is a Pokémon
ability introduced in the Fourth generation
. It automatically summons a sandstorm
once a Pokémon with this ability enters the battle.
Sand Stream starting an automatic sandstorm. Prior to the fifth generation, this sandstorm lasts until the next weather condition starts. The later generations fixed it so that it only last 5 turns unless the user is holding a Smooth Rock, which extends it by 3 additional turns. When two or more weather abilities users enter a battle, the slower Pokémon will override the others.
If heavy rain, extremely harsh sunlight, or a mysterious air current is present, Sand Stream will fail to activate.
Pokémon with Sand Stream