This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Pixie (Cornish)
A pixie (also called pisky, pixy, pixi, pizkie, piskie, or pigsie in parts of Cornwall and Devon) is a mythical creature of British folklore. Pixies are speculated to be particularly concentrated in the high moorland areas around Devon and Cornwall, suggesting some Celtic origin for the belief and name. In the modern era, they are usually depicted with pointed ears, often wearing a green outfit and pointed hat.
Traditional stories describe them as wearing dirty, ragged bundles of rags, which they discard for gifts containing new clothes. In other depictions, their eyes are described as being pointed upwards at the outer end. In traditional regional lore, pixies are generally benign, mischievous, short of stature, and childlike; they are fond of dancing and wrestling outdoors, of which they perform through the night.