Uchiha Shisui possessed outstanding ninjutsu abilities, which earned him the nickname "Shunshin no Shisui" — "Shisui of the Body Flicker".
Body Flicker Technique (Shunshin no Jutsu)
Shisui's primary specialization, which made him legendary. Thanks to his exceptional mastery of chakra control and proficiency in all five basic nature transformations, he could travel vast distances, leaving behind only a green trail. His movement speed was so great that opponents could not even perceive his movements.
Nature Techniques
As a true member of the Uchiha clan, Shisui excelled in Fire Release. His signature technique — Great Fireball: Flame Control Fire Release (Katon: Gōka Mekkyoku) — created a massive wall of flame capable of destroying multiple targets simultaneously. He also used the clan's classic techniques: Great Fireball Technique and Fire Dragon.
Mangekyō Sharingan and Unique Abilities
Awakening the Mangekyō Sharingan granted Shisui access to one of the strongest techniques in the world — Kotoamatsukami. This unique genjutsu technique allowed him to implant any thoughts into a target, completely controlling their mind while the victim remained convinced they were acting of their own free will. This ability required no eye contact and worked completely invisibly.
Weapon Proficiency
Shisui masterfully wielded kunai and shuriken, using them in combination with the Body Flicker Technique for lightning-fast attacks. He also mastered the sword, as evidenced by his participation in ANBU missions.