Go here to read on KH2:
http://en.wikipedia.org/wiki/Kingdom_Hearts_II
Also here is a good theory ya'll find when u read bout BHK:
It is possible that because he is the other side of Sora's heart, his name may be the japanese term for earth or ground, considering Sora's name is the japanese term for sky.
http://en.wikipedia.org/wiki/Kingdom_Hearts_II
Also here is a good theory ya'll find when u read bout BHK:
It is possible that because he is the other side of Sora's heart, his name may be the japanese term for earth or ground, considering Sora's name is the japanese term for sky.