While taking a hike through the volcanic mountains of Hoenn, everything around you begins to rumble and shake. As it does, you look to see a volcano erupting. But as the lava flows, something rises out of the volcano as well. It was the legendary Pokémon Groudon, having undergone Primal Reversion and becoming Primal Groudon. as it looked around the area, it let out a terrifying roar.