Red & Blue Route 21
The watery crossing between Cinnabar Island and Pallet Town, half tall grass and half open sea full of Tentacool and Swimmers.
Route 21 is in Kanto, with Pallet Town to the north and Cinnabar Island to the south. In the story it comes after Pokémon Mansion and before Cinnabar Gym.
ROUTE 21 MAP
Half tall grass and half open sea, this crossing from Cinnabar to Pallet has you walk the north strip, then Surf the southern stretch home.
Pokemon Encounters
Tangela hides in the grass at 10%, and this crossing between Cinnabar and Pallet is the only easy place to find one. Pidgeotto and Raticate share the land while Tentacool blankets the surf.
Magikarp
Also found in 25 other locations
TRAINERS
Swimmers and Fishermen drift between Pallet and Cinnabar, their Water-types dominating up to level 37.

Fisherman
Route 21 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.



