Board Thread:Questions and Answers/@comment-24919788-20140509022515

Quote the Zanpaktu page "No Zanpakutō in existence has a Shikai and a Bankai which use unrelated abilities"

what about Unohana's Zanpaktu.

if im not mistaken in her zanpaktus shikai it transforms into a flying animal with healing power and in bankai it becomes a killing weapon not alot different than Zaraki's Zanpaktu.

im not completely sure but that seems unrelated ability wise :P 