Diadem City

Diadem City (ダイアデム市 Diadem City) is a port city on the west coast of the Hora Region. Pokémon Trainers often visit Diadem City to earn the Plasma Badge from Vinette, the Gym Leader, who specializes in Grass-type Pokémon.. It's motto is "Merry Home for Sailors".

Diadem Pokémon Gym
Aside from being a standard Gym where Trainers battle to earn a Badge, Vinette enjoys taking care of Trainer's Grass-type Pokémon, making the Gym the equivalent to a Day Care for Grass-type Pokémon.

Move Tutor
On the left side of the city, in a house high up on the cape, there is a House where one can find a Move Tutor. Two actually. Grandma Wilma will teach the move Draco Meteor when she meets a Trainer with a Dragon-type Pokémon who have the "potential" to master it. And an old man will teach Frenzy Plant, Blast Burn and Hydro Cannon to the fully-evolved Grass-, Fire- and Water-type starter Pokémon, respectively. They teach the moves for free.

Demographics
Diadem City has a population of 65.