I dont know where the theory place is so I think ill put it here.Also im sorry if anyone else made this theory.
Theory:
When Sora and Roxas fought,Roxas said "Tell me why he picked you!"
That could mean the Keyblade doesnt chose its weilder it could be one of the knights and the reason I think that is because the bald guy and his assistant fought the knights and he wouldnt fight them for no reason,so the bald guy could of attacked them so he could not be stoped and he could take over Kingdom Hearts.
Theory:
When Sora and Roxas fought,Roxas said "Tell me why he picked you!"
That could mean the Keyblade doesnt chose its weilder it could be one of the knights and the reason I think that is because the bald guy and his assistant fought the knights and he wouldnt fight them for no reason,so the bald guy could of attacked them so he could not be stoped and he could take over Kingdom Hearts.