It is not known to evolve into or from any other Pokémon.
Groudon possesses the ability to expand continents. In ancient times it came in conflict with Kyogre, a Pokémon with the ability to expand the oceans. In Pokémon Ruby and Emerald Versions, Groudon is sought after by Team Magma as a major part of their plot to create more habitats for land Pokémon by lowering the sea level.
Groudon is the version mascot of Pokémon Ruby, appearing on the boxart.
Along with Kyogre and Rayquaza, Groudon is a part of the weather trio.
Groudon is a massive, bipedal, dinosaur-like creature covered in red, segmented plates of thick skin that act as armor. It has a gray underside and large white spikes that run along the sides of its head, body, and tail. It has four claws on each hand, four dozer-like blades on the end of its large tail, and three claws on each foot with grey markings under its feet. It also has blue stripes inside the
seams of its armor plating which can only be seen when Groudon is glowing with power.
It is said to be the creator of land in the Pokémon world, bearing immense power over heat and light and using that to evaporate flooded lands. It sleeps underground in large magma chambers, and causes volcanoes to erupt when it awakens. If it encounters its rival, Kyogre, they will engage in a cataclysmic battle.