Egghead Island One Piece ke final saga ka pehla arc location hai. Ye Dr. Vegapunk ka island hai — jo duniya ka sab se intelligent scientist hai. Egghead ki technology future se 500 saal aage ki hai. Poora island Vegas-styled hai aur yahan holograms, robots, aur advanced weapons hain. Dr. Vegapunk ne yahin apni research ki aur World Government ke liye weapons develop kiye — jisme Seraphim (pacifista ke advanced version jo child-clones hain Warlords ke) bhi shaamil hain. Egghead Island par hi Vegapunk ne apna sab se bara raaz duniya ke saamne reveal kiya broadcast ke through. Usne bataya ke duniya ki geography aur history ke baare mein World Government ne kya chupaya hai. Egghead arc mein Luffy ne Admiral Kizaru aur Saint Jaygarcia Saturn (Gorosei mein se ek) se ladai ki. Luffy ne Gear 5 (Nika form) mein Kizaru ke saath fight ki — ek incredible battle. Vegapunk ne bataya ke dunia 800 saal pehle Great War ke baad flooded hui thi aur islands alag alag ho gaye. Ancient Kingdom aur Joy Boy ke baare mein aur bhi raaz reveal hue. Egghead arc abhi bhi fresh hai fans ke liye aur ye One Piece ke endgame ki taraf bada lead-up tha.