The Straw Hats visits an island, known as Mecha Island, where a fisherman sings an old folk song about a Golden Crown. Searching for that mysterious treasure, they find a hidden entrance into the island. The island's leader, Ratchet, impressed with the find and in search of the Golden Crown himself, invites the crew to join him in his search and the crew along with Ratchet and his henchmen enter the cave. As it turns out, the islands true form, is that of a giant turtle. Ratchet, who had known this all along, uses his mechanical castle to take control of the turtle, in order to use it, to take over the world. Now the Straw Hats have to stop not only Ratchet, but also the helpless turtle, from crashing into a nearby island.

The Straw Hats visit a recreational island, run by Baron Omatsuri, the former captain of a pirate crew, who were all killed years ago. Being the only survivor, he then started hating all close-knit groups of pirates and wishing to separate them. He and his henchmen seed distrust among the Straw Hats and capture them one by one, leaving only Luffy to free his crew from the Baron's hold.

The Straw Hat Pirates landed at Asuka Island, home of the most valuable sword in the world: The Seven Star Sword. Which was said to curse anyone who takes it in possession. When they got back to the Going Merry, they discovered that Zoro is missing from his guard duty. Before they could plan out a search party to relocate him. Luffy and friends escape from the port as Marines were on their tail. They found a new place to dock, which is near a village. Whose job is to keep the Seven Star Sword sealed. Soon it was attacked by the Marines, and among them is Zoro. Luffy and the others don't know why he's helping out the Marines. But it all comes to conclusion when Luffy encounters Saga: Zoro's childhood friend from Swordsman training.

Desperate for cash, the Straw Hat Pirates enter a secret race between pirate crews known as the Dead End Competition. There, they must battle against powerful people, including the bounty hunter who wants to kill Gasparde and a climatic battle with Marine-turned-pirate Captain Gasparde.

As the Straw Hat Pirates sail through the Grand Line.A line of geysers erupted from under the Going Merry. And the whole crew find themselves flying over the island. Unfortunatly, Chopper fell off the ship and was separated from his friends. Luffy and the others landed on the other side of the island. Chopper meanwhile finds himself being worshiped as the island's new king by the animals. To make matters worse, a trio of human "horn" hunters are on the island. The leader, Count Butler is a violin playing/horn eating human who wants to eat the island's treasure to inherit immense power. Will Luffy & the rest be able to prevent the count from terrorizing the island? And will they be able to convince Momambi that not all pirates are bad?

Relaxing on a cozy beach, the Straw Hat Pirates are taking a rest from their quest. Right until Luffy noticed the Going Merry has been hijacked and sailed off from the beach. This leads them to search the ship and find the thief who took it from them. They ran into a duo named the Theif Brothers, who informed them that their ship was stolen by a group of pirates called the Trump Kyoudai. When they encountered the Trump Pirates, Nami ended up getting kidnapped as well as Luffy's hat. They tracked down the pirates to their base on Clockwork Island. Now Luffy, Zoro, Sanji, Usopp, and the Theif Brothers must reclaim the Going Merry, Save Nami, and get back Shank's straw hat.

There once was a pirate known as the Great Gold Pirate Woonan, who obtained almost one-third of the world's gold. Over the course of a few years, the pirate's existence faded, and a legend grew that he disappeared with his gold to a remote island, an island pirates continue to search for. Aboard the Going Merry, Luffy and his crew, starved and reckless, are robbed of their treasure. In an attempt to get it back, they wreck the getaway ship, guided by a young boy named Tobio, who's a captured part of El Drago's pirate crew. El Drago's love for gold has driven him to look for Woonan's island, and thanks to Woonan's treasure map, he finds it. During this time, Luffy's crew have been split up, and despite their own circumstances, they must find a way to stop El Drago from obtaining Woonan's gold.