One Piece: Taose! Kaizoku Ganzack (Light Novel) - Recommendations

• Other (1 ep)
• 2016

• Movie (1 ep)
• 2019

The world’s boldest buccaneers set sail for the great Pirate Festival, where the Straw Hats join a mad-dash race to find Gol D. Roger’s treasure. There’s just one little problem. An old member of Roger’s crew has a sinister score to settle. 

• Web

Remake of the East Blue saga.

• TV Special (1 ep)
• 2016

While exploring the New World, Luffy and the crew meet a mysterious girl named Olga. She is pretty on the outside but twisted and savage inside and she told them she is chased by the Navy and a powerful treasure hunter named Mad Treasure.

• Other (1 ep)
• 1999

A recap episode, covering episodes 1-5 of One Piece.

• Other (1 ep)
• 2016

• TV Special (1 ep)
• 2019

This is a story of Luffy in an alternate reality. While sailing on the sea by himself, a strange bird crashes into his small boat. He looks up to find a giant ship where a girl named Ann has been captured. It seems like the bird belongs to her.

• Movie (1 ep)
• 2002

While sailing the seas on a search for adventure, the crew of the Going Merry finds a strange island full of wondrous animals. Upon their arrival, the weather separates them from their newest crew member Chopper, and when he washes ashore on the island, the native animals mistake him for their prophesized King! As if things aren't bad enough, trouble comes to the wild kingdom: treasure hunters arrive in search of the Crowning Treasure, an artifact of incredible power said to make its user invincible. Now, the crew must protect the Kingdom and its treasure with all their might!

• Movie (1 ep)
• 2006

Having recovered a treasure chest from a sinking ship, the Straw Hat Pirates can’t wait to see what riches await them inside. So imagine their surprise when they find they've gotten an old lady instead! Anxious to get back home (and avoid Nami’s wrath for having thrown out the treasure previously in the chest), the old lady offers a great treasure reward if the crew will return her to her home on Mecha Island. Her legend of the Golden Crown sounds too good to be true… but Luffy smells adventure, so what's the crew to do? In an island full of amazing inventions, the crew will test their riddle-solving skills – and Luffy's dumb luck – to solve the mystery of Mecha Island and its treasure.

• Movie (1 ep)
• 2011

When Luffy’s hat is stolen one night by a large bird, the entire crew begins scouring the ocean in search of the flighty thief. While searching, Usopp and Chopper happen upon a mysterious and sick pirate on an otherwise deserted ship and take him aboard the Thousand Sunny in order to treat him. However, before they can deal with their new guest, the Straw Hat pirates must catch up to the bird, evade the marines that are hot on their tail, and escape from a den of giant sea monsters!