48: Venonat 50: Diglett

Venomoth

49: Venomoth

Kanto

	HeartGold	SoulSilver	FireRed	LeafGreen	Crystal	Gold	Silver	Yellow	Red	Blue
Walking in tall grass or a cave
Berry Forest			5% L37–40	5% L37–40
Cerulean Cave 1F								5% L54	10% L49	10% L49
Cerulean Cave 2F									20% L51	20% L51
Route 10					+10% L15
Route 13					10% L25
Route 14					+10% L28			1% L30
Route 15					+10% L25			1% L30
Route 24	+5% L14	+5% L14				+5% L10	+5% L10
Route 25	+20% L8	+20% L8				+20% L10	+20% L10
Route 9					+10% L15
Safari Zone Area 2, north			5% L32	5% L32					5% L32	5% L32
Safari Zone Area 3, west			5% L32	5% L32					5% L31	5% L31
Victory Road 3F									10% L40	10% L40

Johto

	Crystal	Gold	Silver
Walking in tall grass or a cave
Route 43	+5% L17

Sinnoh

	Platinum	Diamond	Pearl
Walking in tall grass or a cave
Route 229	+20% L49	+20% L50	+20% L50

Unova

	Black 2	White 2	Black	White
Walking in dark grass
Dreamyard			10% L48–50	10% L48–50