Sandstorm (move)

Sandstorm is a -type status move affecting the weather. It is TM37 and is received from a quest in Goldune City.

Effect
When this move is used, a sandstorm will brew. This effect will last for 5 turns. This clears any other weather, but will fail when the weather is already sandstorm. While Sandstorm is in effect, all Pokémon who are neither -, -, nor -type will be damaged ⅛ of their maximum HP at the end of each turn. Pokémon in the semi-invulnerable turn of  will also not take damage from Sandstorm, regardless of type. Also, the moves ,, and  will recover only half as much HP as under clear conditions.

The damage inflicted at the end of each turn is decreased to 1/16 of the Pokémon's maximum HP. Pokémon with the  Ability have the accuracy of any move used against them modified by a factor of 4/5 when Sandstorm is in effect, and are immune to Sandstorm's damaging effect. ,, and  now only restore ¼ of the user's maximum HP. will also prevent damage from Sandstorm during the semi-invulnerable turn.

Additionally,  becomes -type. All Rock-type Pokémon will now have their Special Defense raised by 50% for the duration of the sandstorm. Also, if a Smooth Rock is held when Sandstorm is used, its duration is lengthened from 5 to 8 turns.

Pokémon with the  Ability have their Speed doubled, while Pokémon with  get a power boost of 30% for their -, - and -type moves. Both of these Abilities grant an immunity to Sandstorm's damaging effect.