As far as I remember there is a tunnel or something to Celadon city in Lavender town.
its at the top of cealdon city xox
At the top of one of the towers in Cealdon City
You'll need to make it to Cealdon City first and buy a drink from the vending machines in the department store. Head east out of the city and give the guard the drink and he will let you into Saffron.
Cealdon City
in pokemon yellow, the casino is in celadon city. it is at the far left of the buildings in the middle of the city. L
it is in saffron city
Celadon City
Pokemon mart in Celadon City
Not to be mean but you have to be joking me! VIDIRIAN CITY!
buy it in celdon city
Cerulean city
Vermilion city