Mt. Silver (4F) — Pokémon SoothingSilver
Every wild Pokémon here, by encounter method.
Mt. Silver (4F) lists 13 Pokémon across 5 encounter methods (grass (morning/day), grass (night), swarm, hoenn sound, and more), between level 30 and 58.
Opens up at 16 badges — Earth (Blue, Viridian).