Board Thread:Naruto Discussions/@comment-29965012-20170125022543/@comment-1512913-20170127213026

It means he has complete understanding of and mastery over chakra, that's all, but otherwise his IQ isn't any higher, chakra is just first nature to him, hence all nature transformations.

He can in theory use almost any technique. But of course that's not gonna happen, cause he loves balls and copies of himself with even more balls too much.