Board Thread:Naruto Discussions/@comment-25132842-20180206105055/@comment-30323490-20180206115015

There were only 2 recorded Mangekyo transplants between Uchihas: Madara and Izuna / Sasuke and Itachi. In both cases, the receiver already was an MS user. During their fight, Itachi wanted to "steal Sasukes eyes" in order to obtain EMS, and Sasuke was only using regular sharingan.Yet at that point, Itachi was bluffing a lot, so we don't really know if that would've worked. So it's unsure to say what would happened if a non-MS user would receive some tired MS. The other thing is that on both cases, the transplant happened between siblings. It's also unsure if the participants must be siblings or not. I'm assuming not tho.