While Ash and his friends are on their way to Viridian City, Misty's Horsea looks ill as it swims in a fountain. Brock suggests that it needs to find a bigger pool to swim in, and so, the gang decides to head for Misty's home town, Cerulean City. When they get there, they discover that Misty's sisters at the Cerulean Gym are having trouble attracting crowds to their performances and have advertised Misty to be in a new performance called the Underwater Ballet. Misty is reluctant to be a part of this at first and shocked to learn that the first performance is tomorrow. She finally agrees after a lot of begging from her sisters alongside Ash and Brock's encouragement. They then celebrate after convincing their little sister to do what they want, much to Misty's frustration.
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