Monkey D. Garp, also known as “Garp the Fist,” is a powerful Marine Vice Admiral and one of the most legendary figures in the world of One Piece. He is the father of Dragon, the grandfather of Luffy, and the adoptive grandfather of Ace. While Garp is an incredibly strong fighter and possesses several impressive abilities, it is not confirmed whether he has Conqueror’s Haki.

Conqueror’s Haki, also known as Haoshoku Haki, is a rare and powerful form of Haki that allows the user to exert their willpower over others. It is a rare ability that only a select few individuals possess, and it is highly prized by pirates and Marines alike. Conqueror’s Haki can be used to knock out weaker opponents or to intimidate and control large groups of people.
While many characters in the One Piece universe have demonstrated the ability to use Conqueror’s Haki, Garp’s use of this ability has never been confirmed. However, there are some hints in the series that suggest he may have this powerful ability.
One such hint comes from a flashback in which Garp is shown fighting against the Pirate King, Gol D. Roger. During this battle, both Garp and Roger display an incredible amount of power, and it is hinted that they are evenly matched. It is possible that Garp’s ability to fight against someone as powerful as Roger is due in part to his use of Conqueror’s Haki.
Another hint comes from a scene in which Garp confronts Luffy and knocks out several people with a single punch. While it is not confirmed whether Garp used Conqueror’s Haki in this scene, it is possible that his ability to knock out so many people with a single blow is a sign of his mastery of this powerful ability.
Despite these hints, it is important to note that Garp’s use of Conqueror’s Haki is not confirmed. It is possible that Garp possesses other powerful abilities that allow him to fight on equal footing with some of the strongest characters in the One Piece universe. In fact, Garp’s incredible physical strength, speed, and durability make him one of the most formidable fighters in the world, even without the use of Conqueror’s Haki.
In conclusion, while Garp’s use of Conqueror’s Haki is not confirmed, there are several hints in the One Piece series that suggest he may possess this powerful ability. However, Garp’s incredible physical strength and fighting skills make him a formidable opponent even without the use of Haki. Ultimately, the question of whether Garp has Conqueror’s Haki remains open to interpretation, and it is up to the individual reader to decide for themselves.