From Bulbapedia, the community-driven Pokémon encyclopedia.
Route 1 is a short path that runs from Pallet Town to Viridian City in Kanto.
There are no opponent trainers on this route. A man who works at the Poké Mart in Viridian City will give out a free sample of Potion.
Travel south is made easier by leaping down off the ledges and down towards Pallet. Travelers can completely avoid the grassy areas by doing this.
Pokémon that Appear on Route 1