We first see (Gear Fourth) in Manga Chapter 784 (titled " Gear 4 ") and Anime Episode 726 (titled "Fourth Gear! The Phenomenal Bounce-man!").

The introduction of Gear 4 remains one of the most iconic power-up sequences in the One Piece series. After reaching a stalemate against the Warlord Doflamingo, Luffy reveals a technique he developed during his two-year training on with Silvers Rayleigh. The First Form: Boundman

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