Psyduck that live in willow-lined lakes display markedly different behavior due to the natural aspirin leaching into the water. They’re more focused and playful, but lose their psychic powers. Stressful environments produce the opposite effect.

While Golduck are peaceful, their quiet movement can startle rivergoers. The Kappa legend often results in the Golduck receiving a deep, respectful bow. This confuses them, but Golduck near popular watering holes learn to return the gesture.