When Ash and Brock enter Cerulean City, they see a big crowd of people surrounding a building. Unbeknownst to them, Team Rocket had stolen a vacuum machine from the store overnight. Ash and Brock push through to the front, where they see Officer Jenny, who accuses them of being criminals. When they prove their innocence, she lets them go and ushers the crowd away. After that, they sit on a bench and Ash asks Brock for inside information on the Gym Leader. Brock tells him that as a Gym Leader, he cannot give out that information. Then Brock decides to check something out that he has been meaning to look at. They split up, and Ash heads to the Cerulean Gym alone.
(Source: Bulbapedia)
