Route 34: 37 species in 3 games

Gold and Silver Crystal HeartGold and SoulSilver

Road 34: 37 species across 5 versions

GoldSilverCrystalHeartGold and SoulSilver

Gold: 16 species
Species	Method	Levels	Chance	Game page
Caterpie	Headbutting a high encounter rate tree	10	50%	All places
Caterpie	Headbutting a low encounter rate tree	10	65%	All places
Caterpie	Headbutting a normal encounter rate tree	10	65%	All places
Metapod	Headbutting a low encounter rate tree	10	15%	All places
Metapod	Headbutting a normal encounter rate tree	10	15%	All places
Butterfree	Headbutting a high encounter rate tree	10	5%	All places
Butterfree	Headbutting a low encounter rate tree	10	5%	All places
Butterfree	Headbutting a normal encounter rate tree	10	5%	All places
Rattata	Walking in tall grass or a cave	11 to 13	35%	All places
Abra	Walking in tall grass or a cave	10	10%	All places
Tentacool	Surfing	15 to 24	90%	All places
Tentacruel	Surfing	20 to 24	10%	All places
Drowzee	Walking in tall grass or a cave	10 to 12	50%	All places
Krabby	Fishing with a good rod	20	up to 55%	All places
Krabby	Fishing with an old rod	10	15%	All places
Krabby	Fishing with a super rod	40	up to 60%	All places
Kingler	Fishing with a super rod	40	up to 10%	All places
Exeggcute	Headbutting a high encounter rate tree	10	15%	All places
Exeggcute	Headbutting a low encounter rate tree	10	15%	All places
Exeggcute	Headbutting a normal encounter rate tree	10	15%	All places
Staryu	Fishing with a good rod	20	10%	All places
Staryu	Fishing with a super rod	40	30%	All places
Magikarp	Fishing with a good rod	20	up to 35%	All places
Magikarp	Fishing with an old rod	10	85%	All places
Ditto	Walking in tall grass or a cave	10	5%	All places
Pineco	Headbutting a high encounter rate tree	10	30%	All places
Corsola	Fishing with a good rod	20	up to 10%	All places
Corsola	Fishing with a super rod	40	up to 30%	All places

Silver: 16 species
Species	Method	Levels	Chance	Game page
Weedle	Headbutting a high encounter rate tree	10	50%	All places
Weedle	Headbutting a low encounter rate tree	10	65%	All places
Weedle	Headbutting a normal encounter rate tree	10	65%	All places
Kakuna	Headbutting a low encounter rate tree	10	15%	All places
Kakuna	Headbutting a normal encounter rate tree	10	15%	All places
Beedrill	Headbutting a high encounter rate tree	10	5%	All places
Beedrill	Headbutting a low encounter rate tree	10	5%	All places
Beedrill	Headbutting a normal encounter rate tree	10	5%	All places
Rattata	Walking in tall grass or a cave	11 to 13	35%	All places
Abra	Walking in tall grass or a cave	10	10%	All places
Tentacool	Surfing	15 to 24	90%	All places
Tentacruel	Surfing	20 to 24	10%	All places
Drowzee	Walking in tall grass or a cave	10 to 12	50%	All places
Krabby	Fishing with a good rod	20	up to 55%	All places
Krabby	Fishing with an old rod	10	15%	All places
Krabby	Fishing with a super rod	40	180%	All places
Kingler	Fishing with a super rod	40	30%	All places
Exeggcute	Headbutting a high encounter rate tree	10	15%	All places
Exeggcute	Headbutting a low encounter rate tree	10	15%	All places
Exeggcute	Headbutting a normal encounter rate tree	10	15%	All places
Staryu	Fishing with a good rod	20	10%	All places
Staryu	Fishing with a super rod	40	30%	All places
Magikarp	Fishing with a good rod	20	up to 35%	All places
Magikarp	Fishing with an old rod	10	85%	All places
Ditto	Walking in tall grass or a cave	10	5%	All places
Pineco	Headbutting a high encounter rate tree	10	30%	All places
Corsola	Fishing with a good rod	20	up to 10%	All places
Corsola	Fishing with a super rod	40	60%	All places

Crystal: 26 species
Species	Method	Levels	Chance	Game page
Pidgey	Walking in tall grass or a cave	12	up to 20%	All places
Rattata	Walking in tall grass or a cave	11	up to 30%	All places
Jigglypuff	Walking in tall grass or a cave	12	up to 5%	All places
Abra	Walking in tall grass or a cave	10	up to 10%	All places
Tentacool	Surfing	15 to 24	90%	All places
Tentacruel	Surfing	20 to 24	10%	All places
Drowzee	Walking in tall grass or a cave	12	30%	All places
Krabby	Fishing with a good rod	20	up to 55%	All places
Krabby	Fishing with an old rod	10	15%	All places
Krabby	Fishing with a super rod	40	up to 60%	All places
Kingler	Fishing with a super rod	40	up to 10%	All places
Exeggcute	Headbutting a high encounter rate tree	10	20%	All places
Exeggcute	Headbutting a low encounter rate tree	10	20%	All places
Exeggcute	Headbutting a normal encounter rate tree	10	20%	All places
Staryu	Fishing with a good rod	20	10%	All places
Staryu	Fishing with a super rod	40	30%	All places
Magikarp	Fishing with a good rod	20	up to 35%	All places
Magikarp	Fishing with an old rod	10	85%	All places
Ditto	Walking in tall grass or a cave	10	up to 5%	All places
Hoothoot	Headbutting a high encounter rate tree	10	50%	All places
Hoothoot	Headbutting a low encounter rate tree	10	50%	All places
Hoothoot	Headbutting a normal encounter rate tree	10	50%	All places
Hoothoot	Walking in tall grass or a cave	12	20%	All places
Ledyba	Headbutting a low encounter rate tree	10	15%	All places
Ledyba	Headbutting a normal encounter rate tree	10	15%	All places
Spinarak	Headbutting a low encounter rate tree	10	15%	All places
Spinarak	Headbutting a normal encounter rate tree	10	15%	All places
Pichu	Receive egg as a gift	5	100%	All places
Cleffa	Receive egg as a gift	5	100%	All places
Igglybuff	Receive egg as a gift	5	100%	All places
Pineco	Headbutting a high encounter rate tree	10	30%	All places
Snubbull	Walking in tall grass or a cave	10	up to 30%	All places
Corsola	Fishing with a good rod	20	up to 10%	All places
Corsola	Fishing with a super rod	40	up to 30%	All places
Tyrogue	Receive egg as a gift	5	100%	All places
Smoochum	Receive egg as a gift	5	100%	All places
Elekid	Receive egg as a gift	5	100%	All places
Magby	Receive egg as a gift	5	100%	All places

HeartGold and SoulSilver: 20 species
Species	Method	Levels	Chance	Game page
Rattata	Walking in tall grass or a cave	11 to 13	up to 20%	All places
Abra	Walking in tall grass or a cave	10	10%	All places
Tentacool	Surfing	10 to 25	90%	All places
Tentacruel	Surfing	15 to 29	10%	All places
Drowzee	Walking in tall grass or a cave	10 to 12	up to 30%	All places
Krabby	Fishing with a good rod	20	50%	All places
Krabby	Fishing with an old rod	10	15%	All places
Krabby	Fishing with a super rod	40	60%	All places
Kingler	Fishing with a super rod	40	10%	All places
Exeggcute	Headbutting trees	9 to 12	up to 20%	All places
Staryu	Fishing with a good rod	20	10%	All places
Staryu	Fishing with a super rod	40	30%	All places
Magikarp	Fishing with a good rod	20	40%	All places
Magikarp	Fishing with an old rod	10	85%	All places
Ditto	Walking in tall grass or a cave	10	5%	All places
Hoothoot	Headbutting trees	9 to 12	up to 50%	All places
Spinarak	Headbutting trees	11 to 12	30%	All places
Pineco	Headbutting trees	9 to 10	30%	All places
Corsola	Fishing with a good rod	20	up to 10%	All places
Corsola	Fishing with a super rod	40	up to 30%	All places
Linoone	Walking in tall grass or a cave	12	20%	All places
Ralts	Walking in tall grass or a cave	10 to 11	40%	All places
Whismur	Walking in tall grass or a cave	10 to 11	20%	All places
Bidoof	Walking in tall grass or a cave	12	20%	All places
Buizel	Walking in tall grass or a cave	10 to 11	20%	All places