It is the first city in the game just north of Route 1 where that old guy who needs his coffee is and where the guy in the mart askes you to give oak his package.
go through viridian forest
viridian city
viridian city
in Pokemon heartgold, soulsilver, firered, and leafgreen it is north of Viridian city
Try looking on the route west of viridian city.
go through viridian forest
Viridian city.
Viridian city.
Viridian City gym!!
Viridian City.
viridian city
On the upper left of Viridian City.
Beat the eighth Gym, which is in Viridian City!
viridian Forrest befor pewter city
viridian city
it is to the left of viridian city-where you defeat Gary for the first time
(Pewter city) through Viridian Forest