The Yonko in One Piece are known for their powerful abilities. While some of them rule the seas through their mastery of Haki, others possess unique devil fruits that allow them to turn into mythical creatures. However, apart from the Haki and Devil Fruits, every Yonko is associated with an iconic weapon, and here in this article, we are going to look at them one by one.
Across arcs like Marineford, Whole Cake Island, and Wano, Eiichiro Oda used these weapons to reflect each emperor’s personality and fighting style. Some are legendary blades, while others are strange tools tied directly to their powers. Here are the strongest Yonko weapons in One Piece, ranked by overall power and impact.
7. Buggy Balls Made Buggy a Yonko-Level Threat
Despite their funny look in the Orange Town Arc, Buggy’s Buggy Balls were highly destructive right from the beginning. They had enough power to destroy buildings and heavily damage ships.
The uniqueness of Buggy Balls comes from the fact that they suit Buggy’s crazy image perfectly. Even when he became a Yonko through the rise of Cross Guild in the Final Saga, Oda still uses these weapons to balance comedy with serious danger.
6. Blackbeard’s Pistols Become Deadly With Darkness
Blackbeard’s pistols are simple compared to the massive weapons used by other emperors, but that simplicity works in his favor. During Marineford, Teach combined firearms with the Yami Yami no Mi to attack enemies after nullifying their Devil Fruit abilities.
His weapons reflect his dirty and unpredictable fighting style. After stealing Whitebeard’s Gura Gura no Mi, even his simplest attacks became more intimidating than many flashy techniques.
5. Napoleon Turns Big Mom Into a Walking Disaster
Introduced properly during the Whole Cake Island Arc, Napoleon is a living Homie created using Big Mom’s Soru Soru no Mi powers. The weapon transforms from a hat into a gigantic sword capable of massive slashes.
Napoleon became even more dangerous during Wano when combined with Hera and Prometheus. Big Mom’s battles felt overwhelming because her weapons attacked alongside her, making her look more like a natural disaster than a pirate captain.
4. Kaido’s Hassaikai Crushes Everything in Its Path
Kaido’s weapon, Hassaikai, immediately got famous once Kaido overpowered Luffy using just a single Thunder Bagua in Chapter 923. This big weapon suited Kaido’s fighting nature perfectly.
Hassaikai was central to most rooftop attacks in Wano, especially after Kaido infused it with Advanced Conqueror’s Haki. It’s so powerful that even Gear Fourth Luffy initially struggled badly against it.
3. Luffy Turned His Own Body Into a Yonko Weapon
Unlike the other Yonko, Luffy turned his own body into his strongest weapon after eating the Hito Hito no Mi, Model: Nika. Every Gear transformation changed his fighting style dramatically across Enies Lobby, Dressrosa, and Wano.
Gear Fifth pushed that idea further during Chapter 1044. Luffy fought with complete freedom, turning both enemies and the environment into extensions of his attacks in ways no other emperor could replicate.
2. Whitebeard’s Murakumogiri Could Destroy the World
Murakumogiri was already one of the twelve Supreme Grade Blades, but Whitebeard elevated it to another level during the Marineford War. Every strike combined immense physical strength with earthquake powers from the Gura Gura no Mi.
The weapon’s destructive scale still feels unmatched. Whitebeard created massive shockwaves, tilted oceans, and threatened the entire battlefield despite being old and heavily injured.
1. Shanks’ Gryphon Reveals the Power of His Haki
Very little is known about Shanks’ Gryphon sword, but its feats already place it at the top. During Shanks’ clash with Whitebeard in Episode 316, the sword matched Murakumogiri while splitting the skies through Haki alone.
Unlike Kaido or Whitebeard, Shanks relies almost entirely on mastery and precision. His Divine Departure attack against Kid in Chapter 1079 showed just how terrifying Gryphon becomes when combined with the elite Conqueror’s Haki.
| Series Title | One Piece |
| Manga Author | Eiichiro Oda |
| Manga Rating (Mal) – as of June 6, 2026 | 9.21 / 10 |
| Where to Read | Manga Plus by Shueisha, Viz Media |
Now the big question – Which Yonko weapon do you think would dominate the seas if used by someone else? Share your thoughts in the comments section below.
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