Mt. Silver (outside) — Pokémon SoothingSilver
Every wild Pokémon here, by encounter method.
Mt. Silver (outside) lists 18 Pokémon across 12 encounter methods (grass (morning/day), grass (night), surf, old rod, and more), between level 10 and 54.
Mt. Silver (outside) in other guides
The same area in other ROM hacks on this site. Each one has its own encounter table.
Opens up at 16 badges — Earth (Blue, Viridian).