Galarica Wreath

Galarica Wreath evolves Galarian Slowpoke into Galarian Slowking. It is obtained from a woman in a cave east of The Crown Tundra by combining 15 Galarica Twigs.

Game descriptions

Sword, Shield, B.Diamond, S.Pearl:A wreath made from woven-together Galarica Twigs. Placing it on the head of a Galarian Slowpoke makes the Pokémon very happy.
Scarlet, Violet:A wreath made from woven-together Galarica Twigs. Placing it on the head of a Galarian Slowpoke makes the Pokémon very happy.