Itachi Uchiha Mangekyou Sharingan Pfp Kisame forces itachi to activate mangekyou sharingan obito spies on itachi from behind welcome to the channel of smn

Plus sharingan is activated when the wielder is affected by negative emotions deeply and then the chakra affects the optic nerves and poof why didn t kakashi use mangekyou sharingan against itachi when they fought in naruto