One common theme is power. Since Groudon is a very powerful Pokemon, in fanfiction about the female Groudon, her power is often explored, like how she uses it or struggles with it. Another theme is identity. As a female in a world where male counterparts might be more prominent, she often has to figure out her own place and identity. For example, in some stories, she has to prove herself as a strong leader despite being a female Groudon.
One popular female Groudon fanfiction is 'The Ascent of the Female Groudon'. It focuses on a unique take where the female Groudon has special powers and goes on an adventure to save her territory. Another one could be 'Female Groudon: A New Era' which explores how a female Groudon changes the dynamics in the Pokemon world. There's also 'The Legend of Female Groudon' which delves into her backstory and her relationships with other Pokemon.
A great fanfiction idea could be a time - travel story involving Groudon and Kyogre. A trainer travels back in time to the era when Groudon and Kyogre first started their feud. The trainer tries to prevent the feud from ever starting, but in doing so, he accidentally disrupts the balance of nature in that time period, leading to new and unexpected challenges.
Well, it's the combination of two very iconic elements from the Pokémon world. Ash, the determined and often underestimated trainer, going up against the powerful and legendary Groudon. It could be interesting to see how the author portrays Ash's growth in the story. Maybe he has to overcome some personal doubts or face new challenges in order to catch Groudon. Also, the way the Pokémon world is described during the encounter, like the environment where they meet and the reactions of other Pokémon around, can add a lot of depth and interest to the fanfiction.
One common theme is the struggle between their opposing natures. Kyogre is a water - type and Groudon is a ground - type, so their elements are at odds. But in fanfiction, this can be a source of tension and attraction. Another theme could be the idea of them finding common ground despite their differences, perhaps to save the Pokemon world together.
For Kyogre, it could be characterized as a powerful but somewhat solitary being. It's protective of the oceans and views any threat to the seas as a direct attack. It's majestic and its movements are fluid like the waves. Groudon, on the other hand, is a force of the land. It's stubborn and proud, believing that the land is the most important part of the world. It's slow to trust but once it does, it's a loyal ally.
In a fanfic, Groudon can be seen as a proud and territorial being. Since it represents the land, it guards its territory fiercely. It has a sense of honor and dignity associated with its role as the keeper of the earth. Kyogre can be characterized as a wise and ancient entity. It has seen the ebb and flow of countless years beneath the ocean waves. It is patient but when provoked, it can call upon the power of the entire ocean to defend itself. They both can be shown as having a mutual respect for each other's power deep down, even though their natures often put them at odds.
Sure. There's a fanfiction where Groudon is summoned by a rogue ninja who wants to use its power to take over the ninja villages. Naruto discovers this and has to figure out how to stop the rogue ninja and send Groudon back. The unique part is that Naruto has to use his knowledge of both the ninja world and some ancient legends about Groudon that he stumbles upon.
You can try searching on fanfiction websites like FanFiction.net or Archive of Our Own. Just type in 'Ash Catches Groudon' in the search bar and browse through the results. There might be various stories with different takes on this scenario.
The theme of redemption can also be present. Maybe one of them has caused some kind of destruction in the past, and through their relationship with the other, they find a way to make amends. It could be Groudon's volcanic eruptions or Kyogre's tsunamis that they need to atone for, and their bond helps them in this journey of redemption.