After Glacia arrived to the Island Cave, she sent Snorunt and Spheal to attack to get Regice's attention. They both fired ice-type attacks, but this did not work, as Regice stood unfazed. Fortunately, Sapphire, who was blown away from Sootopolis City, gave the letter to Steven and borrowed him her Relicanth and Wailord. Using these Pokémon, Steven performed the ritual, awakening the Legendary Golems, as Glacia and her Pokémon saw Regice coming out of the Island Cave.
None of Snorunt's moves are known.