The final stage of the sharingan is the eternal mangekyou sharingan, the difference between actually the right answer is how did sasuke get his eternal mangekyou sharingan,because he didn't kill anybody to get it.after killing itachi,tobi transplants itachis.
Sasuke Eternal Mangekyou Sharingan Episode / A mangekyo sharingan is distinguished from a normal sharingan by its appearance, which change the form of the tomoe seal.
