Kanto Route 20/Route description

From the southern entrance to the caves underneath Seafoam (guarded by a Trainer in Generations III and IV), Route 20 curves west, passing south of 's western terminus through a narrow channel before expanding to the width of Route 19 west of the Seafoam Islands. In every Generation, there is a small rest platform just west of the Seafoam Islands (though this has become a single, large island in Generations III and IV). This rest area is occupied by a Trainer in Generation I,, and.

Depending on the generation, the layout of Route 20 between this point and Cinnabar varies. In every generation, however, the essence is constant, as the route continues directly west to Cinnabar, where it encircles the island and meets on Cinnabar's north side. 