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Psylu is usually found in ponds swimming at the surface of the water, its fluffy wings becoming drenched as it swims around. Fields on the flight path between ponds are well-watered when Psylu travels, its wings raining water down.

Psylu soars above coastal towns, sensing storms before they form. When one nears, it releases psychic waves that cause headaches in nearby humans.

A Pokémon that has wings like cottony clouds. When its headache intensifies, it starts using strange powers.