Board Thread:Theories and Speculation/@comment-5273810-20150207055437/@comment-5547501-20150207061335

I though it was one of those 'senju cells beat all' type deals. Obito had Hashirama's cells attached to him by Madara whilst Itachi and Sasuke didn't. While your theory is interesting, doesn't Kakashi say when Guy is fighting Madara that his eye was nearly blind and he needed to be nearby to Kamui? One thing to realise about this is Kakashi, like most other sharingan users, did not possess Hashi cells.