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When a male Swoororus courts a female during winter nights, its membranous fins begin to glow and shimmer like polar lights. One can feel a pleasant chill coming from the heart patterns on this Pokémon's body when it's happy or in love.

Using its diamond-shaped crystals, it can instantly create a wall of ice to block an opponent's attack. Anyone who comes into contact with the ultrasonic waves emitted by a courting male experiences a positive mood shift.