21: Spearow 23: Ekans

Fearow

22: Fearow

Kanto

	HeartGold	SoulSilver	FireRed	LeafGreen	Crystal	Gold	Silver	Yellow	Red	Blue
Walking in tall grass or a cave
Canyon Entrance			15% L48–50	15% L48–50
Cape Brink			10% L36	10% L36
Kindle Road			10% L36	10% L36
Mt. Ember			25% L38–40	25% L38–40
Route 10	+10% L18 +10% L18	+10% L18 +10% L18			+10% L15 +10% L15	+10% L18 +10% L18	+10% L18 +10% L18
Route 16	+30% L27–29 +30% L27–29 +10% L27 +10% L27	+30% L27–29 +30% L27–29 +10% L27 +10% L27			+45% L27–29 +40% L27–29	+40% L27–29 +40% L27–29	+40% L27–29 +40% L27–29	5% L24
Route 17	+30% L28–30 +30% L28–30 +10% L28 +10% L28	+30% L28–30 +30% L28–30 +10% L28 +10% L28	5% L25–27	5% L25–27	+40% L30–32 +40% L30–32	+40% L28–30 +40% L28–30	+40% L28–30 +40% L28–30	25% L27–29	5% L25–27	5% L25–27
Route 18	+30% L27–29 +30% L27–29 +10% L27 +10% L27	+30% L27–29 +30% L27–29 +10% L27 +10% L27	15% L25–29	15% L25–29	+45% L27–29 +40% L27–29	+40% L27–29 +40% L27–29	+40% L27–29 +40% L27–29	5% L24	15% L25–29	15% L25–29
Route 22	+5% L7 +5% L7	+5% L7 +5% L7			+5% L7 +5% L7	+5% L7 +5% L7	+5% L7 +5% L7
Route 23			25% L40–44	25% L40–44				15% L40–45	25% L38–43	25% L38–43
Route 9	+5% L15 +5% L15	+5% L15 +5% L15			+15% L15 +15% L15	+5% L15 +5% L15	+5% L15 +5% L15	1% L19
Ruin Valley			10% L49	10% L49
Sevault Canyon			10% L50	15% L50
Treasure Beach			20% L36–40	20% L36–40
Water Path			15% L48–50	15% L48–50

Johto

	HeartGold	SoulSilver	Crystal	Gold	Silver
Walking in tall grass or a cave
Route 42			+5% L16 +5% L16
Route 47	4% L34	4% L34
Route 48	+10% L21	+10% L21

Sinnoh

	Platinum	Diamond	Pearl
Walking in tall grass or a cave
Route 225	+20% L48–50 +20% L48–50 +10% L49	+20% L51 +20% L50–52 +20% L50–52	+20% L51 +20% L50–52 +20% L50–52
Route 227	+10% L51 +10% L51 +10% L53	+10% L54 +10% L54 +10% L55	+10% L54 +10% L54 +10% L55
Sea Route 226	+20% L48–50 +20% L48–50	+20% L52 +20% L51–53 +20% L51–53	+20% L52 +20% L51–53 +20% L51–53
Stark Mountain	+10% L51 +10% L51 +10% L53	+10% L54 +10% L54 +10% L55	+10% L54 +10% L54 +10% L55

Unova

	Black 2	White 2	Black	White
Walking in tall grass or a cave
Route 15			30% L48–50	30% L48–50
	Black 2	White 2	Black	White
Walking in dark grass
Route 15			30% L58–60	30% L58–60