Before people start getting on the idea of Kakashi having a Hyuuga advanced bloodline implant within his other eye .. Don`t you think it would be nice to have them explain how he got the Sharingan, first?

Ninja vanish.

P.S. -- Kakashi doesn`t need the Byakugan. The more people jockin` the same techniques, the less value it has in the badass value book.