Ash and friends finally arrive back in Hearthome City so that Ash can have his rematch with Hearthome City Gym Leader Fantina. On the way to the gym a trainer runs into him. He quickly runs off, leaving his badge case on the ground. As he can't have his battle with Fantina just yet, he tries to find the owner. In the park he again runs into Barry, the trainer the case belongs too. Barry reveals that he knows about Ash from the Tag Team Tournament. He then starts talking about how he idolizes Paul and wants his pokémon to be just like Paul's. Ash is upset with this, and challenges him to a battle. However, first Barry must go get his pokémon from a pokémon stand where some people watch your pokémon. However, it turns out to be just a scam by Team Rocket. After that is taken care of, Ash and Barry begin their battle.
A young boy named Ash Ketchum embarks on a journey to become a "Pokemon Master" with his first Pokemon, Pikachu. Joining him on his travels are Brock, a girl-obsessed Rock Pokemon Trainer, and Misty, a tomboyish Water Pokemon Trainer who may have a crush on him. Ash and Co. end up traveling through various regions, including Kanto, the Orange Islands, and Johto, and then enter the Pokemon League competitions there.
Along the way, they run into many confrontations with Jessie, James, and Meowth, a trio of Pokemon thieves who are apart of an evil organization called "Team Rocket". But every time Team Rocket try to do their evil deeds, they fail thanks to Ash and his Pokemon.