Below are the items that get 20 Base Power when Fling is utilised

Picture	Name	Normal Effect
	Boiled Egg	One of the many ingredients that can be used for cooking at your camp. Even just one boiled egg can really enhance a dish.
	Clever Feather	An item to be used on a Pokémon. This feather slightly increases base points for a Pokémon's Sp. Def stat.
	Fancy Apple	One of the many ingredients that can be used for cooking at your camp. An apple chosen above others. It has spectacular form and a brilliant sheen.
	Genius Feather	An item to be used on a Pokémon. This feather slightly increases base points for a Pokémon's Sp. Atk stat.
	Health Feather	An item to be used on a Pokémon. This feather slightly increases base points for a Pokémon's HP stat.
	Large Leek	One of the many ingredients that can be used for cooking at your camp. Whether this is the kind of vegetable stalk that Farfetch'd like is unknown.
	Moomoo Cheese	One of the many ingredients that can be used for cooking at your camp. Melted cheese can really give a curry some richness.
	Muscle Feather	An item to be used on a Pokémon. This feather slightly increases base points for a Pokémon's Attack stat.
	Pretty Feather	Though this feather is beautiful, it's just a regular feather and has no effect.
	Resist Feather	An item to be used on a Pokémon. This feather slightly increases base points for a Pokémon's Defense stat.
	Swift Feather	An item to be used on a Pokémon. This feather slightly increases base points for a Pokémon's Speed stat.
	TR82	The user attacks the target with stored power. The more the user's stats are raised, the greater the move's power.