Cerulean Gym

Cerulean Gym is an officially recognized Pokémon Gym Saloon in Cerulean City. The leader of the gym is Misty, who is specialized in Water-type Pokémon. It is introduced for the first time in when  challenges the gym leader to an official gym battle.

Part Red & Blue
In, the Cerulean Gym is first time visited by Redwald and his friends, as Redwald is ready to challenge Misty to a Pokémon battle. The rules of the gym for a trainer who has one badge, as stated by the officially recognized referee Tiffany, are that the Pokémon battle would be three on three, and only the challenger would be able to substitute their Pokémon. Once the three Pokémon of one side is unable to battle, the battle is over. Redwald defeats Misty at first try.