Fiona

Fiona is the Gym Leader of Serquet City's Gym, known officially as the Serquet Gym. She specializes in mostly Poison-type Pokémon. She gives the Acid Badge to Trainers who defeat her.

In the game
This Gym is the first to be challenged by the player. Trainers who defeat her will be given the, along with TM09 Venoshock. (Personal info needed here)

Gym battle