Milcery evolves into:
- Vanilla Cream Alcremie after spinning clockwise for less than 5 seconds during the day.
- Ruby Cream Alcremie after spinning counterclockwise for less than 5 seconds during the day.
- Matcha Cream Alcremie after spinning clockwise for less than 5 seconds at night.
- Mint Cream Alcremie after spinning counterclockwise for more than 5 seconds at night.
- Lemon Cream Alcremie after spinning clockwise for more than 5 seconds at night.
- Salted Cream Alcremie after spinning counterclockwise for less than 5 seconds at night.
- Ruby Swirl Alcremie after spinning counterclockwise for more than 5 seconds during the day.
- Caramel Swirl Alcremie after spinning clockwise for more than 5 seconds during the day.
- Rainbow Swirl Alcremie after spinning for more than 10 seconds during the evening (between 7:00 and 7:59PM in real-time in Pokémon Sword and Shield).
Alcremie (Bulbapedia)
Equip your Milcery with the desired Sweet (Strawberry, Love, Berry, Clover, Flower, Star, or Ribbon) before spinning to get the form you'd like. A list of all combinations is pictured here.