From TV Animation - One Piece - Niji no Shima Densetsu (J) [!]

From TV Animation - One Piece - Niji no Shima Densetsu overview and version notes

Back in 2001, I spent hours with this little gem on my original Wonderswan Color—it's the only truly canonical One Piece game that reimagines the Rainbow Mist filler arc from the anime. You guide Luffy's early crew—Zoro, Usopp, Nami, and Sanji—through side-scrolling levels across Rainbow Island, with pixel art so faithful it feels ripped from Toei Animation's early 2000s storyboards. Combat blends with exploration puzzles where you need specific crew abilities to progress, though some of those fetch quests between character swaps could drag more than a sea king's anchor. From TV Animation - One Piece - Niji no Shima Densetsu is a Wonderswan entry prepared for browser play, with platform, controls, and play context worth checking before launch.

• From TV Animation - One Piece - Niji no Shima Densetsu platform notes
  From TV Animation - One Piece - Niji no Shima Densetsu is a Wonderswan entry prepared for browser play, with platform, controls, and play context worth checking before launch. The strongest visible context is the Wonderswan platform and its general play style. Emulator core: ws.
• Character-Specific Abilities
  Zoro slices through vine barriers with his swords, Usopp uses his slingshot to hit distant switches, and Nami's thief skills disarm tricky traps—swapping between them keeps the exploration fresh.
• Authentic Anime Adaptation
  The sprite work perfectly captures Eiichiro Oda's goofy character expressions, and key story moments replay at save points like watching 2002 TV episodes through pixel vignettes.
• Platforming with Purpose
  Jumping over geysers in Cherry Blossom Forest or using Luffy's stretchy grab during the rainbow bridge sequences adds movement variety to the standard running around.