wake up the snorlax at vermillion city, diglets cave and go through diglets cave. you should end up near pewter city so go down from that. PS to wake up snorlax you need pokegear upgrade and go to top of the round channel thingy and it should say poke Flute then just talk to snorlax and it will wake up. it is level 50
Viridian City is in the Kanto region. You'll be able to get there by going through Diglett's cave after waking the sleeping Snorlax.
Pewter City
Near the virdian forest entrance on Thursday.
go north to the viridian forest and that will get you out.
nowhere
You can get Pollywhirl in Pokemon Leaf Green in Virdian City.
Virdian forest
Virdian Forest.
Its to the LEFT of Virdian City
in the johto region its in blackthorn city and in the kanto region its in virdian cityblackthorn cityBlackthorn City, past the Ice Cave.
Go to the Pokemon League, West of Virdian City
in the ilex forest and later in the virdian forest