Board Thread:Naruto Discussions/@comment-36221354-20180717114536/@comment-6769189-20180802034808

Nightguy76 wrote: If this were the truth, Obito's Mangekyou Sharingan, when he got both of them back, was mandatorily supposed to go to the Rinnegan, as he had Hashirama's cells. Both of Sasuke's eyes were supposed to go to the Rinnegan, if this was also true. As he had Hashirama's cells pumped into his heart. These instances clearly show us that only Indra, and Asura reincarnates, are capable of Rinnegan activation. Never stated someone had to have both eyes at once to activate Rinnegan.

Obito was a Jinchuriki of the Juubi and his eye still didn't transform. Perhaps time is the missing factor when it comes to the Rinnegan.

Nightguy76 wrote:

Death doesnt stop one from being a reincarnate. Edo Madara was able to activate the Rinnegan because Kabuto modified his body with Hashirama cells
 * NB. In Sasuke's case, Hashirama was no longer an Asura reincarnate as he was already dead, and another Asura reincarnate was already alive (Naruto)

Nightguy76 wrote:

We surely know like in Madara's case, that if Sasuke had to take a piece of Naruto now, his eye would go to the Rinnegan, and he would probably lose the Sharingan tomoe in his left Rinnegan eye. Actually we dont know this at all. Nothing suggests he would lose the ability to use Sharingan over his left Rinnegan. Can be argued that his right eye wouldnt have the ability.

Nightguy76 wrote:

So a couple more questions before I close this off. Is the Sharingan required for Rinnegan activation? Half truth, but yes. In the cases of Hagoromo, Indra and Asura, and their reincarnates. The MS is required, to be more precise for Rinnegan activation. Hagoromo didnt have Sharingan or MS.

Nightguy76 wrote:

In the case of Otsutsuki's now, with the exception of Hagoromo, Indra, Asura, and their reincarnates; Is the sharingan required for Rinnegan activation? Seemingly no. For Kaguya ate the chakra fruit. Momoshiki absorbed Kinshiki. The Rinnegan is probably a dormant power of the Otsutsuki. Or just a blessing of Nature. Momoshiki had Rinnegan before he ate Kinshiki.