Swadloon is a round, yellow Pokémon inside of a cloak of leaves. It drapes the leaves over itself and draws them closed around its body, so only a large, crescent slit remains for its face to appear. This leafy cloak keeps the Pokémon warm. Under its cloak are darker green, limp leaves which frame the sides of Swadloon's face and trail down on the sides of its body. The top of the cloak has two semicircular leaves that form a V shape. On its back are the veins of the leaf as well as a bit at the bottom tip of the cloak resembling a rounded tail. Swadloon lives on the forest floor and converts fallen leaves into nourishment, which helps the surrounding plant life grow.
Swadloon, the Leaf-Wrapped Pokémon and the evolved form of Sewaddle. Swadloon's body is covered in leaves which protect it from the cold. In forests where Swadloon live, the trees and grass grow very well.
This concludes the entries from the Best Wishes series.
Swadloon appears to be based on the caterpillar form of the silver-spotted skipper during chrysalis. Silver-spotted skippers fold leaves over themselves for shelter as they age and, when cocooning, eventually use silk to stick the leaves together and form its chrysalis. The appearance of Swadloon hiding in its blanket bears some resemblance to the stereotypical portrayal of people suffering from hikikomori (acute social anxiety disorder) syndrome in Japanese media. Its evolution into Leavanny (whose Japanese name is two kana away from "hikikomori") being caused by friendship may also be a lesson.
Swadloon may be a combination of swaddle (to wrap a baby in cloth) and cocoon.
Kurumayu may be a combination of 包む kurumu (to wrap up) and 繭 mayu (cocoon).