Koromori

Koromori is a blue, spherical Pokémon, resembling a Honduran White Bat. It is covered in shaggy fur and has a large, piggish nose with a heart-shaped nostril. Two tufts of shaggy fur hide its eyes, and its mouth has a single fang in the center of its upper jaw. There are two relatively small, black wings on either side of its body.

Koromori's nose serves various purposes: It uses ultrasonic waves from its nostrils for echolocation, and it can also be used to grip walls as Koromori sleeps, which leaves heart-shaped marks on the walls of caves. A Koromori's heart-shaped mark is said to give good fortune to whoever its leaves its mark on. Koromori preys on bug Pokémon. Koromori are known to live in caves and dark forests.

(Source: Bulbapedia)