|Roggenrola||Lv. 16 ~ 18||34%|
|Woobat||/||Lv. 16 ~ 18||31%|
|Timburr||Lv. 17 ~ 18||20%|
|Shaking Grass / Swirling Dust||Level(s)||Rarity|
|Drilbur||Lv. 16 ~ 19||80%|
There are a few directions you can go in here, so start off by heading over to the right, then up and around so you can walk down the steps. Have your Dowsing MCHN on and you can find a hidden Escape Rope due south, while there is a Researcher to the north who uses a Venipede L17 and a Koffing L17. Just past her is a Hard Stone, which is a held item that boosts the power of the Pokemon's Rock-type attacks by 20%. Now go back to the start and head north, west, and north so you're against the cliff. There's an Escape Rope up there, although this one is not hidden. Just south of there, or to the west of the start, there's a Scientist who uses a Grimer L18. Past him is a Backpacker with a Herdier L18, so be careful, because it can hit surprisingly hard (and likes to use Work Up).
Unfortunately, that just leads to a dead-end, so that's all there is to do here for now; you get access to the places up on the ledge later on in the game.