Season 1

Luffy is found floating at sea by a cruise ship. After repelling an invasion by the Alvida Pirates, he meets a new ally, their chore boy Koby.

Luffy and Koby find Zoro captured in Shells Town's Marine base, with the Marines intending to execute him. Luffy and Koby work together to retrieve Zoro's katanas, as well as confront the tyrannical Marine Captain Morgan and his son Helmeppo.

Luffy and Zoro battle and defeat Morgan, Helmeppo and the Marines. Koby parts ways with Luffy to join the Marines, and Zoro joins Luffy's crew as a permanent crew member.

The significance of Luffy's straw hat is explained as the hat was entrusted to him by his idol, Shanks. Luffy then accidentally finds himself in Orange Town, territory of the pirate Buggy.

Luffy, Nami, and Zoro confront Buggy the Clown. Buggy threatens to fire a Buggy Ball at Luffy, but this attack is redirected back at his men.

Luffy defends himself from Buggy's assassin, Beast Tamer Mohji and his lion Richie. Allying himself with the town's mayor as well as a dog, the Straw Hats return to Buggy's base to confront him.

Zoro takes on Buggy's acrobat and chief of staff, Cabaji, engaging in a one-on-one sword fight. After Zoro emerges victorious, Luffy battles against Buggy, where his straw hat is damaged by Buggy's attacks.

Buggy reveals how Shanks foiled his plans of stealing from their crew and making a fortune. The group defeat Buggy, expelling him from the island, before departing the island themselves toward their next destination.

In search of a proper ship, Luffy, Nami, and Zoro arrive in Syrup Village, where they meet the town's notorious liar, Usopp. They decide to ask the richest girl in the village, Kaya, but are confronted by her butler, Klahadore.

Combines episode 10 and part of episode 11 of the original Japanese version.

Combines parts of episodes 11 and 12 from the original Japanese version.

Kaya discovers Klahadore's true nature after finding Merry wounded. Meanwhile, Jango hypnotizes his men to increase their strength, and after this plan fails he summons the Nyaban Brothers to battle Zoro.

Captain Kuro himself arrives at the scene, and with Zoro too injured to fight, Luffy being incapacitated, and the other two, Nami and Usopp, being too weak to handle him, things seem hopeless. However, Kaya herself appears to bargain with Kuro.

Kuro battles Luffy, Jango pursues a retreating Kaya, and Zoro is faced by the strengthened Buchi. After Zoro emerges victorious, he leaves to aid Kaya, while Kuro explains his background as a pirate captain and his intentions to quit piracy.

Jango pursues Kaya in the forest and extorts her into signing the will, but Zoro and Usopp come to her aid. Meanwhile, Kuro uses his Shakushi attack, indiscriminately attacking Luffy and his own crew alike.

Luffy defeats Kuro and Usopp defeats Jango, expelling the Black Cat Pirates from the island. The crew receive a new ship from Kaya, accept Usopp as a new crew member, and set sail for their next destination.

After designing a jolly roger for the crew, they visit the Island of Rare Animals for treasure. They do not find treasure, but they befriend Gaimon, a man trapped in a box who had been living on the island for twenty years.

Zoro naps and dreams of his childhood, his relationship with the late Kuina and his ambitions. Meanwhile, Luffy fires a cannon at a rock, angering Zoro's old friend, Johnny.

The crew meets Johnny and Yosaku, Zoro's former bounty hunter companions, and they set sail for the Baratie restaurant in search of a cook. Meanwhile, Sanji, the restaurant's sous chef, beats an arrogant Marine lieutenant Fullbody during a heated argument.

Sanji feeds a starving pirate named Gin. Luffy begins his job as a chore boy to pay for the damage he caused to the Baratie. While working, Luffy tries to convince Sanji to join his crew, to no avail.

Gin returns to the Baratie with his also-starving captain Don Krieg to whom Sanji once more gives food. However, Krieg betrays the cook once he regains his energy and attacks the Baratie, despite the cook's best efforts to stop him.