Formation! The Sasuke Retrieval Squad (結成！鉄壁のフォーメーション, Kessei! Teppeki Fōmēshon) is the episode 110 of the original Naruto anime.
When Sakura awoke, she informed Izumo and Kotetsu, who told Tsunade of Sasuke's defection. Unable to send higher ranking ninja after Sasuke, Tsunade ordered Shikamaru to assemble a team of genin under his lead to go after Sasuke. He selected Naruto, Neji, Chōji, and Kiba, and quickly devised the optimal formation for the group. Before they left, Sakura pleaded to Naruto to make sure to bring Sasuke back. Naruto promised to do so, and the group set out.