- Voice actor: Michael Haigney (both English and Japanese)
Psyduck resembles a yellow duck or platypus with a vacant stare. It has three small tufts of black hair at the top of its head. It walks on its hind legs, has a stubby tail, and has arms rather than wings, terminating in claws to deliver scratches if threatened. Its arms are useful in using its powerful psychic abilities. Its appearance, according to the Pokédex, is meant to trick enemies into thinking it is weak. Its height is 2'07" and weight is 43.2 lbs.
Psyduck is constantly stunned by its headache. It usually stands immobile, with a vacant expression, trying to calm its headache. However, when its headache becomes too severe, it releases tension in the form of strong psychic powers.
Psyduck are usually unable to think very clearly due to having a chronic headaches. Because of the headache, a Psyduck will always hold its head. When these headaches worsen, Psyduck may use psychic powers.
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Misty has a Psyduck that she accidentally caught in Hypno's Naptime. It is a constant source of frustration for her, as it frequently emerges from its Poké Ball to attempt to battle the opponent in substitution of one of her other Pokémon. Despite this, she has been shown to deeply care for it. Despite being generally shown as dimwitted and oblivious, when its headache gets bad enough, it has been shown to use phenomenally powerful Psychic-type moves which far exceed its normal ability.
Nine Psyduck appeared in The Psyduck Stops Here!; six parents and three babies. Three of the parents were blocking the path that Ash, Sonic and his friends tried to pass on their way to Celestic Town. The Psyduck weren't able to return to their real home, Lake Psyduck, due to three Muk.
Two Psyduck were part of an exhibition in Flower Power.
A Psyduck appeared in Dueling Heroes.
A Psyduck appeared in Win, Lose, or Drew! as a Pokémon in the Contest.
A Psyduck appeared in the opening of Lucario and the Mystery of Mew.
Psyduck, Duck Pokémon. Psyduck constantly suffers from frequent headaches. When Psyduck's headache becomes severe, especially intense, it starts to exhibit and uses odd and mysterious, but amazing powers to perform various attacks.