Red & Blue Route 22
Just west of Viridian City, where your rival ambushes you early and the road later climbs toward Victory Road.
Route 22 is in Kanto, with Viridian City to the east. In the story it comes after Viridian Gym and continues north to Route 23.
ROUTE 22 MAP
Pokemon Encounters
Both Nidoran appear early on this road, the male and female you need to build toward Nidoking and Nidoqueen. Spearow and Rattata crowd the rest of the grass between level 2 and 5.
Magikarp
Also found in 25 other locations
TRAINERS
Your Rival waits at the Viridian gate twice, first as a low-level scrap before the first gym and again as a punishing rematch after the eighth badge. Match his team to your starter choice.

Blue
Route 22 Guide
Yes. Each version locks away a handful of route species. Ekans, Oddish, Mankey, and Growlithe stay in Red, while Sandshrew, Bellsprout, Meowth, and Vulpix belong to Blue, with Scyther and Pinsir split the same way. Trading with the other version is the only way to fill those gaps.
Three rods, three givers. A fisherman in Vermilion City hands over the Old Rod, which only ever hooks Magikarp. The Good Rod comes from a fishing fan in Fuchsia City and adds Poliwag, Goldeen, and other common catches. The Super Rod, waiting on Route 12, reaches the rod-only rarities listed here.

