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As we know, there are only two who have achieved the **Eternal** [Mangekyō
Sharingan](http://naruto.wikia.com/wiki/Mangeky%C5%8D_Sharingan).
[Madara](http://naruto.wikia.com/wiki/Madara_Uchiha) and
[Sasuke](http://naruto.wikia.com/wiki/Sasuke_Uchiha).

**Madara**

Madara and his brother both gained their MS from killing those closest to
them. Madara then gained the EMS when he took Izuna's (his brother's) eyes,
who had the MS.

[![enter image description
here](https://i.stack.imgur.com/nPCoim.png)](https://i.stack.imgur.com/nPCoim.png)

**Sasuke**

Itachi gained his MS when he witnessed Shisui die. Sasuke gained his MS when
he learned the truth about Itachi from Tobi. Sasuke then gained the EMS when
he took Itachi's eyes.

[![enter image description
here](https://i.stack.imgur.com/V23p0.jpg)](https://i.stack.imgur.com/V23p0.jpg)

**Question**

When Itachi was fighting Sasuke, he was saying how he wanted to take Sasuke's
eyes so he could obtain the EMS. Sasuke did not have the MS at the time, so
was Itachi lying, or are just "blood tie" Sharingan needed for the EMS?
***Sidenote** I personally don't believe Itachi would lie about this, because
if he did and Sasuke found out, Sasuke would then be questioning Itachi's true
motives.

Does anybody have any proof that you _have to_ have the MS in order to awaken
the EMS?


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naruto
Can the Eternal Mangekyō Sharingan be obtained by implanting a normal Sharingan?


Here's a simpler thought: you can't obtain something greater if you have
something lesser to offer.

We know that obtaining the Mangekyo Sharingan requires someone to witness
someone close to them being killed or lost. Some of the more prolific wielders
obtained this by killing someone close to them, with the notable exceptions of
Madara and Itachi who only witnessed someone close to them die.

One of the changes when someone with the Eternal Mangekyo Sharingan undergoes
is that the _tomoe_ of the _previous_ MS wielder is blended in with their own
as a secondary pattern, similar to how a kaliedoscope blends in multiple
pictures. This is evident with the final look of Sasuke's own EMS.

[![enter image description
here](https://i.stack.imgur.com/rqt8g.png)](https://i.stack.imgur.com/rqt8g.png)

With that, it makes sense that a prior Sharingan would have **needed** to have
been an Mangekyo, since there wouldn't have been a new _tomoe_ pattern to
include into the kalideoscope.


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answer


Note that I am leaning more heavily into addressing whether this is a plot
hole than actually answering whether Eternal Mangekyō Sharingan requires
transplanting Mangekyō Sharingan (though I try to answer that too).

There's a point here that I don't see anyone making, and it's this: Sasuke was
supposed to have a Mangekyō Sharingan when he came into this fight. Itachi
repeatedly told Sasuke he needed to have the same eyes as him if he wanted any
hope of defeating him. In other words, Itachi tried to set the stage so that
the conditions for Eternal Mangekyō Sharingan would be met.

We all know what Itachi's true motives were, and that he didn't actually want
to take Sasuke's eyes, but let's look at this a different way. I'm going to
write about the character Itachi was playing--in other words, the act he was
putting on. This Itachi is power hungry and wants the Eternal Mangekyō
Sharingan for the sake of increasing his own power. But not only that, he
needs it because he's going blind from using his own Mangekyō. He's desperate
to avoid losing his light. He tells Sasuke to kill his best friend and achieve
Mangekyō Sharingan, all for his (Itachi's) own sake. And he waits, even after
Sasuke gains a regular Sharingan. This is ostensibly because stealing a
regular Sharingan is not good enough for Eternal Mangekyō Sharingan.

Fast forward to the battle between Sasuke and Itachi. Itachi is really on a
dire strait at this point. He can barely even see. In other words, he really
needs to take a chance. He needs to take that Sharingan, whether or not he
still gets that Eternal Mangekyō Sharingan in the end. He still hopes that he
will, of course, but he's out of time.

Now, coming out of the act once more. We might consider that Itachi had
planned out this battle very carefully. There's evidence for this--afterwards,
we learn that he drew out the fight specifically so he could destroy the part
of Orochimaru inhabiting Sasuke. Itachi also needs to make sure his secrets
are buried with him after he dies. Thus, it wouldn't be too far-fetched to say
that Itachi had a script in mind. And he probably had the basics for this
script planned out for years. But perhaps there's one thing he didn't account
for. And that would be Sasuke not achieving Mangekyō Sharingan. So, what's he
supposed to do? His script largely requires himself to be trying to take
Sasuke's Sharingan. Does he just rewrite the script? There's no time to think
of anything different. What would his new character motivation even be in that
case, if not to achieve Eternal Mangekyō Sharingan? What he had planned out
will simply have to suffice. Any contradictions can simply be explained as his
desperation for replenishing the light in his eyes.

So, the question that's being asked: Does one need to take a Mangekyō
Sharingan from a blood relative to achieve Eternal Mangekyō Sharingan or will
a regular Sharingan suffice? There are too few cases to know for absolute
certain, but there is some evidence to suggest that you do need to take a
Mangekyō Sharingan. The main evidence, of course, is simply that Itachi says
so (I'd like to actually find where he says that and cite it if I can. The
Wiki at least seems to confirm this: ["Their vision can be restored by
transplanting the Mangekyō Sharingan of an Uchiha with strong blood ties —
ideally a sibling — thus awakening the so-called Eternal Mangekyō
Sharingan"](https://naruto.fandom.com/wiki/Mangeky%C5%8D_Sharingan#Eternal_Mangeky.C5.8D_Sharingan)).
So Itachi contradicts himself in the fight with Sasuke? Doesn't matter,
because in reality he had no intention of actually taking Sasuke's eyes to
achieve Eternal Mangekyō Sharingan. It was just an act he had to see through
to the end.

As for the opposite conclusion, with only two cases, at best we can say that
from an in-universe and out-of-universe perspective, it is simply uncertain
whether a regular Sharingan would work. But the only lore we have states that
Mangekyō Sharingan is required, so we should probably lean towards that
conclusion.


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