Kanto

HeartGold HeartGold SoulSilver SoulSilver FireRed FireRed LeafGreen LeafGreen Yellow Yellow Red Red Blue Blue
Walking in tall grass or a cave
Diglett's Cave
10%
L19–29
10%
L19–29
5%
L29–31
5%
L29–31
5%
L29–31
5%
L29–31
5%
L29–31

Sinnoh

Platinum Platinum Diamond Diamond Pearl Pearl
Walking in tall grass or a cave
Route 228
10%
L50–52
Not during a swarm
+20%
L51
10%
L52–54
Not during a swarm
+20%
L53
10%
L52–54
Not during a swarm
+20%
L53

Kalos

X X Y Y
Walking on rough terrain
Route 13
40%
L26–28
40%
L26–28