Groudon is a massive, bipedal dinosaur-like Pokémon covered in thick, lava-resistant red plating that serves as armor. Gray skin shows underneath, and large white spikes line its head, body, and tail. It's got four claws on each hand, three on each foot (with gray markings), and a tail ending in four dozer-like blades. The coolest detail: blue stripes run inside the seams of its armor, only visible when Groudon glows with power.
Most fans know Groudon as the personification of land itself—basically the creator of the world's continents. It's an absurdly powerful Pokémon capable of summoning intense droughts and volcanic eruptions. Those droughts let it evaporate water, while the eruptions create new land. Historically, Groudon was seen as a savior for drying out flooded regions. It can even travel across water by using magma to form a path beneath itself. When it's not causing geological chaos, Groudon sleeps deep underground in massive magma chambers. Its legendary rivalry with Kyogre is supposedly catastrophic—if they ever meet, the planet itself is in trouble. As a random bonus detail, Groudon apparently loves Groudon Treats made by a Pokémon trainer named Snacksworth, who once spotted it and waved.
Primal Reversion
Groudon can undergo Primal Reversion to become Primal Groudon, its true and original form. The transformation makes it larger and shifts its coloring from dark red to deep crimson, with its underside, spikes, and teeth turning black. The tail blades spread farther apart, and an Ω symbol appears on its arms. Most impressively, its eyes, mouth interior, and the enlarged gaps between its armor plating glow bright yellow, with red irises.
At full power in this state, Primal Groudon radiates so much heat that its body constantly shimmers. In the anime, it's said to literally create new land with every step. The form is fueled by primal energy from deep within the earth—ancient power that emerged during Hoenn's distant past. Primal Groudon needs to continuously feed on this energy to maintain the form. Together with Primal Kyogre, it has the potential to completely destabilize the planet's balance and threaten its very existence.
Content compiled by AnimeList.moe from publicly available sources.