Under the Celadon City Game Corner is the Team Rocket HQ. Explore the headquarters and you’ll ride on the panels on the floor. Find the lift key and use the elevator to go to the B4F of the hideout. In the B4F, you’ll meet Team Rocket’s boss, Giovanni. The opposing 3 Pokémon are easy to attack with Fighting type moves. After winning, Giovanni will retreat and leave behind a key item, the Silph Scope. With the Silph Scope, you can identify the ghosts in the Pokémon Tower.