Also, when you win a Max Raid Battle against a Milcery during this time, you may receive a Sweet as a reward. Possible Sweets include Star Sweets and Ribbon Sweets—both of which couldn’t be obtained before. Have Milcery hold many different kinds of Sweets you’ve obtained to evolve them into the many forms of Alcremie.
An internet connection is required to battle these special Milcery. As long as your Nintendo Switch is connected to the internet, the kinds of Pokémon that appear in the Wild Area will automatically update to match the latest information. To update manually from your X menu, select Mystery Gift and then Get the Wild Area News.