The Striaton Gym is based on a butler café. Aside from the lobby, it consists of three different rooms that are behind three different curtains. In the first two rooms, two sets of a table and two chairs are set symmetrically to the sides of the Gym, with three circular panels situated in the middle. The first is a green panel with a leaf symbol, signifying Grass. The second is a red panel with a flame symbol, signifying Fire. The third is a blue panel with a rain droplet symbol, signifying Water. The player must step on the panel that has the type advantage of the symbol displayed on the curtain. The curtain will open if the right panel is stepped on. The third room however, is a much bigger room, containing two big round tables with four chairs around each at both sides of the Gym. It also contains a small set of stairs leading to a platform where the Gym Leaders stand.
The chosen starter Pokémon determines which Gym Leader is battled. If Oshawott is chosen, Cilan will be battled; if Tepig is chosen, Cress will be battled; if Snivy is chosen, Chili will be battled. The Gym also has a dual purpose as a restaurant.
Pokémon Black 2 and White 2
During the two years between Black and White and Black 2 and White 2, the three brothers retired from being Gym Leaders in order to train. The former Gym has been converted into a full-fledged restaurant, where it is possible to team up with one of the three brothers in a Multi Battle against the other two once per day.
The Striaton Gym first appeared in Triple Leaders, Team Threats. It is a very posh building with pillars on the outside and a glass topped roof. Through the front doors is a café where Chili, Cilan, and Cress are waiters. The walls of the café open up to reveal a passageway to the battleground. The battleground features rocky terrain on the battlefield, as well as an area for spectators to cheer on their friends during battle.
As soon he learned of the Gym, Ash rushed there for a Gym battle, only to find himself in the middle of a café. After a few moments of confusion, Ash got his wish through and his Gym challenge was accepted. However, much to Ash's surprise, he was allowed to choose which one of the three Gym Leader brothers he would want to battle. To everyone's astonishment, Ash declared that he'd want to battle all three Gym Leaders, with beating two out of three being enough for the Gym Badge. First Ash battled Cress and his Panpour with Pikachu, but lost. Next he faced Chili and his Pansear with his Tepig, and won. Lastly, Ash confronted Cilan and his Pansage with his Oshawott. He eventually beat the third Gym Leader, earning himself the Trio Badge. Later, Cilan decided to join Ash and Iris in their Unova travels, leaving the Gym in his brothers' hands.
The Gym appeared in a flashback in A Connoisseur's Revenge!, where Chili and Cress were telling Burgundy that Cilan had gone on a journey and could not battle her again. She instead battled Chili and won.
The Gym appeared in another flashback in A Call for Brotherly Love!, when Cress called Cilan and revealed that Chili had left the Gym after a depressing losing streak. After training with Cilan, Ash, and Iris for a while in Driftveil City, Chili returned to the Gym.
In Survival of the Striaton Gym!, it was revealed that the Striaton Gym had been challenged by a Trainer named Morana, who, instead of a Gym Badge, wanted the whole Gym for herself if she won. She easily defeated both Chili and Cress, but was later defeated by Cilan at Paladin Island, securing the Gym's future.
Pansage is Cilan's only known Pokémon. Along with being his main Pokémon, Pansage assists Cilan and his brothers in the kitchen by mixing herbs for tea. It was used in the battle against Black, Cheren, and Bianca and defeats Bianca's Oshawott by shattering its scalchop and smashing it into a wall. Despite being powerful, Pansage was defeated when Tep uses its previously dropped leaves to revive itself, Oshawott, and Snivy, which allowed them to win the battle.
Pansear is Chili's only known Pokémon. Along with being his main Pokémon, Pansear assists Chili and his brothers in the kitchen by boiling water for tea. It was used against Black, Cheren, and Bianca in a Gym battle. Despite proving powerful, Pansear was defeated by a water-soaked scalchop and was the only one to be knocked out. This loss causes the challengers to win with 3 to 2 after the time limit expired.
Panpour is Cress's only known Pokémon. Along with being his main Pokémon, Simipour assists Cress and his brothers in the kitchen by pouring water for tea. It was used against Black, Cheren, and Bianca in a Gym battle. Despite proving powerful, they are defeated after the time limit ends after Chili's Pansear is defeated, making the challengers' win with 3 to 2.