Board Thread:Naruto Discussions/@comment-36221354-20180717114536/@comment-33286580-20180717213837

this one is really complicated.

leaving the anime aside, only Madara and Sasuke awakened Rinnegan and both had Sharingan. even the anime shows that Hagoromo possesses Sharingan.

the thing that further supports it is the Tenseigan. TOneri specifically took Hanabi's eyes to awaken Tenseigan. one could argue he did so because he was blind, but so was Madara in one eye after Izanagi and yet he activated Rinnegan so blindness should not be a problem. toneri could have simply attained some flesh or chakra of a Hyuga and achieved Tenseigan, but he did not.

the thing though is that it is stated that one requires Chakra of Asura and Indra to activated Rinnegan. as in their chakra combine to form the chakra of Hagoromo.

but here is the kicker. Asura recieved his body from Hagoromo and Indra his eyes. in the end to awaken Rinnegan we need Hagoromo's chakra, so we should assume that we would need what Hagoromo's children recieved from him. in this case the eyes of Indra, as in the Sharingan.

So, Sharingan is a must in a sense.

because if Sharingan wasnt a must than Naruto should have awakened the Rinnegan. he recieved Hagoromo's chakra. and no, nowhere is it stated that he only recieved the Yang version. because with only Yang the Goudodama would not be created.