Board Thread:Episode Discussions/@comment-25319479-20180531110046/@comment-734582-20180604142806

Jason of the Mangekyou wrote: Wasn't it supposed to ;_; i mean he awakened it, not had it transplanted onto him '-' like in nagato's case It's implied that the Rinnegan is an actual physical eye, rather than a power that activates/deactivates like the Sharingan. Note that the ripple pattern is all over the eye. The only real case where we saw someone change it was with Edo Madara, and even that was switching between Sharingan/Rinnegan (something Sasuke doesn't have to do).