You can not. The only games that contian the Viridian Forest are:
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It can be found on Route 2, where Viridian Forest used to be, or coin purchase from Celadon Game Corner.
You can get one in Viridian Forest.
talk to a guy in viridian city
Murkrow, you can find it in the... ?viridian forest? (not sure what it's called, but for sure in a forest)
A person can get to Pallet Town in Pokemon Crystal by first defeating Snorlax at the cave. Then, proceed to Viridian City, which leads into Pallet Town.