Species: alcremie
Alcremie (マホイップ, Mawhip) is a Fairy-type Pokémon introduced in Generation VIII. It evolves from Milcery when the player gives it a sweet to hold and then spins on the spot in the overworld for a few seconds. This evolution method is a reference to how whipped cream, which Alcremie resembles, is made.
Alcremie has 63 different forms, along with a Gigantamax form, which is the signature Pokémon of Gym Leader Opal. It has seven shiny variations, which only differ in what sweet they have on them, and are all the same colour. Which form of Alcremie the Milcery becomes depends on the time of day, how long the player spins, whether they spin clockwise or counterclockwise, and which sweet they give to Milcery.
Alcremie has the most alternate forms out of any Pokémon, beating the previous holder of the title, Unown, which only has 28 forms.
See also
This tag implicates generation_8_pokemon (learn more).