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If Itachi didn't kill Shisui, how did he really awaken his Mangekyou
Sharingan?


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2013-03-20T10:40:31.717
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2016-03-18T11:45:31.713
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question
naruto
How did Itachi awaken his Mangekyou Sharingan?


The Mangekyou Sharingan is activated once its user experiences great loss,
especially of someone close to him.  
This means that Itachi did not have to kill Shisui in order for the Mangekyou
to activate. What is most important for the activation is that the user
_feels_ the loss, which causes their brain to release a special kind of chakra
that affects their optic nerves (chapter 619), thus awakening the Sharingan,
and the Mangekyou, depending on what 'level' you were before, and on how much
loss you have experienced. The more loss you experience, the more powerful the
Sharingan gets.

Probably, just witnessing Shisui's death to protect the village was traumatic
enough for Itachi to awaken his Mangekyou.  
Also, if you remember, Sasuke's Mangekyou activated when Itachi _died_. He did
not kill him either, but witnessing his death, even though he hated him, was
traumatic enough to activate it.


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2013-03-20T11:32:08.460
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That may be true, but that's not how Sasuke got his Mangekyou Sharingan. In
the episodes following the fight, we learn that Itachi implanted his Mangekyou
powers (Amaterasu, etc.) into Sasuke. Those powers activated when Sasuke
looked at Madara's Sharingan; as Madara explained, Itachi made the abilities
self-activate when they came into contact with Madara's Sharingan. This was
because Itachi did not want Madara and Sasuke to meet, in order to prevent
Madara from telling Sasuke the truth about Itachi.


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