In Gen 7, Water Sport has been buffed to work for 5 turns, instead of lasting until the user switches out. Does the Light Clay item increase the turns that Water Sport is active?
No. Light Clay only affects the moves Light Screen, Reflect, and Aurora Veil.
If the Pokémon holding this item uses Light Screen, Reflect, or Aurora Veil, the effects of those moves last eight turns instead of five turns.
Water Sport only weakens the power of Fire-type moves.
Generation V Water Sport now reduces the base power of Fire-type moves by 67% on both sides in battle.
Generation VI onwards Water Sport is now active for five turns, even if the user switches out.
