Power struggle is a likely theme. Godzilla and Destoroyah are both extremely powerful, and a fanfic could explore who is truly the stronger one.
Survival could be another theme. If the story is set in a world where these two are the dominant forces, other beings in that world would be fighting for their own survival.
A 'godzilla x destoroyah fanfic' could potentially explore an alternate universe where Godzilla and Destoroyah interact in unique ways. It might focus on their battles, with detailed descriptions of their attacks and defenses. For example, it could show Godzilla's atomic breath clashing with Destoroyah's energy beams.
In a Mothra x Destoroyah fanfic, a possible plot is that a group of humans discover a way to manipulate both kaiju. They try to use Mothra and Destoroyah as weapons in a war against other countries. However, Mothra and Destoroyah resist and end up joining forces against the humans who are trying to control them. This would show a different side of their relationship, not just as enemies but also as beings that can unite against a common foe.
A common theme is power dynamics. Given that both Godzilla and Kong are extremely powerful, fanfics often explore who is stronger in different situations. Another theme is friendship or rivalry. Some fanfics focus on them becoming friends, while others emphasize their rivalry.
Another theme is the relationship between good and evil. Godzilla is often seen as a protector, while Ghidorah is more of a destroyer. Fanfics may play around with this perception, showing that there could be more to their natures. In some, they might even switch roles to some extent. This theme makes the stories more thought - provoking.
One common theme is cooperation. Since they are both powerful creatures, in fanfics they often have to work together against greater threats like alien invaders or some super - powerful ancient monsters.
One possible theme could be survival. Given their nature as giant monsters, they might be fighting for survival in a world that is constantly changing. Another could be power dynamics, as Godzilla and the Female Muto have different levels of strength and abilities.
In a Mothra x Destoroyah fanfic, the story could start with Destoroyah causing chaos in a major city. Mothra senses the danger and comes to the rescue. Their first encounter could be a brief skirmish where they test each other's strength. As the story progresses, the author might delve into the mythology behind both kaiju. For example, Mothra's role as a protector of the Earth and Destoroyah's origin as a more destructive force. This could lead to a complex plot where Mothra tries to find a way to either defeat Destoroyah or find a way for them to coexist.
One possible plotline could be that Shimo has some sort of special power that can either help or hinder Godzilla. For example, Shimo might be able to communicate with Godzilla in a way no one else can.
A possible plot could be that Indominus Rex somehow gets teleported into Godzilla's world. Confused and angry, it starts attacking everything in sight. Godzilla, seeing this new threat, decides to take it on. Their battle could cause massive destruction, but in the end, they might reach a truce when they both realize there are bigger threats out there.
One main theme is the clash of different powers. Godzilla has his atomic - based powers which are so different from the semblances and combat skills in RWBY. So, the fanfic often explores how these different power systems interact.