After separating from Ash and Brock, Misty returns to Cerulean City to start her duties as gym leader. On the way to the gym she learns that many gyms have been shut down after failing inspections from the PIA. She rushes home in order to make sure it isn’t shut down. However, when she returns a Gyarados is on a rampage disturbing all the water pokémon. To make matters worse, the Invincible Pokémon Brothers have followed her home and challenge her to a match for the gym, and they decide not to play fairly!