Swadloon is a round, yellow Pokémon inside of a cocoon of leaves, which it drapes around itself and is able to see through a crescent slit in the leaves. Under its "blanket" are darker green limp leaves which trail under its body. The top of the cocoon has two crests connected joined together at the bottom to form a "v" shape and appear to be the Pokémon's antennae. On its back are the veins of the leaf as well as its stumpy tail. Swadloon is almost always seen wearing a glum or bored expression, with a small frown and its eyes looking vaguely grumpy.
Preferring dark, damp places, it spends the entire day eating fallen leaves that lie around it.
|-||Evolves from Sewaddle|
|Ilex Forest||Forest Floor|
|Azalea Gym||LVL 21||Bug Catcher Al|
|Azalea Gym||LVL 21||Bug Catcher Josh|
|Azalea Gym||LVL 22||Gym Leader Bugsy|
|-||Grasswhistle||The user plays a pleasant melody that lulls the target into a deep sleep.||-||55%||15 (max 24)|
|-||Tackle||A full-body charge attack.||35||100%||35 (max 56)|
|-||String Shot||A move that lowers the foe's Speed.||-||95%||40 (max 64)|
|-||Bug Bite||The user bites the foe. If the foe is holding a Berry, the user eats it and gains its effect.||60||100%||20 (max 32)|
|-||Razor Leaf||Cuts the enemy with leaves. High Critical-hit ratio.||55||95%||25 (max 40)|
|20||Protect||It enables the user to evade all attacks. Its chance of failing rises if it is used in succession.||-||-%||10 (max 16)|