From Bulbapedia, the community-driven Pokémon encyclopedia.

Gen	Game	Rarity	Location
I	Pokémon Red and Blue	None	Trade
	Pokémon Yellow	None	Trade
II	Pokémon Gold and Silver	None	Trade
	Pokémon Crystal	None	Trade
III	Pokémon Ruby and Sapphire	None	Trade
	Pokémon Emerald	None	Trade
	Pokémon FireRed and LeafGreen	None	Trade
	Pokémon Colosseum	None	Trade
	Pokémon XD: Gale of Darkness	None	Trade
IV	Pokémon Diamond and Pearl	None	Trade
	Pokémon Platinum		Unknown
	Pal Park		[[List of Pokémon by Pal Park location#|]]