One Piece Episode 131, titled , is the first episode of the Post-Alabasta Arc . It originally aired on November 3, 2002. Episode Summary

: It highlights his first experiences as a doctor and his relationship with his mentor, Dr. Kureha . Viewing Guide Information Arc : Post-Alabasta Arc (Filler).

: This is considered "canon filler" or "mixed canon"—while it is not adapted from the main manga chapters, it expands on character backstories in a way that remains consistent with the original story.

: Most viewer guides classify this as an optional "filler" episode. If you are only interested in the main plot, you can skip to Episode 144 to begin the Jaya Arc . However, many fans recommend it for the heart-warming character development between Chopper and Robin.

After the events in Alabasta, the Straw Hat Pirates drop anchor at a pineapple-shaped island to restock supplies. While most of the crew is busy with chores, stays behind to guard the Going Merry . During this time, he spends time with the crew's newest member, Nico Robin , and reminisces about his past.

: The episode delves into Chopper's history on Drum Island, specifically the creation of his Rumble Ball —a drug that enhances his Devil Fruit powers.