Originally Posted by Uchiha09
itachi's MS pattern only activated when he saw madara because sasuke didn't have MS AT ALL at that time and so he needed a MS to use amaterasu and that's it. sasuke cannot replicate itachi's eye pattern at will or ever. it's just when he sees madara's sharingan
OK, what your saying is true, but here's a few other things to think about.
1) You can't use MS techs without a MS. That explains why Itachi had
to give sasuke a replica of his MS.
2) Itachi gave him Tsukuyomi and Susanoo too, neither of which were set up automatically. Itachi had to have foreseen a way for sasuke to
3) Sasuke's got his MS right after the fight. Whether or not he could have used itachi's MS we will never know. Once he got his own there was no point.
4) You have to consider Itachi's actions. Why did he give sasuke all his MS techs? If Ama was to kill madara, then why the give him the other 2? Did Itachi foresee Sasuke getting his own MS? If so why bother giving him his to begin with. Itachi doesn't do things without a reason.
Here's my theory. Itachi knew about the blindness caused by MS. He actually loved his brother and tried ( in his own twisted way) to make sasuke stronger. So it doesn't make since he would want sasuke to go blind too. That's when he developed a alternative way to give sasuke his MS and techs. Because sasuke didn't awaken it himself the gradual blindness doesn't occur. What he didn't plan on was sasuke awakening his own MS, or did he hmmm. Itachi said himself that only if he had the EMS could he surpass Madara, so it makes since that he would want sasuke to have it.
If he already had itachi's MS and then got his own, it is possible he has EMS. He just did it in reverse order from madara. BTW, if madara and his brother both awakened their MS at the same time, why didn't they both go blind?
Now that's a mystery.
I did a little research into Sasuke's "new power" and found something Itachi said.
Notice when he says the "the transplant gave birth to a new eye technique". That also hints that sasuke might have the EMS.