Note: The transformation was teased at the very end of Chapter 783.
Monkey D. Luffy unveils this transformation during the absolute climax of the Dressrosa Arc to break the ultimate stalemate against the Warlord of the Sea, Donquixote Doflamingo. The Moment of Reveal: Dressrosa Arc
Here’s a deep, reflective post on the topic: when do we first see gear 4
That’s the moment.
The final, island-folding blow used to defeat Doflamingo. Legacy and Evolution Note: The transformation was teased at the very
The first appearance of Gear Fourth occurs during the climax of the Dressrosa Arc, specifically in the battle against the Warlord of the Sea, Donquixote Doflamingo.
Prior to the reveal, Luffy's base form, Gear 2, and Gear 3 were simply not enough to overcome Doflamingo's awakened String-String Fruit abilities. Doflamingo easily deflected Luffy’s attacks and mocked his efforts. The Moment of Reveal: Dressrosa Arc Here’s a
Unlike Gear Third, which focuses on the inflation of bones to generate massive scale, Gear Fourth focuses on the inflation of .
A punch that can change direction in mid-air to "chase" an opponent. Leo Bazooka: A massive double-palm strike.
We first see (Gear Fourth) in Manga Chapter 784 (titled " Gear 4 ") and Anime Episode 726 (titled "Fourth Gear! The Phenomenal Bounce-man!").