Groudon is the legendary Pokémon personifying the land aligned with those with Souls of Silver, who is most famous for his emnity with Kyogre.
Groudon, being very old and very bored, is constantly looking for ways to entertain himself. To that end, he got into the habit of playing various games, including card games and videogames, the former he got into after a Groudon priest at the Mt. Pyre shrine talked about hanafuda cards while handling the Blue Orb. He can also be very serious, as shown when he explained about the Volcano Rites to Tagg and the others.
- Kyogre and Groudon don't get along, to the point that other legendaries joke about them actually showing Belligerent Sexual Tension towards each other.
- Tagg is considered one of his chosen, marked by the Blue Orb he holds.