Belduck are easily overstimulated, so many Trainers give them work in a factory setting to help teach them how to regulate their minds when there are loud noises. The repetitive task of factory work teaches them how to ignore sudden loud noises.
When its headache intensifies, it starts using strange powers. When Belduck gather in a swarm, they move in perfect unison as if they were but one Pokémon.
