Devil Fruit

Devil Fruits (Akuma no Mi) are mysterious fruits that appear throughout the One Piece world, granting strange and occasionally wacky abilities to whoever consumes them.

General Information
The origins of the Devil Fruits are a mystery and the exact number of them is unknown. Though they can be found all across the world, Devil Fruits become more common when one enters the Grand Line. Upon consumption, they grant the eater an ability. However, the consumer forever loses the ability to swim supposedly as the sea rejects the spirit of the Devil within the fruit that is transferred to the consumer. According to one legend, these spirits also abhor each other and will destroy each other if one were to consume two Devil Fruits. While the veracity of this legend has yet to be verified, it is true that eating two Devil Fruits will cause one to self destruct thus preventing one from acquiring two Devil Fruit abilities. The sole exception to this is Marshall D. Teach, better known as Blackbeard, who was able to gain the abilities of the Gura Gura no Mi from the slain Edward "Whitebeard" Newgate while also holding the Yami Yami no Mi.

Though incomplete encyclopedias of Devil Fruits exist, many have yet to be recorded or discovered which can add a layer of uncertainty to their consumption. However, as stated by Rob Lucci, while one may be granted a less than desirable power one is also unlikely to become weaker from consuming one making the inconvenience of not being able to swim worth the trade.

Devil Fruits can be categorised into one of three types: Paramecia, Zoan and Logia. Comically, all Devil Fruits are said to taste terrible.

Paramecia
The most common of the three kinds of Devil Fruits, Paramecia Type Devil Fruits are best described as granting the consumers a "superhuman" ability, such as the ability to stretch like Rubber (Gomu Gomu no Mi), that does not fall into either of the Zoan or Logia categories. Despite being the most common type, it does not make it the weakest as many Paramecia Devil Fruits can possess highly destructive of powerful abilities, such as Whitebeard's Gura Gura no Mi. This means that a Paramecia Devil Fruit can make even a physically weak person into a dangerous combatant.

As the most common and diverse type of Devil Fruit, those in this classification have the greatest chance of granting the consumer a "Useless" ability. However this is almost entirely dependent on the consumer themselves with many holding abilities that might be more or less useful in a given situation or based upon their personal experience. For example, Luffy initially found his Rubber Body granted to him by the Gomu Gomu no Mi to be more of a hindrance to himself until he began to realize its true potential after years of training.

The primary weakness of a Paramecia Devil Fruit is that they're very likely to display the full extent of their ability early on, which can lead to many becoming fairly straightforward to fight when in the hands of certain users. However inventive combatants, such as Luffy, can often find new ways with which to employ their abilities to overcome this supposed shortcoming.

Special Paramecia
Within the Paramecia's there exists a small number of Paramecia fruits that grant Logia-esque abilities beyond merely the generation and manipulation of substance, enabling the transformation into the substance, most notably the Mochi Mochi no Mi eaten by Charlotte "Dogtooth" Katakuri. The only defining difference between these fruits and Logia Type fruits is that the substance, in Katakuri's case Mochi, is a man made substance rather than a naturally occurring element.

Zoan
Perhaps the most straightforward of the Devil Fruit categories, the Zoan type grants the consumer Animal-based transformation, primarily that of a Beast and Man-Beast Hybrid form. The primary advantage of these fruits is that they can provide a physical enhancement to the consumer along with the properties of the subject of the transformation, such as the wings of an Eagle or the claws and fangs of a Leopard.

This Type also makes frequent usage of "Models", such as the Inu Inu no Mi, Model: Jackal and Inu Inu no Mi, Model: Dachshund which both grant the user the ability to transform into Canines though of different breeds/sub-species. It is also noted that Carnivorous animals often grant the user more obvious combat advantages and a Zoan Fruit is the most likely to affect the temperament of the consumer.

Ancient Zoan
A Sub-Classification of Zoan fruits that enable the user to transform into Ancient or Extinct kinds of Animals, such as X Drake and his Ryu Ryu no Mi, Model: Allosaurus. These fruits are both rare and considered more powerful than a traditional Zoan Fruit.

Mythical Zoan
The rarest classification of Zoan, and considered the rarest classification of Devil Fruit overall, these fruits grant the user the ability to shift into the forms of Mythical/Legendary Creatures, such as the Phoenix (Marco's Tori Tori no Mi, Model: Phoenix) or Kaido's unnamed Devil Fruit that allows him to transform into an Eastern Style Dragon. Not only are these fruits extremely rare, they are also often extremely powerful granting the user abilities that can outstrip those of a Paramecia or Logia, such as the Tori Tori no Mi, Model: Phoenix granting the user regenerative flames.

Logia
Considered both Rare and Powerful, a Logia devil fruit grants the consumer the ability to transform, generate and manipulate the element associated with the fruit. This is not limited to the traditional element such as Fire or Light (Mera Mera no Mi and Pika Pika no Mi) but also other naturally occurring substances such as Sand (displayed by Crocodile and his Suna Suna no Mi). For a fruit to qualify as a Logia it must grant the all three aspects of its ability (Generation, Manipulation and Transformation). The sole, known, exception to this rule is the Yami Yami no Mi which does not allow the user to become intangible and instead makes them more vulnerable to damage though in exchange for the ability to nullify other Devil Fruit powers.

This category provides some clear advantages over the other three which make them highly sought after. By transforming into their elements, one can become immune to most forms of attacks via a sort of intangibility (such as swords passing through smoke). The amount of the element on can generate is seemingly limitless, rendering the users of some fruits capable of immense levels of destruction to the point of permanently altering the climate of an island as shown by Punk Hazard, which became divided into two climates (One permanently freezing and the other permanently burning) following the Ten-day long clash between Former Admiral Kuzan and Current Fleet Admiral Sakazuki, both powerful Logia users holding the Hie Hie no Mi and Magu Magu no Mi respectively. Furthermore the manipulation of ones element is not limited to that which one generates but also that which exists in nature around them, such as Crocodile being able to manipulate the sands of Alabasta in tandem with his own.

Though a Logia can grant one immense power, a consumer of a Logia is far from invincible and this perception of invincibility can lead many Logia Users to become overconfident in their ability. The transformation into ones element must be done consciously, though many Users have trained to the point that their transformations happen on reflex. Furthermore, one may be robbed of their intangibility via exposure to a certain substance (Crocodile became vulnerable to conventional attacks upon his body becoming wet as Sand sticks together when damp) or when exposed to a "superior" element, such as Ace being burned by Sakazuki due to the Magu Magu no Mi's Magma being superior to the Mera Mera no Mi's Fire. Logia users also generally have the most to fear from Busoshoku Haki which is capable of striking them as though they were tangible, making transforming into ones element against a Haki user often more dangerous than it's worth. One may also be rendered inert and unable to reform via psychological means, as shown when Monet (who ate the Yuki Yuki no Mi) was unable to reform her body due to the sheer terror of facing Roronoa Zoro who could've easily killed her had he used Haki. Though many who eat Logia fruits are far from fragile, most eaters are often shocked when and if they're struck.

Artificial Devil Fruit
Through the discovery of the Lineage Factor by Dr. Vegapunk and Vinsmoke Judge, research was undertaken into how exactly Devil Fruits affect the body and whether they could be replicated. A single prototype was created by Dr. Vegapunk, though it was deemed a failure, and was subsequently eaten by Momonosuke (granting the child the ability to transform into an Eastern Style Dragon similar to Kaido's unnamed ability). Artificial Devil Fruits can be identified by possessing spot patterns as opposed to the naturally occurring spirals on true Devil Fruits. However, they still remove ones ability to swim.

SMILES
Through the application of SAD, a substance created by Casear Clown, Donquixote Doflamingo and Casesar Clown were able to mass manufacture Artificial Devil Fruits dubbed SMILES which were sold primarily to the Beasts Pirates of the Yonko, Kaido, creating the group known as the "Gifters". Thus far, these abilities have been limited only to Animal Abilities. Unlike normal Devil Fruits, SMILES are said to actually taste good.

Unlike traditional Devil Fruits, SMILES are classified by the convention of "(Species Name) SMILE". Unlike a traditional Zoan, SMILES have demonstrated granting their users the ability to transform certain parts of their body into Animal Parts, such as Sheepshead transforming his his hands into Horns. These fruits can also give their consumers traits of the associated animal, such as enhanced senses.

Due to their artificial nature, these fruits are prone to having side effects. Only one in ten SMILES successfully grant the user an ability, though all still rob them of their ability to swim, with the failures also stripping their consumer of the ability to express negative emotions (hence why they're called SMILES). Another notable effect is that instead of granting transformative abilities or animal features, one can instead grow an actual animal out of their body. These animals are fully alive and possess a will of their own, often acting as much of an inconvenience as a boon due to them resisting the commands of the SMILE user (even attacking them).