Route 31

	HeartGold	SoulSilver
Walking in tall grass or a cave
Bellsprout	+20% L3	+20% L3
Bidoof	+20% L3	+20% L3
Buizel	+20% L3–4	+20% L4
Caterpie	+25% L4–5 +25% L4–5 +10% L4 +10% L4
Hoothoot	+10% L5	+30% L4–5 +10% L4
Kakuna		+10% L5 +15% L5
Ledyba		+20% L4 +10% L4
Linoone	+20% L3	+20% L3
Metapod	+15% L5 +15% L5
Pidgey	+20% L3 +20% L3 +10% L3 +10% L3	+10% L5 +20% L4 +10% L4
Rattata	+30% L4–5 +10% L4	+30% L4–5 +10% L4
Spinarak	+20% L3 +10% L3
Weedle		+20% L4 +25% L4–5 +10% L4 +10% L4
Whismur	+20% L3–4	+20% L4
	HeartGold	SoulSilver
Fishing with an Old Rod
Magikarp	85% L10	85% L10
Poliwag	15% L10	15% L10
	HeartGold	SoulSilver
Fishing with a Good Rod
Magikarp	40% L20	40% L20
Poliwag	60% L20	60% L20
	HeartGold	SoulSilver
Fishing with a Super Rod
Magikarp	20% L40	20% L40
Poliwag	80% L40	80% L40
	HeartGold	SoulSilver
Surfing
Poliwag	90% L10–25	90% L10–25
Poliwhirl	10% L15–32	10% L15–32