Altering Cave — Poke47
Every wild Pokémon here, by encounter method.
Altering Cave lists 2 Pokémon across 1 encounter method (overworld), between level 6 and 16. Between them they cover 3 types: FlyingDragonPsychic.
Altering Cave in other guides
The same area in other ROM hacks on this site. Each one has its own encounter table.
Elite ReduxInclement EmeraldPokemon Modern EmeraldPokémon Aesthetic RedPokémon Black Pearl EmeraldPokémon Emerald BlitzPokémon Emerald ImperiumPokémon Emerald KaizoPokémon Emerald Rule-ettePokémon Emerald SeaglassPokémon Emerald SquaredPokémon FireRed & LeafGreen+Pokémon FireRed Reignited & LeafGreen RegrownPokémon Hoenn's Last WishPokémon Phoenix RedPokémon R.O.W.EPokémon ValiantPokémon WaveBlue
The original game's table for this area:
Opens up at Roxanne, the Stone Badge — level cap 17.
Overworld Lv 6-16
These Pokémon walk around the map where you can see them, and the same table is what the grass and Sweet Scent pull from when a battle starts the ordinary way.