Calcium

A Calcium is a type of medicine that adds 10 Special Attack EVs to a Pokémon if possible. 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 1 special drop. It is a possible drop from rare boss Pokémon. It can also be crafted in an Infuser with 10 Petaya Berries and a Genius Feather.