the nobody of none other than Kairi. The hint of this leaks when Namíne says to Roxas, "We will meet again. You may not know its me, and I may not know its you, but we will meet again... I promise!" Before the final boss battle, Kairi and Sora tell each other how they will be together. Suddenly, a shadow of both Roxas and Namíne appear and the secret is finally out!
 
  Cross Purposes  (KH2)  
            Maleficent and Pete actually join Soras side (technically) when in the final level they usher Sora and his friends along while they defeat the massive heartless invasion approaching. Of course, both Maleficent and Pete have a motive, and that is to use the castle they are in (yes, the last level is a castle) as a fortress for their own use. So technically, they are, but not to much of an extent. So do not be looking for a partnership between the two anytime soon.