Spikemuth is the only leg in the Gym Challenge without a stadium or a Power Spot to facilitate Dynamax. Instead, the player's challenge begins soon after passing the Pokémon Center, where they must fight a gauntlet of Team Yell Grunts, who reveal themselves to be the Gym Trainers of Spikemuth and formed Team Yell to support the Gym Leader's younger sister Marnie. Occasionally, a Kantonian Mr. Mime will block the path with an invisible wall, forcing the player to defeat a Grunt before they can proceed.
During the post-game, Marnie is revealed to have accepted her older brother's request to replace him as the Spikemuth Gym Leader, and can be challenged to an exhibition match at the Gym.
Pokémon Sword and Shield
Spikemuth has a population of 29, making it the second-smallest settlement in Galar in terms of population after Postwick.