31: Nidoqueen 33: Nidorino

Nidoran♂

32: Nidoran♂

Kanto

	FireRed	LeafGreen	Yellow	Red	Blue
Walking in tall grass or a cave
Route 10			10% L17
Route 2 south, towards Viridian City			15% L4–6
Route 22			30% L2–4	40% L2–4	5% L3–4
Route 3	14% L6–7	1% L6
Route 9			30% L16–18
Safari Zone Area 1, east	20% L24	5% L24	20% L21	20% L24	5% L24
Safari Zone Area 2, north	20% L30		20% L36	20% L22
Safari Zone Area 3, west	20% L22	5% L30	20% L29	20% L25	5% L25
Safari Zone middle	20% L22		20% L14	20% L22

Johto

	HeartGold	SoulSilver	Crystal	Gold	Silver
Walking in tall grass or a cave
National Park			+30% L12 +30% L12
Route 35	+20% L12 +10% L12	+20% L12 +10% L12	+30% L12 +30% L12 +30% L12	+30% L12 +30% L12 +30% L12 +30% L12	+30% L12 +30% L12 +30% L12 +30% L12
Route 36	20% L12 +10% L12	20% L12 +10% L13 +10% L12 +10% L12		+30% L12 +30% L12 +30% L12	+30% L12 +30% L12 +30% L12

Sinnoh

	Platinum	Diamond	Pearl
Walking in tall grass or a cave
Route 201	+11% L2–3	+2% L2	+20% L3