What Do You Do After You Beat Misty The Gym Leader In Pokemon Heart Gold?

You go to the radio station an talk to the guy with brown clothes hell give you a radio card first go to snorlax at digit's cave and go to radio and at the very top [tip top] you go to poke flute and leave it on and talk to snorlax then he'll battle you if you want to catch him get a lot of pokeballs.Hope this helps really do.