Wellspring Cave — Pokémon Black & White
Every wild Pokémon here, by encounter method.
Wellspring Cave lists 7 Pokémon across 6 encounter methods (grass, dust cloud, surf, surf (rippling water), and more), between level 5 and 60. One of them is on no other route's wild tables in this guide: Roggenrola.
Wellspring Cave in the official games
The original game's table for this area: