Old Chateau

Pokemon	Levels	Method	Rarity
Gastly	12-16	Walking in tall grass or a cave	900%
Gengar	16	Walking in tall grass or a cave	20%
Haunter	16	Walking in tall grass or a cave	340%

Pokemon	Levels	Method	Rarity
Gastly	14-17	Walking in tall grass or a cave	900%
Gengar	17	Walking in tall grass or a cave	20%