Swablu is an avian Pokémon with a round, blue body. Since it has no discernible neck, its body appears to be all head. There are two long feathers on top of its head, and it has a short, rounded white beak and beady, black eyes. Its wings are fluffy and white, resembling cotton or clouds and are made of air. The wings have a light and fluffy feel. It has tiny, white feet and two pointed tail feathers.
Swablu does not like dirty surroundings, so it cleans things with its cottony wings diligently. It uses streams and freshwater springs to wash its wings when they become dirty from polishing. It is commonly found living in flocks in forested habitats, but often flies closer to towns during the spring. Swablu is very friendly and largely unafraid of humans. As a result, it frequently perches on people's heads like a fluffy hat. Swablu can easily hide from foes in clouds thanks to its appearance.
Multiple Swablu made their main series debut in True Blue Swablu, where they played a major role. One of them got separated from its flock when the tree its flock was nesting in was struck by lightning. May helped take care of Swablu, who had injured its wing, but the Pokémon was suddenly afraid to fly. After the wing was healed, it took Ash and his friends some time to help Swablu get the courage to fly again. At the end of the episode, May offered Swablu a place on her team but ultimately chose to let it go when its flock returned.
In That's Just Swellow, Shane's Swablu participated in the Crossgate PokéRinger competition, where it was able to get Shane past the first round. However, it eventually lost to James and Dustox in the semifinals.
In the Hoopa's Surprise Ring Adventures short Flying in the Air, Hoopa summoned multiple Swablu to create wind for Ash and Pikachu, but their combined Gust was too much for them and sent them blasting off.
Multiple Swablu debuted in Jirachi: Wish Maker as some of the residents of Forina, Jirachi's home.
In A Double Dilemma, a Swablu was living at North Petalburg.
Multiple Swablu appeared in Destiny Deoxys.
In Who's Flying Now?, a Swablu was featured in the Fortree City Feather Festival.
A Swablu appeared in PK13.
A Swablu appeared in Pokéblock, Stock, and Berry.
In Clamperl of Wisdom, a Swablu was living at Maisie Island.
A Coordinator's Swablu appeared in Mean With Envy.
In Lucario and the Mystery of Mew, multiple Swablu were living in the Tree of Beginning.
Multiple Swablu appeared in Pokémon Ranger - Deoxys' Crisis! (Part 1).
In a flashback in Pokémon Ranger and the Temple of the Sea, multiple Swablu helped Pokémon Ranger Jack Walker when he was a young boy lost in a blizzard.
In A Staravia Is Born!, Team Rocket captured multiple Swablu.
Multiple Swablu appeared in Giratina and the Sky Warrior.
A Swablu appeared in Pokémon Ranger and the Kidnapped Riolu! (Part 1). Two additional Swablu appeared in the follow-up episode.
In Pursuing a Lofty Goal!, a Trainer's Swablu participated in the Squallville PokéRinger competition. It was used against Ash and Staravia, but it was defeated.
Two Swablu appeared in The Lonely Snover!.
In Coming Full-Festival Circle!, a Swablu listened to Nando as he played his music.
In Butterfree and Me!, multiple Swablu were living at Wayfarer Island.
A Swablu appeared in BWS01.
A Swablu appeared in Kalos, Where Dreams and Adventures Begin!.
A Swablu appeared in Grooming Furfrou!.
In Summer of Discovery!, Foggy Pokémon Orienteering!, and Battling Into the Hall of Fame!, a Trainer's Swablu attended the Pokémon Summer Camp.
A Trainer's Swablu appeared in Confronting the Darkness!.
A Swablu appeared in A Fashionable Battle!.
A Trainer's Swablu appeared in A Performance Pop Quiz!.
A Trainer's Swablu appeared in Valuable Experience for All!.
In JN095, a Swablu caused Team Rocket to blast off twice.
||Swablu, the Cotton Bird Pokémon. Swablu loves cleanliness and is quick to wipe off any unclean surface with its cotton-like wings.
In The Cavern, two wild Swablu were flying away from a storm that a Primal Kyogre was creating.