From The Pokemon Insurgence Wiki

A Gym is a place where Pokémon Trainers go to train their Pokémon. Just like real life gymnasiums, where one can go to work out and build physical strength, Pokémon Gyms are places where Trainers can go to sharpen their battling skills and where their Pokémon can go to gain experience.

Often specializing in a particular type, Gyms create an environment which allows Trainers to test both their skills and Pokémon against those of others. The most powerful Trainer in a given Gym is called the Gym Leader, who is revered by both the lower-ranking members of the Gym and local fans. In the games, there is a character that usually stands near the front door of each Gym, giving tips on how to beat the Gym's challenges.

Official Gyms

Gyms that are certified by the Pokémon League are vital to a Pokémon Trainer's journey. Leagues are designed so that conventional Trainers must travel far and wide before entering a League Competition, as the only way to enter one is by gaining at least eight official Gym Badges, and there can only be one official Gym per city. Usually, the Gyms are designed to follow and suit the type that the Gym specializes in.

List of Gyms

Gym Badge Type Leader
Suntouched Gym Thermal Badge.png
Thermal Badge
Fire Orion
Vipik Gym Stinger Badge.png
Stinger Badge
Bug Xavier
Helios Gym Summit Badge.png
Summit Badge
Flying East
Sonata Gym Paragon Badge.png
Paragon Badge
Fairy Harmony
Kepler Gym Circuit Badge.png
Circuit Badge
Steel Anastasia
Selene Gym Dreamland Badge.png
Dreamland Badge
Psychic Diana
Amphitrite Gym Rainstorm Badge.png
Rainstorm Badge
Water Calreath
Erebus Gym Tartarus Badge.png
Tartarus Badge
Dark Adam

Gym appearances