One Piece is a grand pirate world full of unique power systems, diverse mythology, and imaginative technology that can do anything from creating life-saving miracles to destroying entire kingdoms. Considering One Piece takes place in a world full of pirates battling and trying to conquer the world, a lot of these items tend to do the latter.

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Coming from the artistic mind of Eiichiro Oda, One Piece is home to a wide variety of deeply inventive and stylistically unique weapons. In the struggle to become the next pirate king will be or the battle between the Revolutionaries and Marines, powerful weapons can make a huge difference.

Updated by George Voutiritsas on June 5th, 2022: One Piece has been around for a long time, and it takes place in a world filled with pirates, scientists, and marines, so it should come as no surprise that the series is filled with a variety of different weapons. In the right hands, anything can be turned into a weapon, but in One Piece, the best weapons are those that were specifically designed for combat. Other weapons can be deemed useful because they deal an excessive amount of damage in a short period of time. This list has already identified some of the series' best weapons, but there are several more that deserve recognition.

15 The Germa Raid Suits Enhance A User's Fighting Abilities

The Vinsmokes In Their Raid Suits

One Piece's Whole Cake Island arc delved into Sanji's tragic backstory, and fans learned that he was part of the Vinsmoke family, who founded the Germa Kingdom. The family once ruled all of the North Blue, and Judge decided to genetically modify his children so the family could reclaim its former glory.

Judge's children gained superhuman physical traits, and these traits were further enhanced by the family's raid suits. These technologically-enhanced outfits were designed for combat, and each suit had a unique ability that benefits its user. Each suit was waterproof and fire-resistant, and the boots were equipped with accelerators. The capes were bulletproof as well.

14 Excite Bullets Are Designed To Carry Diseases

Queen's Excite Bullets Turning People Into Ice Oni

The Wano arc has shown the true power of the Beast Pirates, including Queen the Plague, one of the crew's All-Stars (top commanders). Queen is a very entertaining cyborg who can transform into a brachiosaurus because of his Devil Fruit, but he is also a talented engineer.

He invented a new type of ammunition called Excite Bullets, designed to carry viruses. The Mummy virus is fast-acting and causes heavy bleeding and high fever, with the final stages causing severe dehydration. It may not be fatal, but the target is stuck in everlasting pain. The Ice Oni virus kills its target within an hour, but before that happens, their body temperature drops and they become mindless monsters with a demon-like appearance.

13 The Thousand Sunny’s Gaon Cannon Can Wipe Out Multiple Enemies

Modeled from the air pressure cannons that “Cyborg” Franky uses in his arms, the Gaon Cannon is an even more destructive air cannon installed at the literal head of the Straw Hat Pirates’ ship, the Thousand Sunny. The Gaon Cannon is the Thousand Sunny’s main weapon, releasing a beam to wipe out enemies and their bases, as evident when it was used against Duval and his Flying Fish Riders.

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Unfortunately, the Gaon Cannon requires several barrels of cola to fire a single shot. Cola is also the ship’s main fuel source, so the powerful cannon can only be used sparingly.

12 Energy Steroids Provide A Massive Power Boost For A Price

Based on actual Japanese folklore and hidden within the Fish-Man paradise that is the Ryugu Kingdom, the Tamatebako is a treasure said to contain the ability to age its user. Other lore claimed it to grant incredible strength. In actuality, both ideas were true. Used by Hody Jones and his New Fish-Man Pirates, the contents of the Tamatebako were mysterious pills called Energy Steroids.

At the cost of their user's lifespan, Energy Steroids have the ability to “make one as strong as a thousand men.” With these pills, one can turn any soldier within their army into a destructive, hulking monster. Upon taking multiple Energy Steroids, one is even able to compound their strength. However, taking too many also results in the users becoming incredibly aged.

11 Buggy Balls Are Stronger Than Ordinary Cannonballs

Buggy the Clown getting scared at Marineford in the One Piece anime

A bit of a forgotten gem in the One Piece world, Buggy Balls were invented by Buggy the Clown and his pirate crew and carry significantly more power than the average cannonball. One Buggy Ball alone is shown to be able to level half a village. During the Impel Down arc, Buggy even uses miniature versions of the Buggy Ball, dubbed “Muggy Balls,” that still carried plenty of destructive power, shown to be able to injure one of the hellish prison’s monstrous guards.

While these destructive red spheres haven’t made much of an appearance recently, they are still a defining resource and help make Buggy a consistent player in the Great Pirate Era.

10 The Pacifistas Are Cyborgs With A Lot Of Firepower

A relatively new invention within the One Piece world dubbed “Human Weapons,” Pacifistas are powerful cyborgs modeled on the warlord Bartholomew Kuma and invented by the Marines for the express purpose of wiping out the most powerful of pirate enemies. Each one supposedly costs the same as an entire battleship, and for good reason.

The Pacifistas have visual targeting systems specifically designed to focus on wanted pirates from any distance and laser beams modeled from the powers of one of the strongest marines, Admiral Kizaru, coming out of their mouths. These giant soldiers have already shown their destructive power against the likes of the early Supernovas and even the Whitebeard pirates during their attack on Marineford and will be a terrifying, reoccurring obstacle for the heroes for a long time to come.

9 General Franky Is A Giant & Versatile Robot

In seeming retaliation and defense against the Pacifistas, the trusty shipwright of the Straw Hats devised his own giant robot: General Franky. A much larger piece of walking metal than even Franky himself, General Franky is a piloted robot that carries stronger artillery than Franky’s base body, a Gaon Cannon of its own referred to as “General Cannon,” and enough strength and endurance to create massive destruction, whether it is fighting an enemy head-on, just walking, or flailing around with its mounted sword, the Franken.

During the Punk Hazard arc, Donquixote agent Baby 5 even claims that General Franky is able to withstand her own Pacifista-destroying attacks. During the Wano arc, General Franky defeated Sasaki of the Beast Pirates' Flying Six, who could transform into a triceratops thanks to his Mythical Zoan Devil Fruit.

8 Dials Have An Array Of Uses

Dials as a whole have been a rare commodity since the Skypiea arc. Strange devices made from particular seashells, dials are used as a versatile technology for Skypieans to cook, cut, and even travel. However, some of the most dangerous weapon-based dials are the Impact Dials, devices that can absorb the kinetic energy from an attack and send the damage back at the press of a button.

Even more powerful and rarer are Reject Dials, which can absorb the power of an attack and reflect back the damage tenfold, with the price being that it is literally a double-edged weapon that fires the multiplied damage at the target and user. An Impact Dial alone is enough to cause damage to the rubbery body of Monkey D. Luffy, but a Reject Dial has been shown to create huge amounts of destruction and even kill the god of Skypiea.

7 Yoru Is Wielded By The World's Strongest Swordsmen

Mihawk Using His Sword At Marineford

Getting deeper into the larger lore of the One Piece world, swordsmen have their own entire mythology separate from the pirates. Within this world, there are legendary swords of incredible grades that are treated as sacred. Of these legendary swords, the highest grade of all is the 12 Supreme Grade Swords. Several of them have been shown, and one is currently in the possession of Dracule Mihawk, the former Warlord of the Sea. While a sword’s power may be based more on its user’s skill than any actual innate strengths, they do elevate the potential destructive power of their user.

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Mihawk, has used his larger-than-life blade, Yoru, to make mincemeat out of giant pirate ships with the flick of his hand and cut the battleground of Marineford in half. These weapons are sought after for a reason, and they contribute a great amount to the lore and status quo of One Piece’s sword-wielding world.

6 Whitebeard Wielded Murakumogiri With Great Skill

Young Whitebeard With Murakumogiri

At the time of his death, Whitebeard was considered the strongest man in the world. He possessed immense Haki, but he also had the power of the Tremor-Tremor Fruit, which allowed him to create powerful tremors through land, sea, and air. It is believed that this ability can tear the world apart.

His weapon of choice was a large naginata known as Murakumogiri, which is part of the 12 Supreme Grade Swords as well. It is one of the strongest and most durable weapons in existence, as it did not melt while coming in contact with Akainu's magma. Whitebeard could even use his Devil Fruit in tandem with Murakumogiri.

5 Ace Is The Legendary Sword Used By Gol D. Roger

Gold Roger Infusing Ace With Haki

As the former King of the Pirates, Gol D. Roger is one of the strongest characters in all of One Piece's history, and his crew was filled with powerful pirates as well. Roger did not possess a Devil Fruit, but his Haki was unimaginably powerful, and he would infuse that Haki into his signature sword, Ace.

Ace is a cutlass, and it happens to be one of the 12 Supreme Grade Swords. Roger wielded this sword at God Valley, where he and Garp battled the infamous Rocks Pirates. The blade clashed with Whitebeard's Murakumogiri numerous times and sustained no visible damage.

4 Caesar Clown's Shinokuni Petrifies Its Victims

Entering the more ethically dangerous elements of chemical warfare is One Piece’s terrified affinity for the poisonous gases. Whether it has someone hunting for a gas mask on the Baratie or running back for their cell on Impel Down, poison gases have been a devastating weapon against large forces. None, however, have shown to have as much destructive power as Caesar Clown’s Shinokuni.

This gaseous explosion petrifies its victims. If someone isn’t revived fast enough, they will be killed within the dark, purple cloud. Shinokuni itself is made when the personification of a chemical explosion (dubbed Smiley) is fed a certain candy and caused to die and explode. Every facet of Caesar’s chemical weapons, from its creation to its destruction, are chaotic, powerful, and saddening.

3 Nami's Clima-Tact Can Manipulate The Weather

Invented by Usopp, suited up with materials from the Boin Archipelago, and combined with ahead of its time weather technology and research, Nami’s Clima-Tact is a destructive and versatile tool that deserves a little more credit. It can summon rain, storms, winds, and lightning in any sized room, while also creating mirages to hide its user.

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The Clima-Tact allows Nami to take on strong foes, wipe out huge groups of enemies (and, more often than not, allies), and even redirect a lightning attack from one of the strongest pirates on the sea. Needless to say, Nami is far from the weakest member of the crew. The Clima-Tact has become even more powerful now that Zeus has fused with it.

2 Poseidon Can Destroy The World Through The Sea Kings

One Piece - Mermaid Princess Shirahoshi - Poseidon

Shirahoshi is the princess of the Ryugu Kingdom, and unfortunately, she will forever be known as a crybaby. That being said, she is also the current manifestation of Poseidon, one of the 3 Ancient Weapons that can potentially destroy the world.

Poseidon has the ability to communicate with and control Sea Kings-the massive meat-eating monsters that can be found in all of the world's oceans. Sea Kings possess immense destructive power, capable of sinking entire islands with ease. One command can therefore cause cataclysmic damage.

1 Pluton Is An Ancient Ship Of Extreme Power

One Piece’s legendary “Ancient Weapons” weapons are hidden throughout the world and are said to be able to cause massive destruction. They are the major argument for citizens of the world to avoid any study of the Void Century or the hidden Poneglyphs. While only two of the three have been identified thus far, Pluton is the only Ancient Weapon that is an actual item, as Uranus has yet to be revealed and Poseidon is Shirahoshi.

Pluton is an ancient ship lost long ago with origins in Water 7. Just the knowledge of Pluton’s location or blueprints warrants mass efforts from the World Government to hunt down any possible conspirator. While it or its potential has yet to be shown, Pluton is easily One Piece's most powerful weapon with all the destruction, conspiracies, and fighting that just its reputation has encouraged.