Variations and Forms Mangekyo Sharingan

Variations and Forms Mangekyo Sharingan

Itachi Uchiha

Itachi Uchiha gained the Mangekyō Sharingan by allegedly killing his best friend, Shisui. With the Mangekyō Sharingan, Itachi was able to use at least three powerful techniques. With his "left Mangekyō" he could use Tsukuyomi, an extremely powerful genjutsu that allowed him to torture opponents for what seemed like days in a matter of seconds.

With his "right Mangekyō" he could use Amaterasu, a ninjutsu which creates virtually-inextinguishable black flames at the user's focal point that continue to burn until the target is reduced to ash. The last of these known techniques was Susanoo, which allowed Itachi to summon a massive ethereal warrior.

Mangekyo Sharingan

The Mangekyō Sharingan (万華鏡写輪眼; Literally meaning "Kaleidoscope Copy Wheel Eye") is an advanced form of the Sharingan that has only been activated by a handful of Uchiha.

Overview

The Mangekyo Sharingan has the ability to control the Nine-Tailed Demon Fox, although Madara Uchiha is the only one to accomplish this milestone. It also grants them access to other powerful techniques.

Sharingan

The Sharingan (写輪眼; Literally meaning "Copy Wheel Eye", Meaning (Viz) "Mirror Wheel Eye") is a dōjutsu kekkei genkai, which appears in some members of the Uchiha clan. It is one of the Great Three Dōjutsu (大三瞳術, Daisan Dōjutsu; Literally meaning "Great Three Eye Techniques"), along with the Byakugan and the Rinnegan.

The Sharingan is also called "Heaven's Eye" (天眼, Tengan), because of the many abilities it grants the user.

Stages

The Sharingan is not automatically activated in the user by birth. It is only first unlocked under some stressful or emotional condition after which the Sharingan may be used freely. When the Sharingan is first activated by a user, it has a different number of tomoe (巴) around the central pupil, varying between users.

Fūinjutsu

Kakashi using a fūinjutsu,
the Evil Sealing Method, on Sasuke.

Fūinjutsu (封印術; Literally meaning "Sealing Techniques") are a type of jutsu that seal objects, living beings, chakra, along with a wide variety of other things within another object. An imbalance is created when an odd-numbered seal is placed on top of an even-numbered seal and vice-versa.

The shinobi from Uzushiogakure in the Land of Whirlpools were specialists in the art of fūinjutsu, to the point that they were eventually destroyed due to the fear others had of their sealing techniques.

source: [naruto.wikia.com]

Resistance to Genjutsu technique

To combat the effects of genjutsu, there are several options:

The first option is for the ninja to stop the flow of chakra in their body, and then apply an even stronger power to disrupt the flow of the caster's chakra; this is called Genjutsu Release (幻術解, Genjutsu Kai). 

This can also be done by an unaffected ninja by applying a sudden surge of chakra into the affected person. In addition, tailed beasts can break their jinchūriki out of genjutsu in a similar fashion if they have a good enough cooperation, as seen in Killer B's case.