Koromori is a bat Pokémon with the species typical black wings. The wings are attached to the back of the head, which also is the only body it has. The head has white fur, and its eyes even seem to be covered by hair for most time. This probably refers to the fact that that many bats navigate during the hunt through the use of ultrasonic sounds rather that vision. In the middle of the face Koromori has a pink nose, which's nostrils together creates a heart shape, and below it there is a big mouth with a constant happy smile. The species have a single fang in the middle of the upper jaw.