Board Thread:Naruto Discussions/@comment-3232093-20140617193601/@comment-17623-20140818113845

MERCURIOUS wrote: Black Zetsu said that Hagoromo awakened the Rinnegan, but he didn't say that he had the Sharingan. We're speculating that Hagoromo had the Sharingan because of Madara who also awakened the same eyes.

Madara also had to get the pieces of the puzzle to make said awakening occur. The point of needing Indra and Asura chakra was to end up with Hagaromo chakra, which means he didn't have to "awaken" it so to speak as Madara had. Does this mean he was born with the Sharingan? Possible. It could also mean he was born with regular eyes that turned into the Rinnegan.

Chakra is screwy.