Underground Ruins

Unova

	Black 2	White 2	Black	White
Walking in tall grass or a cave
Onix	5% L57	5% L57
Nosepass	15% L55–57	15% L55–57
Lairon	15% L55–57	15% L55–57
Boldore	35% L54–56	35% L54–56
Woobat	10% L54	10% L54
Durant	20% L54	20% L54
	Black 2	White 2	Black	White
Walking in dust clouds
Onix	20% L54	20% L54
Steelix	5% L57	5% L57
Excadrill	75% L54–57	75% L54–57