Instructions
Recover the Machine Part
Travel to Cerulean City and enter the Cerulean Gym. A Rocket Grunt will run from the building, carrying a stolen Machine Part.
Follow the Rocket Grunt to Nugget Bridge and defeat him in battle. He'll run away, claiming to have hidden the Machine Part somewhere else.
Travel to Route 25 and locate Misty, the Cerulean City Gym Leader, and her boyfriend. After her boyfriend runs off, Misty will return to the Gym.
Travel back to Cerulean City and challenge Misty at the Cerulean Gym. Defeat Misty to earn the Cascade Badge.
Search the inner tubes in the Cerulean Gym until you discover the Machine Part.
Earn the Radio Card
Return the Machine Part to the Power Plant, which is south of the Rock Tunnel on Route 10. The Power Plant can now restore electricity to the area.
Travel to Lavender Town and enter the Radio Tower.
Talk to the man on the first floor. To reward you for restoring the power, he will give you give you an EXPN Card, which allows you to access Kanto radio stations on your PokeGear.
Awaken and Capture Snorlax
Travel to Route 11.
Open the new Radio Card on your PokeGear and access the "Poke Flute" channel. Engage Snorlax. The music will awaken it.
Use strong attacks to lower Snorlax's health bar.
Use moves such as "Thunderwave" and "Sleep Power" on Snorlax to inflict status impairments such as Paralysis or Sleep.
Throw Heavy Balls and Ultra Balls until you capture Snorlax. Then, proceed along the route.