One Piece is the flagship title card on this block: the best-selling manga of all time, a quarter century of settled history under a still-moving edge, and the deepest worldbuilding inventory in the medium. The quizzes here run on three axes. The Voyage walks the sagas in order, from East Blue to the Final Saga. The World tests the systems: Devil Fruits, Haki, the Marines, the Emperor and Warlord orders, and bounty records, always date-anchored because the numbers move. The Crew covers the Straw Hats and their orbits, joining order, roles, and dreams, tested as plot facts. The horizon is printed on the masthead and on every quiz: unmarked quizzes stop at what the anime has covered, and Manga Canon quizzes are labelled in their titles.
The world's strangest grocery list, tested at front-door depth: three great classes of fruit, one rule about the sea, and a price every user pays. This is the systems quiz for new arrivals, built entirely from the taxonomy the series itself teaches. If you can sort a fruit by what it does, and you know why nobody aboard swims anymore, you are ready.
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