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The wielder takes 25% more damage from Fire-type attacks than it ordinarily would, but gains 25% of its maximum HP if hit by a Water-type attack. If rain is the prevailing weather condition, the wielder gains 1/8 of its maximum HP at the end of each turn; if sun is, then it loses 12.5% of its health instead.
Dry Skin is a great ability in an environment where Drizzle is usable. Despite the limited distribution of Dry Skin, Pokemon can easily use the 12.5% health regain to their advantage. Toxicroak is the most notable user of this ability, as it can easily use Substitute and set up Swords Dance to sweep, as well as bringing to a halt many common Water-type sweepers.
Found in Dream World