Mato Mato no Mi in One Piece

At some point in the past, Vander Decken IX consumed the Mato Mato no Mi (Mark-Mark) Devil Fruit.

The fruit’s appearance is unknown.

Strengths

The main ability of this fruit is that it gives the user the ability to point their hands at whoever they come in contact with. Also, the user can memorize as many targets as he has (in Decken’s case, two hands). After the target’s memory is imprinted on the user’s hand, they can easily target the subject from any place and at any time, whether or not they are aware of the subject’s precise location. The thrown objects will continue aiming at the targets even if they move from their current positions and will promptly alter their trajectory to track the targets. The ability can be used as a kind of homing device outside of battle to locate the target.

It is particularly a dangerous ability because it can really attack with more focus due to the distance and acceleration of the missile the user is firing, where its acceleration increases the force of the attack, which has the potential to be lethal. Apparently, the missile’s momentum increases with increasing distance between the attacker and the target.

Additionally, if the user’s chosen target is even somewhat close to them, the missile will even turn back, like a boomerang returning to its thrower. Also, the objects used to target the recipients can still travel underwater while the user is affected by the sea water, without the sea altering or decreasing the intended purpose.

Although, any object can be used as a missile, including inanimate objects and living things, this power cannot mark inanimate objects as targets. For example, when Decken used his hands to mark his targets, the mark was not changed when the hand came in contact with the missile he was about to throw.

Weaknesses

While this ability can send things towards the target, the user has no control over the direction or trajectory of the object; instead, it will simply follow a path to the target, passing anything in its path. Despite this, even at close range, there is no certainty that the thrown object will even hit fatally.

Additionally, despite the enormous force of the flung projectiles, they can still be stopped by objects or strong individuals, in which case the fruit’s ability is nullified and the object returns to being stationary. It won’t always function exactly like a homing device, and as Decken himself acknowledged, there are ways to shield oneself from his power. This was demonstrated when an ax that Decken threw lost track of its intended target.

In order to keep being able to target a certain individual, the user must keep the hand that touched them from physically contacting anyone else. It makes sense that Decken could be greatly outmatched in long-range battle against someone he has never marked before because he must “mark” the victim by touching them with his hands. The user can only mark living things, and the throwing ability is lost when a target dies. Furthermore, the impact will be reversed if the user passes away or becomes unconscious while an object is pursuing its target, as shown when Decken fell unconscious.

Apart from these, the user is still vulnerable to the standard Devil Fruit flaws, as shown by Decken, a fish-man, who must coat his ship and leave from it in a Flutter Kick Coating.

Decken has mainly used the fruit’s abilities to threaten Princess Shirahoshi with marriage and even attempted to kill her by firing bullets at her from far distance. To stop all incoming missiles, the princess was imprisoned in the Hard-Shell Tower for ten years. Decken can only find other targets with his left hand because he keeps his right hand memorized with Sirahoshi’s touch. Decken’s abilities were described as a curse, to which he himself agrees.

Q. Who has the Mato Mato no Mi?

A. Vander Decken IX has the Mato Mato no Mi.

Q. What does the Mato Mato no Mi do?

A. The Mato Mato no Mi enables its user to aim at any “target” from any location and at any time with ease.

Q. Is Vander Decken IX a fish-man?

A. Yes, Vander Decken IX is a fish-man.