What episode does guy fight the kyuubi clone?

Guy fights the Kyuubi clone in "Naruto: Shippuden" Episode 421, titled "The Sage of the Six Paths." In this episode, Guy faces off against the Ten-Tails’ Jinchuriki, who has summoned a massive clone of the Nine-Tails (Kyuubi) during the Fourth Great Ninja War. The battle showcases Guy's incredible strength and determination as he pushes his limits against the formidable foe.