Route 20: 15 species in 1 game

Road 20: 15 species across 2 versions

Black 2White 2

Black 2: 15 species
Species	Method	Levels	Chance	Game page
Poliwag	Fishing with a super rod	40 to 70	60%	All places
Poliwhirl	Fishing in dark spots	40 to 70	55%	All places
Marill	Surfing in dark spots	5 to 15	30%	All places
Azumarill	Surfing in dark spots	5 to 15	5%	All places
Politoed	Fishing in dark spots	50 to 70	5%	All places
Sunkern	Walking in dark grass	9 to 11	up to 25%	All places
Sunkern	Walking in tall grass or a cave	2 to 4	up to 25%	All places
Dunsparce	Walking in rustling grass	3	10%	All places
Azurill	Surfing	5 to 15	30%	All places
Patrat	Walking in dark grass	10	20%	All places
Patrat	Walking in tall grass or a cave	3	20%	All places
Purrloin	Walking in dark grass	10 to 11	up to 14%	All places
Purrloin	Walking in tall grass or a cave	3 to 4	up to 14%	All places
Pidove	Walking in dark grass	9 to 10	up to 20%	All places
Pidove	Walking in tall grass or a cave	2 to 4	up to 20%	All places
Audino	Walking in rustling grass	2 to 4	90%	All places
Sewaddle	Walking in dark grass	10 to 11	15%	All places
Sewaddle	Walking in tall grass or a cave	2 to 4	35%	All places
Venipede	Walking in dark grass	10	20%	All places
Basculin	Fishing with a super rod	40 to 60	40%	All places
Basculin	Surfing	5 to 15	70%	All places

White 2: 15 species
Species	Method	Levels	Chance	Game page
Poliwag	Fishing with a super rod	40 to 70	60%	All places
Poliwhirl	Fishing in dark spots	40 to 70	55%	All places
Marill	Surfing in dark spots	5 to 15	30%	All places
Azumarill	Surfing in dark spots	5 to 15	5%	All places
Politoed	Fishing in dark spots	50 to 70	5%	All places
Sunkern	Walking in dark grass	9 to 11	up to 25%	All places
Sunkern	Walking in tall grass or a cave	2 to 4	up to 25%	All places
Dunsparce	Walking in rustling grass	3	10%	All places
Azurill	Surfing	5 to 15	30%	All places
Patrat	Walking in dark grass	10	20%	All places
Patrat	Walking in tall grass or a cave	3	20%	All places
Purrloin	Walking in dark grass	10 to 11	up to 14%	All places
Purrloin	Walking in tall grass or a cave	3 to 4	up to 14%	All places
Pidove	Walking in dark grass	9 to 10	up to 20%	All places
Pidove	Walking in tall grass or a cave	2 to 4	up to 20%	All places
Audino	Walking in rustling grass	2 to 4	90%	All places
Sewaddle	Walking in dark grass	10 to 11	15%	All places
Sewaddle	Walking in tall grass or a cave	2 to 4	35%	All places
Venipede	Walking in dark grass	10	20%	All places
Basculin	Fishing in dark spots	40 to 60	40%	All places
Basculin	Surfing in dark spots	5 to 15	65%	All places