In soul silver , to use the pokeflute, you have to be in kanto region. After you fix the power plant in kanto, you can use the radio in your pokegear, and drag the searcher dot up to the top and the pokeflute will play.
use the little circle and go to the top of the radio then you will here the poke flute
play the poke flute
you can't get the poke flute on soul silver however you can get it on the poke radio to wake the sleeping snorlax blocking entrance to diglets cave.
you'll need the poke flute
In your radio, all you do is go to the top of your radio with the little dot and then it will say poke flute and then you can get that awsome snorlax that is blocking diglets cave. (but the poke-flute channel only works in Kanto not in Jhoto)
you tune on to the poke flute chanel on the radio in your poke gear then go to the snorlax and pres a
To get the pokeflute in Heartgold and Soulsilver, you must go in the Kanto region and must be able to use the radio in the Pokegear in Kanto and when you use the radio, put it all the way on top.
Go up to it. Turn on your radio to the poke flute and then press A
Poke flute channel
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move the tuning dot to the top of the circle anywhere in kanto
you have to get the poke flute poke gear radio station and play it next to snorelax