Later, it was discovered that Psyduck had a permanent headache. Not wanting the continuously ailing Pokémon, Brock ended up passing it off to Misty because she is a Water-type specialist. Misty tried to avoid the little thing, but she ended up capturing it by accident when she dropped a Poké Ball that subsequently rolled towards Psyduck. Psyduck tapped the Ball's control with its bill twice and essentially caught itself.
Out of all of Misty's early Pokémon, Psyduck is arguably the one with the most personality. It was heavily featured, and appears in many episodes, although its appearances started to grow sparse during the Johto saga.
Psyduck does not like to stay in its Poké Ball, and will usually pop out according to its mood. This personality trait has come in handy quite a bit - when Misty or her other Pokémon are captured, it is usually Psyduck who escapes and runs to get help. However, it also tends to frustrate Misty, as it results in Psyduck sometimes emerging for a battle when Misty would prefer to use another Pokémon (although in these cases Psyduck generally manages to win thanks to its Psychic attacks).
When film producer Cleavon Schpielbunk wanted to cast a movie with only Pokémon in Lights, Camera, Quack-tion, Psyduck ended up becoming the costar to Schpielbunk's Wigglytuff, since it was the only Pokémon willing to put up with Wigglytuff's attitude due to its own stupidity. Despite this, Psyduck apparently impressed Wigglytuff with its Psychic abilities after it saved the other Pokémon in the film from being captured by Team Rocket.
In Bye Bye Psyduck, Misty's Psyduck seemed to have gotten separated from the group. Later on, a girl named Marina arrived with a lost Psyduck. Misty assumed it was hers and noticed that its tail was glowing bright pink, which Marina pointed out that Psyduck would evolve soon. Misty and Marina had a battle, during which Ash tossed Misty her bag. It landed in the water, and when Misty retrieved it, she found a Golduck. Thinking her Psyduck evolved, she battled with Golduck, winning the match against Marina. Even when Team Rocket barged in to steal Marina's Pokémon, Golduck easily rescued them. However, when Misty attempted to recall Golduck, her Psyduck popped out instead, revealing that the Golduck was a wild one and that her Psyduck never even left the Poké Ball.
Misty cleverly used Psyduck in battle in The Stun Spore Detour. As Meowth was about to attack, she recalled Staryu and sent out Psyduck. Meowth angrily bit Psyduck's head, which caused Psyduck to have a severe headache, allowing it to use its psychic powers and defeat him.
In The Fire-ing Squad!, Psyduck was entered into the Fire and Rescue Grand Prix with Ash, alongside his Pikachu and Squirtle, as well as Staryu. The group competed against a team of Muk to see who can put out a fire the fastest. Squirtle and Staryu used duel Water Guns on the fire while Pikachu kicked dirt at it. Things were going well until Psyduck got in the way and ended up getting thrown into the fire. Squirtle rescued it, but the loss in time cost them the match.
In The Perfect Match!, Misty was going to use Corsola to battle against Ash and his Kingler in the Whirl Cup, but Psyduck popped out of its Poké Ball instead. Kingler used its Vice Grip on Psyduck, which caused it to get a headache. Misty then had Psyduck use Confusion, which sent Kingler flying and knocked it out, making Misty the winner.
In Just Add Water, Misty was having a battle with Dorian, the Gym Leader of the unofficial Coastline Gym. Psyduck watched Misty battle him until Team Rocket showed up and captured Misty and Dorian. Psyduck became angry and determined, unlike the usual attitude it displayed, and wanted to battle Team Rocket. Arbok used Bite on Psyduck which caused it to get a headache, allowing it to use its Confusion attack. Psyduck then learned Psychic and used it to blast Team Rocket off. Afterwards Dorian was amazed by Psyduck's power and complimented on it, saying Misty easily would have won the battle if she had used Psyduck. Psyduck, however, only seemed confused by the compliment.
Psyduck appeared in Cerulean Blues when it accidentally came out of its Poké Ball alongside Politoed, who was sent out to calm down a rampaging Gyarados. Upon coming out Psyduck falls into the pool and starts to drown. Before it drowns though Gyarados headbutts it out.
In The Blue Badge of Courage, Misty and Tracey tried to teach Psyduck how to swim. Their efforts proved to be unsuccessful as Psyduck freaks out whenever it touches the water, and they stopped when Sakura appeared. It later attempted to battle Kinso's Feraligatr, but was scared off immediately. Soon after, Misty and Tracey resumed their attempts at teaching Psyduck to swim, but the two were interrupted when Kinso informed Misty that thieves stole all of the Badges. Psyduck eventually battled and defeated the thieves' Pokémon alongside Sakura's Espeon, doing so when it got a headache mid-battle and activated its Psychic powers.
Psyduck reappeared in When Regions Collide!, where it greeted Misty upon her return to the Gym. It was later used in a battle against Lana's Popplio and Mallow's Steenee. Steenee started the battle with Magical Leaf while Popplio quickly followed with Bubble Beam. Psyduck then showed its improved battling abilities, firing a now-mastered Water Gun. Popplio, however, created a balloon to absorb the attack, then launched the water-filled balloon at Psyduck, trapping it inside. Misty commanded Psyduck to use Confusion, but it didn't respond. Steenee then attacked with another Magical Leaf, breaking the balloon and causing Psyduck to land on its head, giving it a headache. This allowed Psyduck to successfully use Confusion, but before it could do anything more to its opponents, Misty told Psyduck to put Popplio and Steenee down, saying that they had had enough.
Psyduck reappeared in Alola, Alola!, where it accompanied Misty to Alola. It let itself out of its Poké Ball while at Anela's stand and ended up swallowing a whole watermelon.
Misty's Psyduck can easily be described as dimwitted and absent-minded. When it pops out of its Poké Ball, it often doesn't know how it got there. It is perpetually confused, and even when it summons powerful moves, it appears confused about how it pulled such a feat off. Its motivation for jumping out of its Poké Ball remains unknown, as it clearly does not enjoy or excel at battling. Even in the episode Just Add Water, it pushed Ash aside, wild with anger at Team Rocket's abduction of Misty (she had been captured saving him) and insisting on battling. However, after a few seconds, it completely forgot what it was doing and went back to looking confused.
Misty yelling at Psyduck
Psyduck cannot swim, which is unusual for its species. In deep water, it will panic and flail about, like a non-swimmer afraid of drowning. On one occasion, it was given a lifebelt for it to enjoy the water. It also has trouble in battle. It knows several powerful Psychic-type techniques, but can only use them when its headache is severe. When Psyduck battled Tyra's Cloyster in The Bridge Bike Gang, Misty considered trying to boost its power by slamming a bike onto its head.
Psyduck seems to truly love and care for Misty. Despite its faults, it always tries to be there for her, whether she likes it or not. Misty constantly complains about Psyduck's faults and how its dopey look gives her a headache, but many suspect that she actually deeply cares for Psyduck - she has never considered releasing it (though she tried trading it for Brock's Vulpix in The Ninja Poké-Showdown), though it has been suggested several times; she instantly shoots down such ideas, such as when Koga and Aya both offered a trade with her. Her antagonistic relationship with it is often compared to her relationship with Ash. It could also be compared with Jessie's relationship with her Wobbuffet. James once stated that Wobbuffet made Psyduck look good in comparison. Since When Regions Collide!, Misty's relationship with Psyduck has improved, as shown by her enthusiastically greeting Psyduck upon her return to the Gym.
For comic purposes, Misty seems to go to the limit of violence with Psyduck, such as when she suggested she smash a bike on Psyduck's head in order to activate its psychic powers. Psyduck is quite unconcerned to these threats of violence, perhaps because it knows how Misty truly feels. As shown in Alola, Alola!, it also has a big appetite, which was shown when it swallowed a whole watermelon, and also when it ate the food that Brock had cooked for himself, Misty, and Ash. This was seen again in the next episode, where it wanted some of Misty's ice cream. Misty offered it some of the ice cream, only for Psyduck to eat the whole ice cream cone.
Psyduck was featured in the TCG as one of Misty's Pokémon. The following is a list of cards named Misty's Psyduck.
Misty's Psyduck Cards listed with a blue background are only legal to use in the current Expanded format. Cards listed with a silver background are legal to use in both the current Standard and Expanded formats.