Monkey D. Luffy first uses Gear 2 in Episode 272 of the One Piece anime, titled "Luffy is in Sight! Gather at the Courthouse Plaza," during his battle against Blueno, a CP9 agent
. This occurs in the Enies Lobby arc, where Luffy reveals this new technique that enhances his speed, strength, and mobility by pumping his blood faster throughout his rubbery body, resulting in his skin turning reddish and emitting steam
. This episode marks the debut of Gear 2, a significant power-up for Luffy.
