Pokémon Mansion 2F — Pokémon FireRed & LeafGreen+
Every wild Pokémon here, by encounter method.
Pokémon Mansion 2F lists 8 Pokémon across 2 encounter methods (grass, grass), between level 26 and 36.
Pokémon Mansion 2F in other guides
The same area in other ROM hacks on this site. Each one has its own encounter table.
Opens up at Marsh Badge — the sea routes and Cinnabar Island. 2 trainers here: