So in KH1 it is what Ansem SOD was looking for(right? lol haven't played it since it came out), in KH2 it was going to be used by the Organization to give them hearts, but in Birth By Sleep it's used for.... I mean in all of the side games(Com, Days, and I guess coded) Kingdom hearts wasn't really talked about, and had nothing to do with those games, I haven't played coded so I'm not sure if it has anything to do with that game. Also, Birth By Sleep is a major game when talking about story so I'm not sure this can be called a side game. Anyway in Birth By Sleep MX shoots that ball of light/darkness/whatever into the sky and Kingdom Hearts appears. But what does that have to do with anything?
So in KH1 it is what Ansem SOD was looking for(right? lol haven't played it since it came out), in KH2 it was going to be used by the Organization to give them hearts, but in Birth By Sleep it's used for.... I mean in all of the side games(Com, Days, and I guess coded) Kingdom hearts wasn't really talked about, and had nothing to do with those games, I haven't played coded so I'm not sure if it has anything to do with that game. Also, Birth By Sleep is a major game when talking about story so I'm not sure this can be called a side game. Anyway in Birth By Sleep MX shoots that ball of light/darkness/whatever into the sky and Kingdom Hearts appears. But what does that have to do with anything?