Zorua

Zorua is a slate gray, fox-like Pokémon with red and black accents. Its ears are triangular with dark insides, and it has a large tuft of fur tipped with red on top of its head. It has greenish blue eyes with red eyelids. There are circular, red markings above the eyes that resemble eyebrows. Its muzzle is short and tapered with two small fangs seen in the upper jaw when its mouth is open. Zorua possesses a ruff of black fur around its neck and four short limbs tipped with red. Its tail is short and bushy. Zorua can change its physical appearance, though this transformation is merely an illusion as it keeps its own type and moves.

Zoura is said to have a timid nature which lead to the development of its illusion abilities, Zorua keeps its true form hidden to ensure its safety, and takes on the appearance of other Pokémon to frighten off enemies. Sometimes it will take the form of a silent child in order to search for food. It have been known to occasionally replace normally talkative child. As seen in its movie debut, the tail of an unpracticed Zorua may remain when it takes on a human form, and if the tail is touched, it will revert to its true form. Zorua is mischievous and loves to surprise others.

(Source: Bulbapedia)