i think duel wielding unknown is the shell of the bhk. The same thing that happened to sora (when he became a heartless) most probably happened to the bhk. For those of you that dont know my theories on the game i may as well update them....sorry ouch, you've probably heard them a thousand times :P

I think that all the unknowns were previous keybladers. Think about it. The infromed people (ansem, mickey, leon ect.) would never have known about the keyblades existence if it hadn't been recorded from another time. it may be centuaries before this games happenings but maybe that explains the unknowns being so desperate that sora has come along. this may be there chance to either die properly or be reunited with there hearts.

I also think that they were taken from there bodies the same way that sora was when he unlocked his heart (they may not unlocked there heart but something like they had there hearts taken. Now your going to say then why arent there unknowns for every heartless victim in the world and i think the answer to that is, because the unknowns are all such great fighters that there shells couldn't give up looking for there bodies and were taken into the organization.

Peace out and :rock:
EE