Because this is 3 years after Gold, Silver, and Crystal, you can't. Instead, you go to the GoldenRod Radio Tower and go to the 3rd lady behind the counter, closest to the right. Anwser all the questions, and you will get a pokegear radio add on. Now go to Snorlax, then go on your pokegear radio, and look for the station called Poke-Flute. Get off it now and Poke-Flute should still be playing. Then talk to Snorlax.
ask the little children they know you want them
at the kanto radio tower
You can find the Poke Flute in the Pokemon Tower. After you free Mr. Fuji, he will give you the Poke Flute.
there is no pokeflute in heart gold. to wake up snorlax use the pokeflute channel on the radio
to use the flute in heart gold you must have a radio go near a snorelax and use the styalus to find the station that the poke flute is on you can not use it in jahoto though but in kanto you can.
Give them a Bitter berry, play the poke flute,or give them an awakening
Move the dot on the radio to te middle line, and go up until it says Poke Flute.
well you get a poke flute and go to the snolax wake it up and go throe the tunnel and there you are
move the dot to the top, you should find the poke flute channel
save mr.fuji from Pokemon tower top floor and get the poke flute
Poke Flute Just a radio channel that only Kant uses Black Flute Repels wild Pokemon White Flute Attracts wild Pokemon Blue Flute Awakens a sleeping Pokemon Yellow Flute Snaps a Pokemon out of Confusion Red Flute Snaps a Pokemon out of Infatuation
Play poke flute on Radio