The Ultra Guardians have been summoned to investigate unusual magnetic activity around Wela Volcano, where they discover a group of Alolan Geodude and Alolan Graveler munching on Spark Stones. But our heroes also find a group of rock hunters who are after the Spark Stones for themselves. The Ultra Guardians spring into action…but so does an enraged Alolan Golem, who sends the rock hunters packing! Thanks to the efforts of Sophocles’s friend Metang, the Golem eventually calms down—and it happily joins a group of Hikers who promise to keep watch over the volcano!