Paramecia

Paramecia is the name given to a type of Devil Fruit. These fruits give the eaters a "super-human" power, usually the affect 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, Luffy's Gomu Gomu no Mi is always active, meaning that he's a rubber human at all times. Other users, like Robin or Miss Doublefinger must mentally activate the changes in their bodies, while again others like Foxy and Mr. 5 can't change their bodies at all. 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.

List of Known Paramecia Fruits

 * Gomu Gomu no Mi - English Dub: Gum Gum Fruit
 * Bara Bara no Mi - English: Chop Chop Fruit
 * Sube Sube no Mi - English Dub: Slip Slip Fruit
 * Kilo Kilo no Mi - Same name for the original Japanese version and the English dub.
 * Bomu Bomu no Mi - English Dub: Bomb Bomb Fruit
 * Hana Hana no Mi - 4Kids/Funimation: Hana Hana Fruit; Viz: Flower Flower Fruit
 * Doru Doru no Mi - English Dub: Wax Wax Fruit
 * Baku Baku no Mi - English Dub: Munch Munch Fruit
 * Mane Mane no Mi - English Dub: Clone Clone Fruit
 * Toge Toge no Mi - English Dub: Spike Spike Fruit
 * Supa Supa no Mi - English Dub: Dice Dice Fruit
 * Ori Ori no Mi - English Dub: Cage Cage Fruit
 * Bane Bane no Mi - English Dub: Spring Spring Fruit
 * Noro Noro no Mi - English Dub: N/A
 * Doa Doa no Mi - English Dub: N/A
 * Awa Awa no Mi - English Dub: N/A
 * Beri Beri no Mi - English Dub: N/A
 * Sabi Sabi no Mi - English Dub: N/A
 * Shari Shari no Mi - English Dub: N/A
 * Yomi Yomi no Mi - English Dub: N/A
 * Kage Kage no Mi - English Dub: N/A
 * Horo Horo no Mi - English Dub: N/A
 * Suke Suke no Mi - English Dub: N/A
 * Nikyu Nikyu no Mi- English Dub:N/A
 * Goe Goe no Mi - English Dub: N/A
 * Kama Kama no Mi - English Dub: N/A
 * Hiso Hiso no Mi - English Dub: N/A
 * Kachi Kachi no Mi - English Dub: N/A
 * Samu Samu no Mi - English Dub: N/A
 * Gero Gero no Mi - English Dub: N/A
 * Nemu Nemu no Mi - English Dub: N/A
 * Atsu Atsu no Mi - English Dub: N/A
 * Mini Mini no Mi - English Dub: N/A

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. Doflamingo, Kid, Law, Bonney, Capone, Hawkins, Urouge and Apoo have such as these.
 * Doflamingo - Puppetry?
 * Kid - Magnetic?
 * Law - Replacement?
 * Bonney - Age Manipulation?
 * Capone - Human fortress?
 * Hawkins - Voodoo dolls, Tarot cards and Fortune telling, possibly witchcraft? (Due to his previous mentions of clothes, and the state of his arm when he produced his dolls, Threads or Sewing or Straw?)
 * Urouge - Muscle Mass Increase? (could also be Life Return)
 * Apoo - Music/Sound?