From Bulbapedia, the community-driven Pokémon encyclopedia.
These are Abilities that affect what kinds of Pokémon appear under certain conditions; for example, from Pokémon Emerald onward, Sand Veil halves the probability of encountering wild Pokémon while in a sandstorm if the Pokémon with it is in the first place in the party. These Abilities' effects activate only if the Pokémon with the Ability is leading the party.
This category has only the following subcategory.
Pages in category "Abilities that affect appearance of wild Pokémon"
The following 20 pages are in this category, out of 20 total.