It is not known to evolve into or from any other Pokémon.
Cellance is an equine Pokémon which resembles a gilin or a deer. Its skin is pastel purple and has four short legs with yellow rings near the feet. The hind legs are pastel pink, with white crescent-shaped markings above them. There is a yellow crescent-shaped ornament on its chest. Cellance's head is pastel purple on the lower half, and the upper half is yellow, with pale blue-green eyes. It has a large, flowing white and pastel pink mane coming from its head which extends over its whole body, and its tail is similar in shape.
Because Cellance is genderless, there are no gender differences.
When you have beaten the Elite 4, go to Rassic City. In the Ancient Museum, go down the stairs, and at the top right, Rex will talk to you and will give you the Balance Crystal. You can go now fight Cellance at Sario Town. Put the 5 gems on each pillar and jump into the hole. Cellance will await you in its dimension.
Folklore speaks of a figure born from the clash of Solaran and Lunaro, one who controls the duo's power to bring balance to society. Such being is Cellance.