It is not known to evolve into or from any other Pokémon.
Furfrou can have its hair trimmed into nine different styles to change its appearance. The styles include the Star, Diamond, Heart, Pharaoh, Kabuki, La Reine, Matron, Dandy, and Debutante Trim. A trimmed Furfrou will revert into its Natural Form if five days have passed since it was trimmed without being deposited in the PC, or if it is deposited in (Generation VI) or withdrawn from (Generation VII) the PC.
Furfrou is a quadruped, canine Pokémon with thick, white fur that covers its black body apart from its paws and face. The fur is thicker and fluffier around its head and tail. It has round, red eyes with blue eyelids, a pointed snout with a round, light blue nose, and long rectangular ears. When its mouth is open, two pointed teeth can be seen on its upper jaw.
Furfrou is commonly seen with its fur trimmed and dyed into various styles. However, only those it trusts are allowed to cut its fur. In the past, aristocrats would even compete over who could trim its fur into the most exquisite style. Cutting its fur increases the swiftness of its movements. It used to guard the king in the ancient times of Kalos and is known to be loyal to its Trainer.
Multiple Furfrou appeared in Grooming Furfrou!, including one that belonged to Jessica. It initially did not approve of her as its Stylist and thus she had difficulties with it, but their relationship improved after Team Rocket attempted to steal it.
A Matron Trim Furfrou appeared in Awakening the Sleeping Giant!, under the ownership of Princess Allie. It was used in a battle against Ash, during which it was shocked by Pikachu's Thunderbolt. Because its fur was ruined in the process, and she was not content with Furfrou battling without looking beautiful, Allie forfeited the match.
A Dandy Trim Furfrou appeared in Dreaming a Performer's Dream!, under the ownership of Kayleigh. It competed with its Trainer in a Rookie Class Pokémon Showcase. However, their performance was interrupted by a Pancham that appeared onstage and began imitating Furfrou's moves. After Pancham broke a stage lamp and fell on the stage, it ran off the stage in fear.
Three Furfrou appeared in SM124. They were about to be trimmed by Scissors Yoko when a Kartana showed up and trimmed them instead. With their new trims, they resembled AlolanVulpix and Ninetales, and Arceus, respectively. Although Scissors Yoko was unhappy with their new trims, the Furfrou were quite pleased.
In Kangaskhan...Kangascan't, an illusion of a Furfrou appeared under the ownership of Celosia, disguised as a Furfrou stylist. Shauna encountered it in an alleyway, which she mistakenly believes to be her missing one. She quickly realizes it actually belongs to the stylist who trims it into the Pharaoh, Debutante, Dandy, and Matron Trims. It disappears after Shauna had been possessed by Celosia's Honedge.