As pointed out by Hermione in Arriving in Style!, Stylists and Coordinators have a very similar role, as both kinds of Trainers aim to showcase their Pokémon's charms in a stylish manner. It should be noted, however, that while a Coordinator concentrates on showing off a Pokémon's style by displaying its moves and skills in an appealing way, a Stylist focuses on designing clothing items that are likely to bring out a Pokémon's inner beauty and enhance their outward appearances.
Pokémon Stylists can also take part in Pokémon competitions such as the Hearthome Collection, a fashion show where contestants dress up and model their Pokémon in their own original designs. Additionally, they may open up their own fashion stores. The Trainer class is widely popular in Sinnoh, but is also well-known in at least one other region of the Pokémon world, as Lila said in Battling The Generation Gap! that she was given the chance to study to become a Pokémon Stylist abroad.
The Poké Chic fashion magazine is a publication that caters to Pokémon Stylists and trend-conscious Trainers. According to Hermione, Poké Chic's editor-in-chief, the public interest for Pokémon styling increased after Paris achieved success as a highly skilled Stylist. This inspired many people to become a Stylist as well.
