

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.

One Piece: Baron Omatsuri and the Secret Island
7.2
One Piece: Chopper's Kingdom on the Island of Strange Animals
6.7
One Piece: Clockwork Island Adventure
6.9
One Piece: Curse of the Sacred Sword
6.9
One Piece: Dead End Adventure
7.0
Origin: Spirits of the Past
7.0
Doraemon: Nobita's Treasure Island
7.0
One Piece "3D2Y": Overcome Ace's Death! Luffy's Vow to his Friends
7.1
One Piece: The Movie
7.1
One Piece: Episode of Chopper Plus: Bloom in the Winter, Miracle Cherry Blossom
7.1
One Piece: Stampede
7.8
Doraemon: The New Record of Nobita's Spaceblazer
6.8