Shinjiru quickly activates his 1T sharingan as the smoke bomb hits. He stands in a meditative stance peering around the large training field. With Shinjiru's 2T sharingan, he is able to see chakra to a certain extent. Clones are made primarily from chakra, so it stands to reason he'd be able to see them. With practiced ease, Shinjiru would seemingly disappear. In reality however, he has dashed off towards the forest and tagged a clone hidden behind a tree. Easily being able to perceive chakra, and the smallest movements, it is extremely simple for Shinjiru to find the clone hidden within a bush. He peers around again. Humans were harder to find. They weren't composed of just chakra like clones. They had real bodies, flesh, bones. And yet, we humans have chakra flowing through our bodies. Since Shinjiru is able to see chakra, it stands to reason he can see the chakra within a person. Therefore, he would dash off forward towards the grassy plain, and tag Sasuke who was hidden behind one of the rocks.