One common theme is culture shock. RWBY characters are from a very different world, so when they come to Earth, they're amazed by things like the variety of foods and different forms of entertainment. Another theme is adaptation. They have to learn new skills to survive on Earth, like using modern technology.
Many RWBY Earth fanfics have the theme of heroism. The RWBY characters bring their heroic natures to Earth. They might fight against local villains or help in natural disasters. And there's also the theme of identity. As they interact with Earth, they start to question and re - define who they are in this new context.
One common theme is culture shock. The OC from Earth is suddenly in a very different world, like Remnant in RWBY. They have to deal with new customs, technology, and ways of fighting. Another theme is the idea of bringing something new. The OC often has skills or knowledge from Earth that can be useful or cause trouble in RWBY's world.
One common theme is friendship. Since CRDL is a team, many fanfics explore how the members interact and support each other as friends. Another theme is growth. The characters are often shown developing their skills and personalities over time.
Power dynamics could also be a theme. Deathstroke is a very powerful and experienced fighter. In 'rwby deathstroke fanfic', the RWBY characters might initially be at a disadvantage against him. So, the fanfic could focus on how they overcome this power gap, whether through strategy, newfound abilities, or teamwork. It can also explore how Deathstroke views the RWBY characters' powers and how he adapts to fight them.
One common theme is the distortion of the familiar RWBY settings. For example, Beacon Academy, which is usually a place of learning and growth, can be turned into a haunted and dangerous place. Another theme is the corruption of the characters' powers. Their abilities might be twisted in a way that becomes a source of horror rather than strength. And the threat of the unknown, like strange creatures or forces emerging from the uncharted parts of Remnant.
Love and commitment are very common themes. These fanfics often focus on how the characters have grown to deeply love each other and are willing to make a lifetime commitment through marriage. For example, in many of them, you can see the characters going through challenges that test their love and still coming out stronger.
Character growth is another theme. As the RWBY characters experience new situations in the WoW universe, they develop and change. They learn new skills, make new friends or enemies, and gain a deeper understanding of themselves and the world around them, just like in their own RWBY world but in a different context.
The theme of heroism is common in oscar rwby fanfic. Oscar is on his way to becoming a hero. Another is the theme of mystery. There are often elements of mystery surrounding Oscar's past or his abilities. And the theme of teamwork is also prevalent as he works with the RWBY team to achieve common goals.
Overcoming differences is another theme. Since the two universes have distinct cultures, abilities, and species, fanfics often show how characters learn to accept and work with those differences. This could be a human from RWBY learning about the dragons in HTTYD or vice versa.
Since I'm not very familiar with specific RWBY Skunk fanfics, but generally in RWBY fanfics, common themes can include adventure, friendship, and the fight against evil. For the 'Skunk' aspect, it might be related to a unique character or a special ability. Maybe it's about a character with skunk - like features having to overcome prejudice or use their unique trait to help the team in some way.
Another theme is adaptation. RWBY characters are used to their own world, and when thrown into the Fallout world, they need to adapt to new technologies, cultures, and threats. This creates a lot of interesting character development and story arcs. For example, Ruby might have to learn how to use a Pip - Boy or deal with the different types of mutants in Fallout.