Leaf becomes the champion of the Pokémon League after beating Blue, and nothing is heard about her until some time after. After being defeated once again, Giovanni decides to leave Team Rocket and the group apparently splits forever.
Leaf later finds Giovanni, the leader of Team Rocket she'd faced twice, is the last gym leader she must face before continuing her way. The main conflict Leaf must face is Team Rocket, a group of criminals who want to steal Pokémon and related objects to cause trouble. While Leaf advances through Kanto, collecting Pokémon and defeating Gym Leaders to compete in the Pokémon League against the Elite Four, her rival Blue seems to be always one step ahead. Moments later, the professor gives both a PokéDex, and gives them the mission to complete it with all species of Pokémon, which had been Oak's dream from long ago. One day, Professor Oak calls both and gives them the choice of selecting one of three starter Pokémon. After her friend, Blue stopped playing with her, Leaf, being 10-years-old, started to be interested in Pokémon.