While they are on there way to the Battle Pyramid, Ash and the gang decide to stop at the Pewter Gym and see Brocks Family. When they finally arrive to there suprise, the Pewter City Gym has been made over with a different scenery before. As even more of a shock Brock learns that his Onix has evolved into a Steelix!
After that a Delibird, actually thinking that Jessie and James were Butch and Cassidy, gives Jessie and James a Charizard and Aggron. And now they are trying to take over the gym!
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.