It is in the first city you come to in Kanto, Vermillion City. It is sleeping outside the diglett cave just east of the city, it is level 50 BTW.
Chat with our AI personalities
The radio will be your instrument to wake up the sleeping Snorlax. There's a certain radio station that plays the poke flute. When you face Snorlax, tune in to that station and let the Snorlax hear the flute for it to wake up.
After you get the pokeflute you turn it on and go to the sleeping snorlax and it wall wake up you will be able to fight it at level 50
east of vermilion city, just under diglett cave (you need to get rid of it to advance to pewter, veridian, pallet and cinnibar)
Breed a Snorlax
Snorlax is found blocking diglett's cave in vermilion city.