Laurel Gym, located in Laurel City, is the third gym the player challenges in the Naljo region. Its gym leader is Brooklyn, who specializes in Fairy-type Pokémon (Water-type, in earlier versions of the game).
The gym cannot be challenged until the player has rescued Brooklyn's Totodile from Laurel Forest.
Defeating Brooklyn awards the Charm Badge, which allows the use of HM04 (Strength) outside of battle. She will also give the player TM45 (Attract).
After defeating Brooklyn and leaving the gym, her Totodile will run out after the player and join their party.