Board Thread:Naruto Discussions/@comment-30168130-20170214195224/@comment-17623-20170216111919

I believe Kaguya possesses Six Paths Chakra, and that is the basis of literally everything that makes Six Paths anything unique.

Truth-Seeking Balls? Six Paths Chakra.

Six Paths Senjutsu and Six Paths Sage Mode? Six Paths Chakra mixing with the use of Natural Energy in a way a normal human can use.

Rinne Sharingan?: Six Paths Chakra.

Sasuke being a dick? Sasuke being a dick.

See it all fits.