Paramecia

Paramecia is the name given to a type of Devil Fruit. These fruits give the users a "super-human" power which can affect their body or ability to manipulate the environment.

Strengths
The Paramecia fruits grant users an ability that can be classified only as 'Superhuman'. The Paramecia fruits also contain the greatest variation of powers evident so far in the One Piece story. These can be exploited and manipulated in a variety of ways, though the extent of useful attacks or strategies can depend greatly on the user themselves. Some people may encounter inspiration for a new attack after using a particular set of attacks for years, while others will never learn how to completely harness their skills.

Weakness
The Paramecia type is the only group containing powers or special traits that may be considered 'useless' to the user, granting little or no real advantage whatsoever. Paramecia types are also considered the easiest to battle, since they can be predictable and often display their full abilities within a very short period of time(as noted by Enel).

Although other Devil Fruit types may also lead to the user being considered a "freak", none are more noted for this then the Paramecia group. This is due to some of the abilities granted by Paramecia fuits being considered far too strange or frightening for normal people to accept.

Other information
Paramecia are the most common type of Devil Fruit. They come in a variety of forms which can be divided into several subcategories.

With such a broad range of available powers, it is difficult to generalize the abilities offered by Paramecia fruits. However, it appears that the effects of this Devil Fruit type can be categorized into two basic groups: those which are based on a characteristic (such as elasticity or slowness) or an object (Bombs, doors, etc.) Paramecia types are also distinguishable in the manner in which their powers manifest. They can either alter the user's current physical state (Luffy and Bon Kurei), directly affect their immediate environment (Eustass Kid and Blueno), or affect both of these conditions (Bonney).

How to trigger the fruit’s power can also differ from user to user. For instance, Gomu Gomu no Mi and Yomi Yomi no Mi have powers that are active at all times, while others such as the Noro Noro no Mi and Hana Hana no Mi require self-activation.

List of Known Paramecia Fruits

 * Gomu Gomu no Mi (English versions: Gum-Gum Fruit): Gives the user a body made of rubber.
 * Bara Bara no Mi (English versions: Chop-Chop Fruit): Allows the user to split their body into separate parts. Also gives them immunity to blades.
 * Sube Sube no Mi (English versions: Slip-Slip Fruit/Smooth-Smooth Fruit): Makes user slippery. In Alvida's case, the fruit caused extreme weight-loss and a change in her complexion.
 * Kilo Kilo no Mi (English versions: Kilo-Kilo Fruit): Allows the user to change their body weight.
 * Bomu Bomu no Mi (English versions: Bomb-Bomb Fruit/Boom-Boom Fruit): Turns the user's body and secretions into bombs. (Mr. 5 was able to use this fruit's powers to create "booger bombs.")
 * Hana Hana no Mi (English versions: Hana-Hana Fruit/Flower-Flower Fruit): Allows the user to grow extra limbs on surfaces.
 * Doru Doru no Mi (English versions: Wax-Wax Fruit): Allows the user to create and manipulate wax.
 * Baku Baku no Mi (English versions: Munch Munch Fruit): Allows the user to eat anything and merge with it.
 * Mane Mane no Mi (English versions: Clone-Clone Fruit): Allows the user to physically transform into another sentient being.
 * Toge Toge no Mi (English versions: Spike-Spike Fruit): Allows the user to grow spikes from their body.
 * Supa Supa no Mi (English versions: Dice-Dice Fruit): Allows the user to form blades on their body.
 * Ori Ori no Mi (English versions: Cage-Cage Fruit): Allows the user to place shackles on opponents.
 * Bane Bane no Mi (English versions: Spring-Spring Fruit): Allows the user to turn their limbs into springs.
 * Noro Noro no Mi: Allows the user to slow objects and people for 30 seconds.
 * Doa Doa no Mi: Allows the user to create doors/portals in space.
 * Awa Awa no Mi: Allows the user to create and control soap bubbles.
 * Beri Beri no Mi: Allows the user to split body into orbs.
 * Sabi Sabi no Mi: Allows the user to rust metal.
 * Shari Shari no Mi: Allows the user to turn limbs into wheels.
 * Yomi Yomi no Mi: Grants the user a second life. However, once the user has been brought back from death, their power becomes inactive and they are merely left with their inability to swim.
 * Kage Kage no Mi: Allows the user to manifest and control shadows.
 * Horo Horo no Mi: Allows the user to control "Horo" ghosts whom they created.
 * Suke Suke no Mi: Allows the user to become invisible.
 * Nikyu Nikyu no Mi: Allows the user to push anything they touch at the speed of light.
 * Mero Mero no Mi: Allows the user to turn others to stone. Only works if the victim is not in control of their emotions (usually those of lust or love).
 * Doku Doku no Mi: Allows user to manipulate poison.
 * Horu Horu no Mi: Allows user to manipulate hormones.
 * Choki Choki no Mi: Allows user to transform parts of their body into scissors. These can be used to slice and manipulate anything the user desires.

Filler

 * Goe Goe no Mi: Allows the user to create powerful sound waves by shouting. (Movie 1)
 * Kama Kama no Mi: Allows user to manipulate air into sharp projectiles. (Warship Island arc)
 * Hiso Hiso no Mi: Allows user to talk to animals. (Warship Island arc)
 * Kachi Kachi no Mi: Allows the user to harden their body and raise body temperature. (Movie 2)
 * Samu Samu no Mi (English versions: Chilly-Chilly Fruit): The user can only tell bad jokes. (SBS)
 * Gero Gero no Mi: Makes the user disgusting (SBS)
 * Nemu Nemu no Mi: Allows the user to induce sleepiness. (Ocean's Dream Arc)
 * Atsu Atsu no Mi: Allows the user to manipulate heat. (Ice Hunter Arc)
 * Mini Mini no Mi: Allows the user to change body size. (One Piece: Round the Land)
 * Noko Noko no Mi: Allows user to create and control poisonous mushroom spores. (Movie 9)

Unknown
Due to the vast amount of different Devil Fruits in the Paramecia class it is typical that not all of these powers, their extents and names are revealed during their first appearances. These possible powers (some not confirmed as Devil Fruits) are listed below:
 * Donquixote Doflamingo: Can manipulate others like puppets.
 * Eustass Kid (confirmed as a Devil Fruit): Can manipulate magnetic forces.
 * Trafalgar Law (confirmed as a Devil Fruit): Can manipulate anything (objects or people) inside a designated space. Law can separate and rejoin these objects at will.
 * Jewelry Bonney (confirmed as a Devil Fruit): Can manipulate the age of a person. (It has not been shown if she can manipulate the age of inanimate objects, as well.)
 * Capone Bege (confirmed as a Devil Fruit): Can become a human fortress, allowing subordinates and weapons to be stored inside his body.
 * Basil Hawkins (confirmed as a Devil Fruit): Can create straw voodoo dolls and use them to redirect physical damage from his own body. Damage incurred by the dolls will be exhibited by those whom the doll represents. Hawkins can also transform into a straw-man.
 * Urouge: Can increase muscle mass (Life Return or something similar is also possible).
 * Scratchmen Apoo (confirmed as a Devil Fruit): Can morph limbs into instruments and use sound or music as weapons.
 * An unknown user from Impel Down: Has the ability to tunnel. This user created a secret floor between Level 5 and Level 6 of Impel Down.
 * Lafitte: Can transform his arms into wings, granting him the ability to fly.