Boosts the Pokémon's evasiveness by 25% in a sandstorm.
Sand Veil (Japanese: すながくれHidden in Sand) is an Ability introduced in Generation III.
Effect
In battle
During a sandstorm, the accuracy of any move used against a Pokémon with this Ability is modified by a factor of 4/5 (approximated as a factor of 3277/4096 since Generation V). A Pokémon with this Ability will take no damage from the sandstorm if it otherwise would.
Outside of battle
From Pokémon Emerald onwards, if a Pokémon with Sand Veil is in the first place in the party (even if fainted) in an area with a sandstorm (such as Route 228 in Sinnoh), the chance of encountering a wild Pokémon is decreased by 50%.