Viridian city is north from pallet town.
He won't be in viridian at first he will be at cinnibar island if you talk to him he will go to the gym in viridian city go to viridian city to battle him.
There is no Viridian Forest in D/P. Viridian forest is a location in the Kanto games only.
The population of Viridian Group is 2,006.
Viridian Group was created in 1998.
Viridian Tower was created in 2006.
Through the Viridian Forest. It says so in game,
In the Kanto region above Viridian City
You can get Pikachu in the Viridian forest south of Viridian City.
go through viridian forest
On Route 2 there is a building if you go inside it you will arrive in Viridian Forest.
You can not. The only games that contian the Viridian Forest are:GoldSilverHeartgoldSoulsilver
Just north of Viridian City in Kanto