Instructions
Enter the Viridian City gym and walk up to the center area of the gym, where three trainers are lined up along the walls.
Go up and to the right to leave the center area. Go up and to the left, and then defeat the trainer who spots and challenges you.
Walk to the left, and then walk up, towards the black belt. When the black belt spots you, he will rush up to you and challenge you to a battle. Defeat him to continue through the gym.
Walk back to the gym entrance, and then walk all the way to the right wall.
Walk up and step onto the arrow tile. When you stop moving, take one step up to step onto another arrow tile. When you stop moving again, walk to your left, and then follow the path to Giovanni.