|Shaking Grass / Swirling Dust||Level(s)||Rarity|
|Ducklett||/||Lv. 23 ~ 26||100%|
As soon as you enter the route, talk to the first guy you see and he'll give you a Funfest Mission Flutter Feather Drawbridge (translation). Cool, I guess.
You can run around on the drawbridge and find shadows, with rustled feather sounds along with them. If you run over that shadowy patch, you'll find either one of several feather items (which raise your Pokemon's stats ever so slightly, except for one feather, which does nothing), or you'll run into a Ducklett.
You can sell these feathers for $1000 a piece in a shop, making them another good way to earn money.
Anyway, keep heading west until you reach Driftveil City!