Red & Blue Route 20
Swimmers and rock formations dot the sea lane from Fuchsia City out to the Seafoam Islands, thick with drifting Tentacool.
Route 20 is in Kanto, with Cinnabar Island to the west. In the story you arrive from Route 19 to the east and continue through its entrance to Seafoam Islands.
ROUTE 20 MAP
Surf carries you the whole way along the sea lane between Cinnabar Island and the Seafoam Islands, threading past the rock outcrops that break up the channel.
Pokemon Encounters
The sea lane out to the Seafoam Islands is wall-to-wall Tentacool on the surface. The Super Rod adds the only variety down here, Horsea and Shellder beside the odd Staryu at level 15.
Magikarp
Also found in 25 other locations
TRAINERS
Swimmers' Water-types and a few Flying threats fill the channel between Fuchsia and the Seafoam Islands, reaching level 35.

Beauty
Route 20 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.




