Kanto

HeartGold HeartGold SoulSilver SoulSilver Crystal Crystal Gold Gold Silver Silver
Walking in tall grass or a cave
Route 2
north, towards Pewter City
At night
+5%
L7
Route 2
south, towards Viridian City
At night
+5%
L7
At night
+5%
L7
At night
+5%
L7

Johto

Crystal Crystal Gold Gold Silver Silver
Walking in tall grass or a cave
Route 37
At night
+5%
L15

Sinnoh

Platinum Platinum Diamond Diamond Pearl Pearl
Walking in tall grass or a cave
Route 229
At night
+20%
L50
At night
+20%
L52
At night
+20%
L52

Unova

Black 2 Black 2 White 2 White 2 Black Black White White
Walking in dark grass
Dreamyard
10%
L49
10%
L49
Dreamyard
B1F
5%
L49
5%
L49