Board Thread:Versus Debates/@comment-29769110-20170706085223/@comment-32548114-20170711183106

There appear to be a couple of things that people are not taking into consideration, and thus I will address them here.

The undisputed winner would be Obito. Here is why:

Nagato has the powers of the Six Paths with his Rinnegan. Throughout the entire anime, Nagato has almost exclusively been seen using techniques that are linked somehow to his Rinnegan. His control of the five basic elements also comes from the Rinnegan, despite his rare usage of them.

The original poster of the question gave us the following scenario: Obito has his left eye as the Rinnegan (we can only assume that he also gives him his standard right eye, the Mangekyou.) and his form from the beginning of the war. Nagato is with us at his full power, with both of his Rinnegan in a living, non-reanimated state.

Because Obito has the Rinnegan as his left eye, he has ALL of the same abilities that Nagato has. Referring to the wiki, one can see that the Rinnegan grants him access to all of its techniques. Obito was only seen using the Outer Path, but that does not change the fact that he can use all of the techniques associated with it.

Obito has access to the five basic elements and Yin-Yang release. On top of that, since his body is mostly composed of White Zetsu matter, Obito's chakra reserves are amplified. He's also got access to Wood Style ninjutsu. His body, and his years of experience fighting shinobi of various caliber gives him quite the advantage of Nagato.

Then, the final nail in the coffin, so to speak, is the Kamui. Obito's ability for inter-dimensional travel alone would have allowed him to defeat Nagato. His battle prowess gives him the tools necessary to defeat Nagato without using Six Paths techniques (Example, Nagato launches a missile barrage at Obito. Using the Kamui, Obito closes the distance and gets in range to warp Nagato away, letting all of the missiles pass through him.)

The only real techniques that could trouble Obito would be the dragon Nagato used on Hanzo's men, or the Planetary Devastation, but Obito could easily warp away in time to avoid both of these techniques. We must also keep in mind Obito's desire to stick to the Eye of the Moon plan. He is most likely willing to do whatever is necessary to win that battle, even sacrificing his right eye for the Izanagi. There is simply no possible outcome with Nagato as the victor against the skill set employed by Obito.