Sasuke's Rinnegan is unique with six tomoe, making it superior to others in Naruto. His Rinnegan is always active due to being a borrowed power from the Sage of Six Paths.

As Naruto received the power of the Six Paths Sage Mode, Sasuke received the Rinnegan as an equivalent upgrade. The Rinnegan isn't all that easy to acquire, however.

Boruto: Naruto Next Generations explained how Sasuke Uchiha feels after losing his Rinnegan with the newest episode of the anime! The fight against Isshiki Otsutsuki might be over for now, but it ...