Bailey is the Gym Leader of Greenpine City's Gym, known officially as the Greenpine Gym. He specializes in Grass-type Pokémon. He gives the Nature Badge to trainers who defeat him.
Before the player challenges Highpoint's Gym they wil see a Gorillza running out of the gym then Bailey will appear for the first time standing in front of his Greenpine's Gym asking the player to catch it for him giving them "Bailey's Pokeball" the player must obtain HM05-Stregnth after winning at Highpoint's Gym to enter the Goopool Swamp and capture his Gorillza and return it to him.
After this, He appears as the leader of Greenpine City's Gym. This gym is the sixth to be challenged by the player. Trainers who defeat Bailey will receive the Nature Badge, along with TM???