Paramecia

Paramecia is the name given to a type of Devil Fruit. These fruits give the eaters a "super-human" power, usually it affects the eater's body in some way.

Strengths
Grants the user an ability that can be classified only as 'Superhuman'. The Paramecia fruits also contain the greatest variation of powers evident as they seem to offer the widest range of possibilities when it comes to how to exploit the ability granted to the User. Some people may encounter inspiration for a new attack after using a particular moveset for years while others will never learn how to completely use their skill.

Weakness
The Paramecia type is the only group containing the powers or special traits that are considered 'useless' to the user, granting little or no real advantage whatsoever. Paramecia types are also the easiest to fight against because while the strengths of their powers give them an advantage, they also make them easy to predict and often their abilities are displayed to their fullest within a very short period of time (as noted by Enel). Although other Devil Fruit types may also leave the user as a "freak", none are more noted for this habit then the Paramecia group, whose powers are often far too freakish for normal people to accept.

Other information
Paramecia are the most common of the Devil Fruits types. Paramecia fruits can be divided into several subcategories, as it is impossible to generalize the powers. For instance, Gomu Gomu no Mi and Yomi Yomi no Mi have powers that are active at all times. Others like Noro Noro no Mi and Hana Hana no Mi have powers that need self activation in order for them to use their abilities. They however all seem to come in two basic types. Whatever powers a paramecia fruit gives, it is based on the concept of either a characteristic like slipperiness or slowness, or an object like a bomb or a door. Paramecia types are also distinguishable in the manner in which their powers manifest, either by being altering their bodies current state (Luffy and Bon Kurei), or directly affecting their immediate environments (Eustass Kid and Blueno); though some users affect both (Bonney and Foxy).

List of Known Paramecia Fruits

 * Gomu Gomu no Mi (English versions: Gum-Gum Fruit) - Gives user rubber powers.
 * Bara Bara no Mi (English versions: Chop-Chop Fruit) - Allows user to split up body parts.
 * Sube Sube no Mi (English versions: Slip-Slip Fruit) - Makes user slippery/slims-down/changes complection.
 * Kilo Kilo no Mi (English versions: Kilo-Kilo Fruit) - Weight change.
 * Bomu Bomu no Mi (English versions: Bomb-Bomb Fruit/Boom-Boom Fruit) - Allows user to make body parts explode.
 * Hana Hana no Mi (English versions: Hana-Hana Fruit/Flower-Flower Fruit) - Allows user to create multiple limbs.
 * Doru Doru no Mi (English versions: Wax-Wax Fruit) - Allows user to turn into/manipulate wax.
 * Baku Baku no Mi (English versions: Munch Munch Fruit) - Allows user to eat anything and turn into it.
 * Mane Mane no Mi (English versions: Clone-Clone Fruit) - Mimicry.
 * Toge Toge no Mi (English versions: Spike-Spike Fruit) - Allows user to create spikes on body.
 * Supa Supa no Mi (English versions: Dice-Dice Fruit) - Allows user to create blades on body.
 * Ori Ori no Mi (English versions: Cage-Cage Fruit) - Allows user to place shackles on opponents.
 * Bane Bane no Mi (English versions: Spring-Spring Fruit) - Allows user to turn limbs into springs.
 * Noro Noro no Mi - Allows user to slow things down.
 * Doa Doa no Mi - Create passageways anywhere.
 * Awa Awa no Mi - Allows user to create and control soap bubbles.
 * Beri Beri no Mi - Allows user to turn body into orbs.
 * Sabi Sabi no Mi - Allows user to make metal rust.
 * Shari Shari no Mi - Allows user to turn limbs into wheels.
 * Yomi Yomi no Mi - Allows user to live a second time.
 * Kage Kage no Mi - Allows user to manifest and control shadows.
 * Horo Horo no Mi - Allows user to control ghosts.
 * Suke Suke no Mi - Invisibility.
 * Nikyu Nikyu no Mi - Allows user to push anything they touch.
 * Mero Mero no Mi - Allows user to turn someone's emotions against them.
 * Doku Doku no Mi - Allows user to manipulate or turn into poison.
 * Horu Horu no Mi - Allows user to manipulate hormones.

Filler

 * Goe Goe no Mi - Create sound beams by shouting. (Movie 1)
 * Kama Kama no Mi - Gives user claws/ability to attack with blades of air. (anime)
 * Hiso Hiso no Mi - Allows user to talk to animals. (anime)
 * Kachi Kachi no Mi - Gives user ability to turn hard as rock/heat body temperature. (Movie 2)
 * Samu Samu no Mi (English versions: Chilly-Chilly Fruit) - User only tells bad jokes. (SBS)
 * Gero Gero no Mi - Makes user disgusting (SBS)
 * Nemu Nemu no Mi - Sleep manipulation. (anime)
 * Atsu Atsu no Mi - Allows user to manipulate heat. (anime)
 * Mini Mini no Mi - Change size. (video game)
 * 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 - Puppetry?
 * Eustass Kid (confirmed as a Devil Fruit) - Magnetism?
 * Trafalgar Law (confirmed as a Devil Fruit) - Space Control?
 * Jewelry Bonney - Age Manipulation?
 * Capone Bege - Human Fortress?
 * Basil Hawkins (confirmed as a Devil Fruit) - Magical Straw (Voodoo usage and Scarecrow transformation)?
 * Urouge - Muscle Mass Increase (Could also be Life Return or something similar)?
 * Scratchmen Apoo - Music/Sound?
 * An unknown user from Impel Down - Some tunneling ability.