Route 38: 25 species in 3 games

Road 38: 25 species across 5 versions

Gold: 12 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	16	up to 40%	All places
Raticate	Walking in tall grass or a cave	16	up to 30%	All places
Magnemite	Walking in tall grass or a cave	16	up to 20%	All places
Farfetch’d	Walking in tall grass or a cave	16	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
Tauros	Walking in tall grass or a cave	13	up to 5%	All places
Pineco	Headbutting a high encounter rate tree	10	30%	All places
Snubbull	Walking in tall grass or a cave	13 to 16	up to 30%	All places
Miltank	Walking in tall grass or a cave	13	up to 5%	All places

Silver: 13 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	16	30%	All places
Raticate	Walking in tall grass or a cave	16	up to 30%	All places
Meowth	Walking in tall grass or a cave	16	up to 30%	All places
Magnemite	Walking in tall grass or a cave	16	up to 20%	All places
Farfetch’d	Walking in tall grass or a cave	16	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
Tauros	Walking in tall grass or a cave	13	up to 5%	All places
Pineco	Headbutting a high encounter rate tree	10	30%	All places
Snubbull	Walking in tall grass or a cave	13 to 16	up to 30%	All places
Miltank	Walking in tall grass or a cave	13	up to 5%	All places

Crystal: 13 species
Species	Method	Levels	Chance	Game page
Pidgeotto	Walking in tall grass or a cave	16	up to 10%	All places
Rattata	Walking in tall grass or a cave	16	up to 30%	All places
Raticate	Walking in tall grass or a cave	16	up to 30%	All places
Meowth	Walking in tall grass or a cave	16	40%	All places
Magnemite	Walking in tall grass or a cave	16	up to 20%	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
Tauros	Walking in tall grass or a cave	13	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
Noctowl	Walking in tall grass or a cave	16	10%	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
Pineco	Headbutting a high encounter rate tree	10	30%	All places
Miltank	Walking in tall grass or a cave	13	up to 5%	All places

HeartGold: 15 species
Species	Method	Levels	Chance	Game page
Rattata	Walking in tall grass or a cave	16	up to 20%	All places
Raticate	Walking in tall grass or a cave	16	up to 20%	All places
Magnemite	Walking in tall grass or a cave	16	20%	All places
Farfetch’d	Walking in tall grass or a cave	16	up to 10%	All places
Exeggcute	Headbutting trees	13 to 25	up to 65%	All places
Tauros	Walking in tall grass or a cave	13	4%	All places
Hoothoot	Headbutting trees	13 to 16	up to 50%	All places
Spinarak	Headbutting trees	15 to 16	30%	All places
Pineco	Headbutting trees	13 to 14	30%	All places
Snubbull	Walking in tall grass or a cave	13 to 16	up to 40%	All places
Miltank	Walking in tall grass or a cave	13	5%	All places
Plusle	Walking in tall grass or a cave	16	20%	All places
Minun	Walking in tall grass or a cave	16	20%	All places
Shinx	Walking in tall grass or a cave	16	40%	All places
Burmy	Headbutting trees	18 to 25	35%	All places

SoulSilver: 15 species
Species	Method	Levels	Chance	Game page
Raticate	Walking in tall grass or a cave	16	up to 20%	All places
Meowth	Walking in tall grass or a cave	16	up to 20%	All places
Magnemite	Walking in tall grass or a cave	16	20%	All places
Farfetch’d	Walking in tall grass or a cave	16	up to 10%	All places
Exeggcute	Headbutting trees	13 to 25	up to 65%	All places
Tauros	Walking in tall grass or a cave	13	4%	All places
Hoothoot	Headbutting trees	13 to 16	up to 50%	All places
Ledyba	Headbutting trees	15 to 16	30%	All places
Pineco	Headbutting trees	13 to 14	30%	All places
Snubbull	Walking in tall grass or a cave	13 to 16	up to 40%	All places
Miltank	Walking in tall grass or a cave	13	5%	All places
Plusle	Walking in tall grass or a cave	16	20%	All places
Minun	Walking in tall grass or a cave	16	20%	All places
Shinx	Walking in tall grass or a cave	16	40%	All places
Burmy	Headbutting trees	18 to 25	35%	All places