Question: how do you know how much ev your pokemon has?
Answer: Players in Pokémon Sword and Shield can check EVs from the get-go. Just hit the X button when looking at your Pokémon's stat page and it'll show how their stats have grown. The lighter yellow shows the Pokémon's base stats. The blue indicates that the Pokémon cannot be EV trained any more, according to Serebii.