Route 44: 15 species in 3 games

Road 44: 15 species across 5 versions

GoldSilverCrystalHeartGold and SoulSilver

Gold: 11 species
Species	Method	Levels	Chance	Game page
Spearow	Headbutting a high encounter rate tree	10	50%	All places
Spearow	Headbutting a low encounter rate tree	10	80%	All places
Spearow	Headbutting a normal encounter rate tree	10	80%	All places
Poliwag	Fishing with a good rod	20	65%	All places
Poliwag	Fishing with an old rod	10	15%	All places
Poliwag	Fishing with a super rod	40	70%	All places
Poliwag	Surfing	20 to 29	90%	All places
Poliwhirl	Surfing	25 to 29	10%	All places
Bellsprout	Walking in tall grass or a cave	22	20%	All places
Weepinbell	Walking in tall grass or a cave	22 to 24	35%	All places
Lickitung	Walking in tall grass or a cave	24 to 26	15%	All places
Tangela	Walking in tall grass or a cave	23	30%	All places
Magikarp	Fishing with a good rod	20	35%	All places
Magikarp	Fishing with an old rod	10	85%	All places
Magikarp	Fishing with a super rod	40	20%	All places
Aipom	Headbutting a high encounter rate tree	10	20%	All places
Aipom	Headbutting a low encounter rate tree	10	20%	All places
Aipom	Headbutting a normal encounter rate tree	10	20%	All places
Heracross	Headbutting a high encounter rate tree	10	30%	All places
Remoraid	Fishing with a good rod	20	65%	All places
Remoraid	Fishing with an old rod	10	15%	All places
Remoraid	Fishing with a super rod	40	up to 100%	All places

Silver: 11 species
Species	Method	Levels	Chance	Game page
Spearow	Headbutting a high encounter rate tree	10	50%	All places
Spearow	Headbutting a low encounter rate tree	10	80%	All places
Spearow	Headbutting a normal encounter rate tree	10	80%	All places
Poliwag	Fishing with a good rod	20	65%	All places
Poliwag	Fishing with an old rod	10	15%	All places
Poliwag	Fishing with a super rod	40	70%	All places
Poliwag	Surfing	20 to 29	90%	All places
Poliwhirl	Surfing	25 to 29	10%	All places
Bellsprout	Walking in tall grass or a cave	22	20%	All places
Weepinbell	Walking in tall grass or a cave	22 to 24	35%	All places
Lickitung	Walking in tall grass or a cave	24 to 26	15%	All places
Tangela	Walking in tall grass or a cave	23	30%	All places
Magikarp	Fishing with a good rod	20	35%	All places
Magikarp	Fishing with an old rod	10	85%	All places
Magikarp	Fishing with a super rod	40	20%	All places
Aipom	Headbutting a high encounter rate tree	10	20%	All places
Aipom	Headbutting a low encounter rate tree	10	20%	All places
Aipom	Headbutting a normal encounter rate tree	10	20%	All places
Heracross	Headbutting a high encounter rate tree	10	30%	All places
Remoraid	Fishing with a good rod	20	65%	All places
Remoraid	Fishing with an old rod	10	15%	All places
Remoraid	Fishing with a super rod	40	110%	All places

Crystal: 10 species
Species	Method	Levels	Chance	Game page
Spearow	Headbutting a high encounter rate tree	10	50%	All places
Spearow	Headbutting a low encounter rate tree	10	80%	All places
Spearow	Headbutting a normal encounter rate tree	10	80%	All places
Poliwag	Fishing with a good rod	20	65%	All places
Poliwag	Fishing with an old rod	10	15%	All places
Poliwag	Fishing with a super rod	40	80%	All places
Poliwag	Surfing	20 to 29	90%	All places
Poliwag	Walking in tall grass or a cave	22	30%	All places
Poliwhirl	Surfing	25 to 29	10%	All places
Poliwhirl	Walking in tall grass or a cave	24 to 26	10%	All places
Bellsprout	Walking in tall grass or a cave	22	up to 20%	All places
Weepinbell	Walking in tall grass or a cave	24	up to 10%	All places
Lickitung	Walking in tall grass or a cave	22 to 26	up to 40%	All places
Tangela	Walking in tall grass or a cave	23	up to 30%	All places
Magikarp	Fishing with a good rod	20	35%	All places
Magikarp	Fishing with an old rod	10	85%	All places
Magikarp	Fishing with a super rod	40	20%	All places
Aipom	Headbutting a high encounter rate tree	10	20%	All places
Aipom	Headbutting a low encounter rate tree	10	20%	All places
Aipom	Headbutting a normal encounter rate tree	10	20%	All places
Heracross	Headbutting a high encounter rate tree	10	30%	All places

HeartGold and SoulSilver: 15 species
Species	Method	Levels	Chance	Game page
Spearow	Headbutting trees	21 to 24	up to 80%	All places
Poliwag	Fishing with a good rod	20	up to 30%	All places
Poliwag	Fishing with an old rod	10	15%	All places
Poliwag	Fishing with a super rod	40	70%	All places
Poliwag	Surfing	15 to 30	90%	All places
Poliwhirl	Surfing	20 to 30	10%	All places
Bellsprout	Walking in tall grass or a cave	22	20%	All places
Weepinbell	Walking in tall grass or a cave	22 to 24	up to 25%	All places
Lickitung	Walking in tall grass or a cave	24 to 26	15%	All places
Tangela	Walking in tall grass or a cave	23	up to 20%	All places
Magikarp	Fishing with a good rod	20	40%	All places
Magikarp	Fishing with an old rod	10	up to 70%	All places
Magikarp	Fishing with a super rod	40	20%	All places
Aipom	Headbutting trees	21 to 24	up to 20%	All places
Heracross	Headbutting trees	21 to 22	30%	All places
Remoraid	Fishing with a good rod	20	up to 65%	All places
Remoraid	Fishing with an old rod	10	15%	All places
Remoraid	Fishing with a super rod	40	up to 90%	All places
Linoone	Walking in tall grass or a cave	22	20%	All places
Whismur	Walking in tall grass or a cave	22 to 23	20%	All places
Bidoof	Walking in tall grass or a cave	22	20%	All places
Buizel	Walking in tall grass or a cave	22 to 23	20%	All places