Six travelers will rotate among the first room on a six-day cycle: a Hiker, a Waiter, a Madame, a Maid, a male Tourist, and a Backpacker (in that order); as the player talks to these travelers on different days (at any hotel), they will gradually open up to the player. A female Tourist who gives out Ribbons will also occupy the second room every Sunday and Thursday.
A monorail will take the player between the seaside and hillcrest halves of the city.
In the hillcrest side of town, after defeating the Champion, Tierno can be found on the cliffs overlooking the monorail tracks. Each day, he will ask to see a Pokémon with a dance move, asking for a specific one at random. If the player shows him one, he will give a Heart Scale.
These items can be obtained from the rotating guests appearing at Hotel Coumarine, provided the player has met the same guest on three other occasions. These guests can be met at any hotel located outside of Lumiose City.
In the anime, Coumarine City is very much like its in-game counterpart. The city is divided into two sections that are connected by a monorail, but it is also possible to travel between them without the monorail by way of a path that goes over a hill that is largely devoted to Ramos's Grass-typePokémon ranch. Also, the Pokémon Center is located in the southern part of the city.
In A Showcase Debut!, Serena and Jessie made their debut as Pokémon Performers in the town's Pokémon Showcase Rookie Class. However, they both lost in the Theme Performance. Shauna, who also entered the event, was the most voted Performer of the round and was declared the winner of the competition. The next day, Serena decided to change her look by shortening her hair and changing her outfit. After the group's stay in Coumarine City, they left for Ash's Gym battle with Clemont at the Lumiose Gym.
Coumarine City is the only city or town in the Pokémon world to consist of two geographically separate sections.
Coumarine City is similar to Celadon City in the Kanto region, as both cities host the Game Director, both have Gym Leaders who specialize in Grass-type Pokémon who are the fourth Leaders of their respective regions, both have names that start with the letter "C", and both have a hotel.
Coumarine City's real-life counterpart is likely Le Havre, the largest port in northern France.
ヒヨクシティ Hiyoku City
From 比翼 hiyoku (wings abreast), 比翼香 hiyoku-kō (name of a fine incense), and forms the phrase 比翼連理 hiyoku-renri (conjugal union) with レンリタウン Renri Town (Couriway Town)