Board Thread:Versus Debates/@comment-29965012-20170112023147/@comment-734582-20170125121319

Supertinu wrote: You have a point that mainly Uchihas have rinnegan, but remember, thats plot. It's not plot. The only person to naturally awaken a Rinnegan, other than Hagoromo, was Madara. He was the only one who got the combo right. Nagato and Obito had Madara's eyes. Sasuke got his from Hagoromo. Orochimaru and Kabuto didn't realize they needed Transmigrant cells, so though they had the Hashirama part correct they lacked Madara's cells.

So the statistical data we have on the Rinnegan is: 1 person got the combo right (an uchiha) 1 person got the rinnegan (an uchiha, and the same one at that).