Groudon is a Ground type Legendary Pokemon introduced in Generation III. While it is not known to evolve into or from any other Pokemon, it can undergo Primal Reversion and become Primal Groudon if it holds the Red Orb.

Groudon possesses the ability to expand continents. In ancient times it came in conflict with Kyogre, a Pokemon with the ability to expand the oceans. In Pokemon Ruby, Emerald, and Omega Ruby, Groudon is sought after by Team Magma as a major part of their plot to create more habitats for land Pokemon by lowering the sea level.

Groudon is the game mascot of Pokemon Ruby and its remake Pokemon Omega Ruby, with Groudon appearing on the box art of Ruby and Primal Groudon appearing on the box art of Omega Ruby. Along with Kyogre and Rayquaza, Groudon is part of the weather trio. Take a look below for 30 fun and interesting facts about Groudon.

1. Groudon is a massive, bipedal, dinosaur like creature covered in red, segmented plates of thick skin that act as armor.

2. It has a gray underside and large white spikes that run along the sides of its head, body, and tail.

3. 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 gray markings under its feet.

4. It also has blue stripes inside the seams of its armor plating which can only be seen when Groudon is glowing with power.

5. As Primal Groudon, its appearance is similar to Groudon, but larger in size. Its skin color changes from dark red to deep crimson with its underside, spikes, and teeth turning black. The blades on its tail are more separated from one another. The Ω symbol is now shown on its arms. Its eyes, the inside of its mouth, and the now-enlarged openings between its armor plating glow bright yellow, and its irises are now red.

6. The energy that fills Primal Groudon pours forth as magma, and it burns with such an extreme temperature that its body is always shimmering with the haze of its heat.

7. In the anime, Primal Groudon is said to create new land with every step it takes.

8. Groudon is an immensely powerful Pokémon, having the ability to summon intense droughts and cause volcanic eruptions.

9. The droughts it can cause allow it to evaporate water, while the volcanic eruptions it can summon enable it to create land. 

10. It sleeps underground in large magma chambers. 

11. If it encounters its rival, Kyogre, they will engage in a cataclysmic battle.

12. Groudon is the only known Pokémon capable of learning the move Precipice Blades.

13. Groudon’s Attack and Special Attack, and Defense and Special Defense are the reverse of Kyogre’s.

14. In games prior to Pokémon Omega Ruby and Alpha Sapphire, Groudon has a catch rate of 5.

15. Primal Groudon is the tallest Fire-type Pokémon.

16. Primal Groudon is the heaviest Ground-type and Fire-type Pokémon.

17. Groudon shares its category name with Torterra. They are both known as the Continent Pokémon.

18. Primal Groudon has the highest base Attack stat and base stat total of all Ground-type and Fire-type Pokémon.

19. The fake Groudon in Jirachi: Wish Maker is much taller than its game height of 11′ 06″, being as tall as the mountainous structures in Forina. When an actual Groudon later appeared in the anime series, it was much closer to its correct size.

20. On the DVD cover of Jirachi: Wish Maker, a normal Groudon is depicted, despite the Groudon in the film not being an actual Groudon.

21. In Pokémon XD: Gale of Darkness, the character Chobin operates a Robo Groudon after the player defeats him for the third time.

22. Although Groudon is genderless in the core series games, it is referred to as a male in Pokémon Mystery Dungeon: Explorers of Time and Explorers of Darkness.

23. A Groudon costume is worn by Terrell in Pokémon Battle Revolution.

24. Groudon may be modeled after the Earth’s land and volcanoes and may be a personification of the land. Its conflict with Kyogre is similar to that of Behemoth and Leviathan of Hebrew legend, who at the end of time would start a battle that would kill them both.

25. Like Groudon, Behemoth is associated with the land. However, while Behemoth is usually depicted as a warthog/hippopotamus-like creature, Groudon resembles a therapod dinosaur (namely a Tyrannosaurus), with spikes resembling various species of Ankylosauria.

26. In Jirachi: Wish Maker, a former Team Magma scientist named Butler, working as a magician at the Millennium Festival, wished to use Jirachi to bring forth a Groudon. However, what he ended up with was not a Groudon, but a manifestation of pure evil that had the appearance of a Groudon. At the end, Jirachi used Doom Desire to destroy the false Groudon.

27. Groudon made its physical main series debut in Gaining Groudon. Team Aqua had captured Groudon but did not have the correct orb to control it, so they planned to make a trade with Team Magma, who had captured Kyogre. The trade was about to be made when Archie decided to use Kyogre to destroy everyone, including his fellow henchmen. The battle between Kyogre and Groudon occurred in The Scuffle of Legends.

28. A Groudon made a cameo appearance in Mega Evolution Special II, where it was shown being awakened by the presence of the Giant Rock. It played a bigger role in Mega Evolution Special III, where it was shown in its primal state.

29. A Groudon appeared in Malice In Wonderland! as an illusion created by Mismagius.

30. A Groudon briefly appeared in the beginning of Hoopa and the Clash of Ages, being one of the many Pokémon summoned by Hoopa to defeat in the past. A Primal Groudon later appeared as one of six Legendary Pokémon summoned and hypnotized by the shadow Hoopa Unbound as its reinforcements. It and its teammates engaged in a battle against the Latios, Latias, and Shiny Rayquaza summoned to protect the real Hoopa in Dahara City. Eventually, after the shadow Hoopa was sealed in a Prison Bottle, the hypnosis on Primal Groudon and the other Legendary Pokémon was lifted, and Primal Groudon departed for its home.