Ability₂₀₃-Rough Skin

🟢Gen³
When a Pokémon with this Ability is hit by an attack that makes contact, the attacking Pokémon takes damage equal to ¹⁄₁₆ of its max HP.

⚠️If a Pokémon with this Ability is hit by a multi-strike attack that makes contact (such as Fury Swipes), each hit will activate this Ability.
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🟣Gen⁴⁺
When a Pokémon with this Ability is hit by an attack that makes contact, the attacking Pokémon now takes damage equal to ⅛ of its max HP.
~Bulbapedia