GEAR 5

Gear 5 is a hypothetical power-up in the "One Piece" anime series. As of my knowledge cutoff in September 2021, there is no official mention or appearance of Gear 5 in the series. However, it is widely speculated among fans that Monkey D. Luffy, the main protagonist, may achieve a fifth level of his unique combat ability known as "Gear."

In the anime, Luffy already possesses four forms of Gear, each granting him immense strength, speed, and elasticity. Gear Second boosts his blood flow, Gear Third enlarges his body parts, Gear Fourth enhances his muscles with Haki, and Gear Fourth's Snakeman form focuses on speed and flexibility.

Gear 5, if introduced, would likely take Luffy's powers to even greater heights, potentially pushing the boundaries of his capabilities and enabling him to confront formidable foes in his quest to become the Pirate King. However, as of my last update, it remains a fan theory and has not been confirmed or revealed in the official "One Piece" storyline.