Naruto - Season 4 Episode 193 Viva Dojo Challenge! Youth is All About Passion!
Overview: When Naruto returns from a mission, he discovers that Lee has set up a Dojo and is desperate for a challenger. When Gai discovers nobody has challenged him he steps up to the plate! However, a last minute change in plans throws changes everything, and when an imposter joins the fray, chaos ensues....