Rivals (episode 258)

is episode 258 of the Naruto: Shippūden anime.

Summary
During the Chūnin Exams, Team 7 is ambushed by a ninja with snake-like abilities. Sasuke offers the scroll, but Naruto snatches it away, accusing Sasuke of being a coward and arguing that there's no guarantee the ninja will let them live. Orochimaru summons a snake and attacks Naruto, who draws on the Nine-Tails's chakra to defend himself and Sasuke. Sasuke, angered by Naruto's taunts, helps him fight Orochimaru. While travelling with Kabuto, they are ambushed by a group of illusory clones, and Naruto defeats them with his Shadow Clone Technique, luring out the Amegakure ninja group controlling the illusions and defeating them, surprising Sasuke with his strength. During the third phase of the exam, Sasuke confesses his desire to face Naruto in combat, and asks Kakashi to teach him the Chidori.