Major appearances
Three Ducklett debuted in Dancing With the Ducklett Trio!, where they attacked Ash and his friends and stole some of their items, including Ash's hat, and Sandile's sunglasses.
A sunglasses-sporting Ducklett appeared in The Mighty Accelguard to the Rescue!, under the ownership of a nefarious Trainer. At its Trainer's command, it stole food from the Driftveil Market. It was then overtaken by the Mighty Accelguard and his Accelgor, and it and its Trainer were arrested by Officer Jenny.
Multiple Ducklett appeared in There's A New Gym Leader In Town! at a Pokémon School in Aspertia City. They were among the Pokémon scared by the loud intercom.
An Ducklett appeared in The Pirates of Decolore!, where it was the fourth member of Croconaw's gang and was responsible for keeping the raft they traveled on from drifting away. Ducklett later joined Officer Jenny's squad after participating in the Darumaka rescue.
Minor appearances
Multiple Ducklett appeared in White—Victini and Zekrom and Black—Victini and Reshiram.
Multiple Ducklett appeared in The Lonely Deino!, under the care of a Day Care owner named Bobby.
Multiple Ducklett appeared in Stopping the Rage of Legends! Part 1.
A Trainer's Ducklett made a cameo appearance in Climbing the Tower of Success!.
Two Ducklett appeared in flashbacks in Drayden Versus Iris: Past, Present, and Future!.
Multiple Ducklett appeared in a flashback in The Island of Illusions!, including one under the ownership of a Trainer at the Grand Spectrala Islet Pokémon Center.
A Ducklett nicknamed Center appeared in a flashback in Go, Go Gogoat!. It was a resident of an unnamed island in the Decolore Islands.
Ducklett made cameo appearances in A Blustery Santalune Gym Battle!, A Jolting Switcheroo!, Awakening the Sleeping Giant!, A Pokévision of Things to Come!, Heroes - Friends and Faux Alike!, and A Fashionable Battle!.
Multiple Ducklett appeared in Diancie and the Cocoon of Destruction.
A Trainer's Ducklett appeared in Performing with Fiery Charm!.
A Trainer's Ducklett appeared in Adventures in Running Errands!.
A Trainer's Ducklett appeared in A Giga Battle with Mega Results!.
A Performer's Ducklett appeared in A Dancing Debut!, where it was used during the Couriway Showcase. It appeared again in Master Class Choices!, where it was seen competing in the Fleurrh Showcase.
Four Ducklett appeared in An Electrifying Rage!
Pokédex entries
- Ducklett shares its category with Pelipper. They are both known as the Water Bird Pokémon.
Origin
Ducklett seems to be based on a duckling or cygnet. Its bottom plumage also resembles a swim ring, while its evolved form has similar plumage that resembles a bikini. Its name suggests that its evolutionary line may also be based on the fairy tale, The Ugly Duckling, in which the "ugly duckling" someday becomes a beautiful swan.
Name origin
Ducklett may be a corruption of ducklet, possibly combined with wet or -ette (suffix meaning small).
Koaruhie may be a combination of 子 ko (child) or 小 ko (small) and a corruption of 家鴨 ahiru (duck).