Gyms that are certified by the Pokémon League are vital to a Trainer's Pokémon 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.
List of Gyms
There are eight known official Gyms in each region. In the anime, Gary Oak reveals that he has more than eight Badges, hinting that there are more Gyms than players are given access to in the games. Specifically, he has at least ten badges excluding the Earth Badge.
Before the Indigo League competition, Ash encounters Otoshi in Bad to the Bone; he owns eight badges, but only shares four in common with Ash. Later in the episode, another Trainer appears with eight other completely different badges. In total, Ash, Gary, Otoshi and the other Trainer displayed 27 different types of badges prior to competing in the Indigo Plateau Conference, so there must be at least this number of official gyms in Kanto. This is however impossible because there aren't 27 cities in Kanto listed in the games. The anime however shows many different cities and towns where badges could be obtained.
Whilst on her journey collecting badges, Sakura collected badges from both Kanto and Johto, so it is unclear what the rules are for competing in championship tournaments.
At the Hoenn Pokémon League Championship, Morrison is shown to have an eighth badge different from Ash's, suggesting that there are at least 9 official gyms in Hoenn. Many believe it could be a badge fromSlateport or Pacifidlog.
During Barry's Busting Out All Over!, in the Sinnoh saga, Barry was seen to have a badge that is not present in the games and most likely will not be possessed by Ash.
Kanto
Pewter Gym
Cerulean Gym
Vermilion Gym
Celadon Gym
Saffron Gym
Fuchsia Gym
Cinnabar Gym
Viridian Gym
Orange Archipelago
Mikan Gym
Navel Gym
Trovita Gym
Kumquat Gym
Johto
Violet Gym
Azalea Gym
Goldenrod Gym
Ecruteak Gym
Cianwood Gym
Olivine Gym
Mahogany Gym
Blackthorn Gym
Hoenn
Rustboro Gym
Dewford Gym
Mauville Gym
Lavaridge Gym
Petalburg Gym
Fortree Gym
Mossdeep Gym
Sootopolis Gym
Sinnoh
Oreburgh Gym
Eterna Gym
Veilstone Gym
Pastoria Gym
Hearthome Gym
Canalave Gym
Snowpoint Gym
Sunyshore Gym
So we need people to become gym leaders. All gym spots are open, and It will be relativly easy to apply for a gym leader position. Make a Post here.
TO CHALLENGE: If you wish to challenge a gym leader, make a post here.
Things to remember before starting a battle forum,
-You must have a ref.
-The players battle must be approved.
-Teams, and characters must be approved.
-Make sure you have some exprience in PRPG before taking the challenge.