Well I am a big fan of the shell idea but not all the way. I don’t think that BHK is sora's shell I think that diz is the shell to BHK, that’s why when BHK tried to hit him with the keyblade it when right though him maybe the person who made the shell cant hurt it. I do also believe sora dose have a shell just not BHK I think that axel knows who is sora's shell b/c when vexon was going to spill the beans to sora axel killed him. Shoot it down set it up idc!