Unlike previous Mainstream Pokemon Games, every Pokemon Gym found within this game have certain requirements that must be met before your trainer will be allowed to challenge said Gym. The fourth Pokemon Gym within the Kanto Region is found in Celadon City. This Pokemon Gym is full of female trainers just like in the Anime Series, and because of this, your trainer will be required to have at least one Pokemon deemed as being cute in their Party in order to gain access to the Gym. Luckily, your Starter Pokemon will have you covered, immediately earning you access to challenge this Pokemon Gym.