Board Thread:News and Announcements/@comment-26069039-20150202193409/@comment-1512913-20150202195806

Oh I get it, since the "Uchiha brain chakra" that makes one's eyes the Sharingan seemingly persist even after the eyes are pulled out, therefore indicating the special chakra doesn't get spent, Kakashi's eyes should have stayed the Sharingan after Obito entered his body. The only explanation then I guess is plot.