Dark Cave (Main Room) Enc. Rate: 10
Wild Pokemon		Type(s)	Level(s)	Morn.	Day	Night
	Geodude	/	Lv. 2 ~ 4 EXP: 20 ~ 41	60%	60%	60%
	Zubat	/	Lv. 2 ~ 4 EXP: 15 ~ 30	39%	39%	39%
	Dunsparce		Lv. 4 EXP: 71	1%	1%	1%

Items at Dark Cave
	Potion Hug the west side of the cave until you hit the wall at the top, then head east, then jump down a ledge and it's around there.

Again, nothing really of importance in here, unless you really want that freebie Potion or a Zubat.

You can come back here after beating the Sprout Tower and teaching TM70 (Flash) to one of your Pokemon. Use Flash to light up the cave.

Better yet, though, if you want that elusive Dunsparce, you can come back after beating Falkner and getting HM06 (Rock Smash) to the west of the city, then use Rock Smash to break the rocks inside the cave. There's a much better chance of running into Dunsparce that way!