Protein

A Protein is a type of Medicine that adds 10 Attack EVs to a Pokémon if possible, but will not raise a Pokémon's Attack EVs above 100. It also raises a Pokémon's happiness by 5, 3, or 2 depending on how much happiness the Pokémon initially has.

It can be obtained as a tier 2 special drop. It can also be crafted in an Infuser with 10 Liechi Berries and a Muscle Feather