Board Thread:Theories and Speculation/@comment-30355627-20161218164138/@comment-1512913-20161224175837

Well, finally something I agree with you about, kudos. It doesn't evolve or change, they are completely separate. Even in the anime, he didn't get Mangekyou Sharingan which then transformed into Rinnegan, he awoke Mangekyou Sharingan and immediately Rinnegan as well, but it wasn't the Mangekyou which then changed into Rinnegan, they were just awakened at the same time, we just didn't get to see how the Mangekyou looks because the Rinnegan followed right after and he kept it activated.