Route 18

	HeartGold	SoulSilver	Yellow	Red	Blue
Walking in tall grass or a cave
Doduo			40% L22–26	25% L24–28	25% L24–28
Fearow	+30% L27–29 +30% L27–29 +10% L27 +10% L27	+30% L27–29 +30% L27–29 +10% L27 +10% L27	5% L24	15% L25–29	15% L25–29
Grimer	20% L26 +20% L27 +30% L26–28 +10% L27	20% L26 +20% L27 +30% L26–28 +10% L27
Minun	+20% L28	+20% L28
Muk	5% L30 +10% L29	5% L30 +10% L29
Plusle	+20% L26–27	+20% L26–27
Raticate			5% L25–26	20% L25–29	20% L25–29
Rattata			25% L23–24
Shinx	+40% L26–28	+40% L26–28
Slugma	5% L27	5% L27
Spearow			25% L22–23	40% L20–22	40% L20–22
	HeartGold	SoulSilver	Yellow	Red	Blue
Fishing with an Old Rod
Magikarp			100% L5	100% L5	100% L5
	HeartGold	SoulSilver	Yellow	Red	Blue
Fishing with a Good Rod
Goldeen			50% L10	50% L10	50% L10
Poliwag			50% L10	50% L10	50% L10
	HeartGold	SoulSilver	Yellow	Red	Blue
Fishing with a Super Rod
Goldeen				25% L15	25% L15
Krabby				25% L15	25% L15
Magikarp				25% L15	25% L15
Shellder			60% L20–40
Tentacool			40% L15	25% L5	25% L5

	FireRed	LeafGreen
Walking in tall grass or a cave
Doduo	35% L24–28	35% L24–28
Fearow	15% L25–29	15% L25–29
Raticate	15% L25–29	15% L25–29
Rattata	5% L22	5% L22
Spearow	30% L20–22	30% L20–22