Sand Veil is an ability in which the user's evasion increases if a Sandstorm is present. If the user is not a Rock, Steel, or Ground-type, then the user will not be harmed by the effects of a Sandstorm. It also makes it 50% less probable that you will encounter wild Pokémon in areas where a Sandstorm occurs, if the Pokémon with this ability is in the lead spot.

Pokemon

Pokédex	Pokémon	Sprite	Type	Obtained
#027	Sandshrew			Natural
#028	Sandslash			Natural
#050	Diglett			Natural
#051	Dugtrio			Natural
#074	Geodude			Dream World
#075	Graveler			Dream World
#076	Golem			Dream World
#207	Gligar			Natural
#231	Phanpy			Dream World
#232	Donphan			Dream World
#246	Larvitar			Dream World
#331	Cacnea			Natural
#332	Cacturne			Natural
#443	Gible			Natural
#444	Gabite			Natural
#445	Garchomp			Natural
#472	Gliscor			Natural
#618	Stunfisk			Dream World