Originally Posted by AniMeFaN
If he thinks Hashirma parts gave him a boost to awaken the mangekeyo then he must subscribe to the theory that Kakashi didnt awaken the Mangekeyo himself
I saw it develop in both characters at the same time, if Harashrimas truly have zero bearing on Obito's eye, why zero degeneration over time, none.
Also at the same token when Sasuke thought that Naruto had died by Haku's hands, why didn't he go 3 Tomoe MS? Actually the back story on Madara and Izuna also states they evolved to MS over time in the manga.
'After developing the Sharingan, Madara and his younger brother trained against one another and eventually awakened their own version of the Mangekyou'
So basically just saying, the 1st, and 2nd (Madara/Izuna) to ever do it didn't gain MS like Obito, nor did Itachi he told us how he got his, and lastly Sasuke we know.
As stated Obito's sharingan skipped foreward past 3 Tomoe (Full Sharingan), into MS, from 2 Tomoe, that was done by nobody before or since. Harashirma's DNA had nothing to do with that though, it was simply the luck of Obito.