Pluton

Pluton is one of the three ancient weapons, alongside poseidon and uranus. Pluton is a highly advanced warship capable of mass destruction, labeled the world's worst battleship (世界最悪の戦艦, sekai saiaku no senkan?). It was constructed long ago in the city of water 7 in the grand line. The battleship is said to be capable of destroying whole islands in a single shot and is located deep beneath mt. Fuji in wano country.Pluton was first mentioned by crocodile when he questioned nefertari cobra of its whereabouts. In the water 7 saga, its blueprints were an important item that served as the catalyst for the saga's events.

It is supposed to be a large warship of some kind. Both franky and iceburg were shocked when seeing the blueprints, wondering how a ship like pluton could be built in the first place. In the words of tom, who was considered the best shipwright in the world, it is the most monstrous ship ever made in the history of ship building. Not much else is known about it.Pluton is the most powerful warship in the world. The battleship is said to be capable of destroying whole islands in a single shot whoever controlled the weapon had the potential to conquer the world in the process and in the wrong hands would be dangerous. Likewise, pluton also had the ability to do as much damage to the world. Furthermore, because the blueprints remained in existence even after the ship was built, whoever possessed the blueprints to the vessel would have the potential to build a fleet of vessels with the same destructive abilities as each other.

The blueprints had been preserved as a means of bringing pluton back into existence should the world ever need it to fight the weapons, including the original pluton itself. At this point, however, the blueprints which were used to create it are now destroyed while pluton itself is still asleep.After inspecting the poneglyph in the basement of the shogun's castle, robin talked with the former shogun, kozuki sukiyaki, and revealed that the poneglyph in arabasta said that pluton was in wano country, which sukiyaki confirmed. Sukiyaki escorted robin and trafalgar law down a secret staircase to a cavern at the base of mt. Fuji and near the ancient settlement of wano. He informed them that pluton was buried further beneath mt. Fuji and that the walls around the country would need to be removed in order to retrieve the battleship.