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This article contains details of the ending and/or a surprise plot element.
Naruto is a manga series written and illustrated by Masashi Kishimoto. It was published in September 1999 as a part of Weekly Shōnen Jump and ran publication until 2014. The series was later made into anime by Studio Pierrot and Aniplex that debuted in October 2002 and ended in February 2007. This was then followed by a sequel series, Naruto: Shippuden, which began airing shortly after the the conclusion of the original series.
The premise follows the journeys of Naruto Uzumaki, a young ninja determined to achieve recognition and become his village's Hokage. This story is divided into two parts separated by a two-year time skip. The first chapter has Naruto training to become a ninja and participating in a ninja exam. The second chapter details the fourth great ninja war and the Tailed Beasts involved in it.
Eat or be Eaten: Panic in the Forest (E28)
Naruto is swallowed by a massive snake after being separated from his team. He escapes by using his Shadow Clone Technique to burst out of the snake.
Long Time No See: Jiraiya Returns! (E53)
Naruto gorges himself on a huge watermelon he brought for Jiraiya.
Live or Die: Risk it All to Win it All! (E56)
Early in the episode, Jiraiya takes Naruto out for ramen and Naruto gets bloated after six bowls.
Naruto's Ninja Handbook (E78)
While fighting Gamabunta, Shukaku uses Wind Style: Air Bullet. He fills himself with air before firing a blast of sand.
A New Training Begins: I Will Be Strong! (E86)
Naruto buys and eats a lot of food from a festival.
The Dark Creeping Clouds (E155)
Naruto is briefly stuffed after he eats some curry.
Mix It, Stretch It, Boil It Up! Burn, Copper Pot, Burn! (E168)
The food the ninja chefs prepare is delicious, but those who eat it just eat more of it and become fat. This happened to Ayame when she was kidnapped.
Naruto: Shippuden (anime)
The Fake Smile (E36)
Naruto eats his fill at a hot spring.
Orochimaru vs. Jinchūriki (E42)
Four-Tailed Naruto uses Tailed Beast Bomb. This involves summoning a dense ball of chakra and swallowing it, which causes him to bloat up.
The Two Charms (E95)
In the omake, Naruto, Sai, Kiba, Shino, Yamato and Hinata all compete in a ramen eating contest. With almost everyone ending up sick, except Hinata who won in the end.
Naruto: Outbreak (E183)
In a flash-back to the days of the original series, Naruto drowns his sorrows in ramen after making Sakura mad, becoming heavily stuffed as a result.
An A-Rank Mission: The Contest (E309)
In another flash-back, Naruto enters a Bean Jam Bun eating contest along with Choji. However, Naruto became too full during the first round and subsequently lost.
The Hidden Heart (E392)
Shukaku uses Wind Style: Sand Bomb Salvo to protect Gaara from Madara. He inflates himself before firing a buckshot of sand.
Naruto Shippuden the Movie: Bonds
The Zero-Tails, fused with Shinnō, absorbs chakra from Naruto. He opens it for an attack by filling it with more chakra than it can handle.
Later, Jiraiya summons Gamabunta to break the fall of Naruto and Amaru after they fall from the Land of the Sky. He creates a massive cushion by puffing up with air.