Ash Ketchum and
Goh once again visit "Slowpoke Island", the island where Slowpoke live. Suddenly "the floating island where Galarian Slowpike live" collides with it and a herd of Galarian Slowpoke led by a Galarian Slowking disembark. Ash and Goh decide to help the Galarian Slowpoke become friends with the Slowpoke.