This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Trasgo (Spanish and Portuguese)
The trasgo, trasno or trasgu is a mythological creature present in the tradition of several cultures of what is now northern Spain, especially in Galician, Asturian and Cantabrian traditional culture. The trasgu is the best known being of Asturian mythology, and is shared with mythologies of Celtic origin, like Galicia's. It is a domestic goblin with a mischievous and nervous character.
It is often represented as a tiny man who limps with his right leg; he has dark skin, wears red clothes and a pointy red hat. He has a hole in his left hand. He is described at times as having horns, tail, sheep ears and long legs, and wearing a long black and gray cloak; at other times he is described as small, with long thin legs and wearing a tight dark brown dress.