This episode is part of the long stretch of filler that occurred after the Sasuke Recovery Mission. While not canon to the manga, it provides significant closure to the very first conflict of the series (Naruto vs. Mizuki in Episode 1).
You can watch the English dubbed version of Naruto on platforms like Hulu and Netflix (availability varies by region). Naruto (Dub) Episode 147
Demonstrates his growth by defending his mentor, Iruka, and using the Rasengan effectively in a combat situation outside of training. This episode is part of the long stretch
Confronts his past and his former friend. This episode highlights Iruka's role not just as a teacher, but as the first person to truly acknowledge Naruto. You can watch the English dubbed version of
Naruto eventually defeats Mizuki using his , knocking him back to his human state. As a side effect of the potion, Mizuki’s body rapidly withers and ages, leaving him in a permanent state of physical ruin. Iruka reflects on their shared past, ultimately deciding that while Mizuki chose the path of hatred, Naruto chose the path of growth through bonds. II. Key Character Developments