Since there are two main series under the "Naruto" brand, there are two different "Episode 55" storylines. Most fans refer to the original series where Naruto is training with Jiraiya. Title: " A Feeling of Yearning, A Flower Full of Hope "

Naruto Uzumaki continues his grueling training under Jiraiya to master the Summoning Jutsu . He struggles to access his red Nine-Tails chakra, initially only managing to summon tadpoles. By the end of the training, his tadpole finally develops legs, showing his gradual progress.

This episode focuses on Naruto beginning his training to master his wind-natured chakra under the guidance of Kakashi Hatake and Yamato .

GIFs that I stole from YouTube videos by Galaxianista on DeviantArt