Route 7: 12 species in 1 game

Road 7: 12 species across 2 versions

X and Y

X and Y: 11 species
Species	Method	Levels	Chance	Game page
Psyduck	Encountering 5 pokemon within grass, flowers, or within a cave	7	35%	All places
Snorlax	Static encounter	15	100%	All places
Hoppip	Encountering 5 pokemon within grass, flowers, or within a cave	7	60%	All places
Smeargle	Walking in purple flowers	14	10%	All places
Smeargle	Walking in tall grass or a cave	14	10%	All places
Smeargle	Walking in yellow flowers	14	10%	All places
Volbeat	Walking in purple flowers	13	10%	All places
Volbeat	Walking in tall grass or a cave	13	10%	All places
Volbeat	Walking in yellow flowers	13	10%	All places
Illumise	Walking in purple flowers	13	10%	All places
Illumise	Walking in tall grass or a cave	13	10%	All places
Illumise	Walking in yellow flowers	13	10%	All places
Roselia	Encountering 5 pokemon within grass, flowers, or within a cave	8	5%	All places
Roselia	Walking in purple flowers	14	10%	All places
Roselia	Walking in tall grass or a cave	14	10%	All places
Roselia	Walking in yellow flowers	14	10%	All places
Croagunk	Walking in purple flowers	14	5%	All places
Croagunk	Walking in tall grass or a cave	12 to 14	35%	All places
Croagunk	Walking in yellow flowers	14	5%	All places
Ducklett	Walking in purple flowers	14	10%	All places
Ducklett	Walking in tall grass or a cave	14	10%	All places
Ducklett	Walking in yellow flowers	14	10%	All places
Flabébé	Walking in purple flowers	12 to 14	35%	All places
Flabébé	Walking in tall grass or a cave	13 to 14	5%	All places
Flabébé	Walking in yellow flowers	12 to 14	35%	All places
Swirlix	Walking in purple flowers	14	10%	All places
Swirlix	Walking in tall grass or a cave	14	10%	All places
Swirlix	Walking in yellow flowers	14	10%	All places