
**Warning: This article contains spoilers from the Elbaf arc of One Piece.**
Overview of Pluton in One Piece
- Pluton, the Ancient Weapon, was first introduced in the Arabasta arc through the character Crocodile.
- New hints suggest that Pluton might be a living creature, potentially a giant whale, rather than merely a ship.
- It is theorized that Pluton may serve a cataclysmic purpose, such as destroying the Red Line and ultimately creating the mythical All Blue.
The concept of Ancient Weapons represents a crucial element within the narrative of One Piece, and they are set to be pivotal in the series’ Final Saga. Recently, the Ancient Weapon Uranus demonstrated its devastating power by obliterating the kingdom of Lulucia, and the existence of Poseidon, embodied by Shirahoshi, has already been unveiled. This leaves Pluton shrouded in mystery, even though it was the first Ancient Weapon mentioned in the plot.
With the Elbaf arc delving into rich lore from the past, Pluton has resurfaced as a focal point of discussion. Various theories circulate regarding its true nature. Recent clues suggest that Pluton might actually take the form of a giant whale.
Describing Pluton in the Context of One Piece



- Pluton was first mentioned in Chapter 192 of One Piece.
- Crocodile sought after Pluton to further his own ambitions.
The significance of Pluton has reverberated through several story arcs, despite its full capabilities remaining obscured. The initial reference to Pluton emerged during the Arabasta arc, when Crocodile expressed his desire to harness its power. He described Pluton as a colossal ship hidden within the kingdom of Arabasta, claiming it possessed the destructive potential to annihilate entire realms. Fortunately, Nico Robin refrained from disclosing its location to Crocodile, who ultimately faced Luffy’s defeat and captured.
Further lore was revealed in the Water 7 arc, where it came to light that Franky possessed the blueprints for the Ancient Weapon. These blueprints had been inherited from Water 7’s shipbuilders, particularly Tom, and confirmed Pluton’s historical significance tied to the island’s shipwrights.

In a pivotal moment during the Enies Lobby arc, Franky eradicated the blueprints for Pluton. This act ensured that unless he had memorized the designs, reconstruction of the weapon would be impossible, leaving only its original form intact. In the Wano Country arc finale, Pluton was revealed to be resting beneath the old Wano. The notion of opening Wano’s borders symbolically correlated with releasing the Ancient Weapon, leading to speculation as to Pluton’s true identity and purpose.
Exploring the Giant Whale Theory for Pluton
Reimagining Pluton: What Fans Might Not Expect

At first glance, the idea of Pluton as a whale may seem absurd; however, a closer examination reveals compelling arguments in its favor. Importantly, Ancient Weapons in One Piece do not always conform to conventional weaponry. For instance, Shirahoshi exists as a living entity—a mermaid. While Uranus’s nature remains undisclosed, it, alongside Pluton, may also denote living beings intertwined with advanced technology.
Consider Laboon, a whale with mechanical constructs within, designed by Crocus. This implies that Pluton could be a similarly engineered creature. Notably, when Franky and Iceburg first reviewed the blueprints, they referred to Pluton as “a beast.”
“Is it even possible to build a beast like this?” — Franky
In the Wano arc, references to Pluton “sleeping” beneath Wano’s soil suggest that if it were simply a traditional ship, its inoperable state would not warrant such dramatics. Instead, Sukiyaki implies that breaking Wano’s barriers could unleash Pluton into the world.
Moreover, Oda himself has dropped hints towards Pluton’s whale-like nature. Franky, who has close ties to its design, is depicted with a whale-themed hairstyle in the Zou arc. This occurs in a narrative context where the Giant Whale Tree is introduced, hinting at underlying connections tied to these colossal beings.
The Purpose of Pluton: Drawing Parallels with Laboon



Should the theory of Pluton being a whale seem arbitrary, fans might consider Laboon’s actions. Laboon has frequently rammed its head against the Red Line, longing to reunite with the Rumbar Pirates. Yet, this behavior could have more profound implications. The Blue Whales in the New World bear similar scars, hinting that these creatures might share a collective memory or duty dating back to the Great War endured during the Void Century.
This shared calling may resonate with the vision of dismantling the Red Line. Nonetheless, no ordinary whale could undertake such a monumental task—unless, of course, it harnesses the energy of the Sun, assimilating it into an Ancient Weapon framework. It is plausible that Pluton’s ultimate goal is to obliterate the Red Line and liberate the world, paving the way for the mythical All Blue.
Notably, Chapter 1138 introduces a mural depicting the First and Second Worlds, showcasing Joy Boy leading a host of allies into conflict, which intriguingly features a large whale carrying two individuals, one of whom is speculated to be Momonosuke.
One Piece can be explored through various platforms like Viz Media and is available to read for free on Shonen Jump and the Manga Plus applications. The anticipated release date for chapter 1139 of One Piece is February 9, 2025.
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