Naruto Anime Episode 148-151: Find the Bikouchuu

In this third filler arc, Naruto learns of a unique tracking bug which could use the scent on Sasuke's forehead protector to track him down. Lead by Aburame Shino, Naruto travels to the Bikouchuu's birthing grounds to capture one. Unfortunately the Kamizuru clan from Hidden Rock has similar goals. Hinata uses the trip to further her skills and prove she is a kunoichi worthy of the Byakugan.

In the following summaries, Orange = Filler.

Episode 148: "Chou-tsuibi ryoku ni Akamaru mo shitto! Maboroshi no Bikouchuu wo sagase ~ Super Pursuit Power Even Akamaru Is Jealous Of! Seek The Mysterious Bikouchuu"

Airdate: 08/17/2005

This episode aired with Episode 147 and the Movie One Short in a 90 minute "Strongest in History" special. Naruto, Kiba, Hinata and Shino travel to the Bikouchuu birthing grounds. While camping for the night, Naruto spies upon a nude Hinata in training, though he does not know her true identity come morning. Also in the woods are three Rock ninja intent on finding the same bug.

Episode 149: "Doko ga chigau no sa!? Mushitte onaji mienai ka ~ What's the Difference!? Don't Bugs All Look The Same"

Airdate: 08/24/2005

The Konoha ninja continue their search through the woods for the Bikouchuu. They have little luck with Naruto falling to many of the forest pitfalls. With the help of Hinata's Byakugan, the group finally tracks down the Bikouchuu.

Episode 150: "Damashite bakashite damasarete! Souzetsu mushimushi dai batoru ~ Cheated, Deceived, Tricked! Heroic Hot and Humid Grand Battle"

Airdate: 08/31/2005

The Kamizuru think over how their clan met Aburame in battle, and were totally defeated. They hope to find their grandfather's scrolls to learn deadly forbidden techniques. The ninja manage to capture Hinata and offer a trade, the Bikouchuu for her. The Leaf ninja try to fool the Kamizuru, but fail. They then manage to capture the Leaf in a giant bee hive. Elsewhere tied up in a river, Hinata tries to free herself but comes loose and heads towards deadly falls.

Episode 151: "Moeyo Byakugan! Kore ga atashi no nindou yo ~ Burning Byakugan! This is My Way of the Ninja"

Airdate: 09/14/2005

Shino, Kiba and Naruto are weakened by the chakra sucking powers of the bees so the Kamizuru finally obtain the Bikouchuu. When they go to Hinata and see her absent, they gloat of her death. A furious Naruto tries to free himself for revenge but Hinata intervenes. Having saved herself from the falls, she shows off her new moves and impresses Naruto. The Kamizuru are soon defeated. Unfortunately Naruto screws up, causing the one Bikouchuu to become attuned to his fart, rather than Sasuke's scent.