Question

how is kakashi?and why he popularly known as copy Ninja?​

Answer 1

Answer:

Over the years, due in large part to his Sharingan, he gained a vast arsenal; reputed to have copied over a thousand jutsu and which led to his moniker as "Copy Ninja Kakashi" (コピー忍者のカカシ, Kopī Ninja no Kakashi).

Explanation:

Answer 2

Kakashi hatake is 6 hokage of konoha.

He possess Sharingan and can copy others Jutsu that's why he is popularly known as Copy ninja