During harsh sunlight, a Pokémon with Dry Skin will lose ⅛ of its maximum HP at the end of each turn. During rain, a Pokémon with Dry Skin will regain ⅛ of its maximum HP at the end of each turn.
Fire-type attacks do 25% more damage to a Pokémon with Dry Skin.
When a Pokémon with Dry Skin is hit by a Water-type move, its HP is restored by one quarter of its maximum HP, and the move will have no effect on that Pokémon (if a Pokémon with this Ability already has full HP, the Water-type move will do nothing). This effect will not activate if the Pokémon is protected from the Water-type move. Multi-strike moves, such as Water Shuriken, will only activate this effect once.
If a Pokémon with Dry Skin is holding an Absorb Bulb or Luminous Moss, Dry Skin absorbs the Water-type move so the item's effect is not triggered.
Outside of battle
Dry Skin has no effect outside of battle.
In Explorers of Time, Darkness and Sky, Pokémon with Dry Skin lose 3 HP every 9-10 turns in Sunny weather and take 50% more damage from Fire-type moves. Water-type moves heal equal to the damage that would be dealt. In the rain, the natural HP recovery rate is quadrupled from 0.5% of the maximum HP per turn, to 2% per turn.
In Pokémon Super Mystery Dungeon, Dry Skin now prevents natural HP recovery. The Pokémon now lose 1 HP every 10 turns in Sunny weather, and Fire-type moves do 1.2x damage to the Pokémon. When hit by a Water-type move, the Pokémon gains 20 HP. The natural HP recovery rate is now doubled in the rain, from 0.5% per turn to 1% per turn.
||Weakens Pokémon in sun and to Fire-type moves; rain and Water-type moves heal HP.
||ひざしがつよいや ほのおタイプわざによわく あめや みずタイプわざで かいふく
||Water-type moves and Rain restore its HP. Fire-type moves and Sunny weather damage it.*|
If it is hit with a Water-type move or the weather condition is Rain, the Pokémon's HP is restored! But if the weather condition is Sunny, it will gradually take damage. Fire-type moves do more damage!*
||If it is hit with a Water-type move, the Pokémon's HP is restored! Rain or heavy rain helps the Pokémon restore HP naturally. But the Pokémon doesn't do well when it's sunny or in harsh sunlight.
||The Pokémon absorbs Water-type moves to restore its HP. Rain or Heavy Rain helps the Pokémon restore HP naturally more quickly. But the Pokémon doesn't do well when it's Sunny or in Extremely Harsh Sunlight, and it also doesn't do well against Fire-type moves.