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days have passed since it was trimmed without being deposited in the PC, or if it is deposited in (Generation VI) or withdrawn from (Generation VII) the PC.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 dog-like Pokémon with thick, white fur that covers its black body apart from its paws and face. It has round eyes with blue eyelids and red irises, a pointed snout with a round nose at the end, and long rectangular ears. When its mouth is open, two pointed teeth can be seen on its upper jaw.
This Pokémon's furry coat cushions it against physical attacks, though cutting it increases the swiftness of its movements. It used to guard the king in the ancient times of Kalos. Like some real-world poodles, some domesticated Furfrou are commonly seen with their fur trimmed into various styles. Furfrou is known to be loyal to its Trainer, and only allows someone it trusts to trim it. In the past, aristocrats would even compete over who could trim its fur into the most exquisite style.
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.
A Kabuki Trim Furfrou appeared in A League of His Own!, under the ownership of Everett. Everett used it in his battle against Ash, where it faced off against Pikachu but was eventually defeated.
A Trainer's Heart Trim Furfrou appeared in SM099. It encountered an Eevee, who tried to greet it, but it wasn't impressed by Eevee's look. It was then called away by its Trainer. It later appeared when Eevee and Popplio were running away from an AlolanPersian, and it was nearly hit by Aqua Jet.
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.