For a useful report or detailed insights into Gear 4th and its applications in the series, here are some key points:

For those seeking the specific , the answer is Episode 726 , titled "Gear 4! The Phenomenal Boundman!" However, to simply cite the number does a disservice to the masterpiece of tension, animation, and audio design that Toei Animation delivered on that fateful day. This review examines why Episode 726 remains one of the high-water marks of the entire anime adaptation.

Episode 726 answers that question with a resounding "Yes." It shows us that Luffy didn't just learn Haki; he integrated it into his rubber physiology in a way only a creative genius (or a madman) could conceive. He combined the elasticity of his body with the hardness of armor. He became a bouncing castle that hits like a meteor.