Genin Takedown! All Nine Rookies Face Off!

is episode 23 of the original Naruto anime.

Synopsis
Kakashi explains to his team about how the Chūnin Exams is taken in teams of three. Naruto, Sakura, and Sasuke meets with the rest of the Rookie Nine and with the other participants. They also meet Kabuto Yakushi who explains why the Chūnin Exams are taken together with other countries. Eventually, after a brief skirmish with some sound ninja, Ibiki Morino, the examiner of the Chūnin Exams first test, shows up.