I can see his battle with Vergo as a zenkai boost.
As a matter of fact broken bones can regenerate growing harder and tougher than before so it doesn't necessarily take to have a boost in skill but Sanji most likely obtained that one too.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.