Dreams!, The Zenny Pirate Crew Sortie!, Beyond the Rainbow
Season 5 of One Piece is mostly made up of original filler stories, meaning they are not part of the main manga storyline but focus on side adventures of the Straw Hat crew. The season begins with the “Dreams!” arc, where each Straw Hat reflects on their personal goals and motivations, highlighting their determination to continue their journey. Next is the “Zenny Pirates” arc, in which the crew encounters an elderly moneylender named Zenny who lives on an island with his unusual group of companions. What starts as a conflict gradually turns into mutual respect as the Straw Hats learn about his past. The final arc, “Rainbow Mist,” traps Luffy and his friends inside a mysterious, time-distorting fog. There they meet children who have been separated from their families for years due to the mist’s strange effects. The crew helps them uncover the truth behind the phenomenon and find a way back home.
Episodes
131 The First Patient! The Untold Story of the Rumble Ball! Nov 3, 2002 
132 Uprising of the Navigator! For the Unyielding Dream! Nov 10, 2002 
133 A Recipe Handed Down! Sanji, the Iron Man of Curry! Nov 17, 2002 
134 I Will Make it Bloom! Usopp, the Man, and the Eight-Foot Shell! Nov 24, 2002 
135 The Fabled Pirate Hunter! Zoro, the Wandering Swordsman! Dec 1, 2002 
136 Zenny of the Island of Goats and the Pirate Ship in the Mountains! Dec 8, 2002 
137 How's Tricks? The Designs of Zenny the Moneylender! Dec 15, 2002 
138 Whereabouts of the Island Treasure! Attack of the Zenny Pirates! Dec 22, 2002 
139 Legend of the Rainbow Mist! Old Man Henzo of Luluka Island! Jan 5, 2003 
140 Residents of the Land of Eternity! The Pumpkin Pirates! Jan 12, 2003 
141 Thoughts of Home! The Pirate Graveyard of No Escape! Jan 19, 2003 
142 An Inevitable Melee! Wetton's Schemes and the Rainbow Tower! Jan 26, 2003 
143 And so, the Legend Begins! To the Other Side of the Rainbow! Feb 2, 2003