Hammerlocke Stadium is the largest building in the city and is the site at which the eighth installment in the Galarregion's Gym Challenge takes place. It is located at the central part of the city, past the center Pokémon Center.
While pursuing Sordward and Shielbert, the brothers will use their stock of Wishing Stars to force multiple Pokémon from the Stadium to Dynamax against their will, causing them to rampage in the Stadium. The player will face a Haxorus with their party while Hop, Piers, and Raihan handle the rest.
Hammerlocke Stadium was first mentioned, although not by name, in SS012, where Lance revealed he had once trained there. He had also been impressed by the Gym's uniform and its rich history, and had used it as the basis of his own current outfit.