One popular trope is the 'bound by destiny' idea. For example, two characters who are from different backgrounds in the Star Wars universe are fated to be together and their journey towards realizing that destiny. Another is the 'bound by a common cause' trope, where characters are forced to work together despite their differences, like a Jedi and a Sith bound by the need to stop a greater evil.
Well, time - travel is a big one in Star Wars fanfiction. Writers like to play with the idea of characters going back in time to change certain events. There's also the 'hidden Jedi' trope, where a character discovers they have Jedi powers that were previously unknown. And of course, the 'enemies - to - lovers' trope between characters from the light side and the dark side.
One popular trope is the 'hidden Jedi' or 'force - sensitive outcast'. It often involves a character who discovers they have Jedi powers late in life or in unexpected circumstances. Another is the 'enemies - to - lovers' trope, like a Sith and a Jedi falling in love.
One popular trope is the 'fish out of water' story. For example, a Star Wars character like Luke Skywalker could end up in the Sailor Moon world and have to adapt to the very different environment and magic system. Another is the 'power - up' trope. A Sailor Scout might gain new powers inspired by Star Wars technology or the Force.
In Star Wars Green Lantern fanfiction, a common trope is the 'culture clash'. The Green Lantern Corps has its own set of values and rules, and when they interact with the cultures in the Star Wars universe, it can lead to interesting situations. For instance, the strict code of the Jedi might be compared to the oaths of the Green Lanterns. Another popular trope is the 'mystery object' trope. A Green Lantern ring might be a mysterious object in the Star Wars universe, and characters are trying to figure out its power and origin. Also, the 'training' trope can be seen, where a Star Wars character is trained to use the Green Lantern ring or vice versa.
One popular trope is the 'Lost Creature' where the OC is a species thought to be extinct but is rediscovered. For example, a small, furry creature that was wiped out by the Empire but somehow survived on a hidden moon. Another is the 'Mysterious Ally' where the creature OC has some special power or knowledge that helps the heroes. It might be a telepathic ability or knowledge of an ancient Jedi temple. The 'Cursed Creature' is also common, like a creature that was experimented on by the Sith and now has a dark side to it.
One popular trope is the 'outsider' trope. In this case, the 'beauty' character from Beauty and the Beast, often a human or a more 'civilized' being, is an outsider in the Star Wars universe. For example, if Belle was in the Star Wars galaxy, she might be seen as strange by the various alien species. Another trope is the'redemption' trope. Similar to how the Beast is redeemed in the original story, a Sith or a 'bad' character in Star Wars can be redeemed through the love or influence of the 'beauty' character.
One popular trope could be the 'forbidden love' between characters from different backgrounds or allegiances. For instance, a rebel and an imperial agent falling in love. Another might be the 'reunion' trope where two characters who have been separated for a long time finally come together in a passionate encounter.
One popular trope is the 'fish out of water' where Buffy is suddenly in the Star Wars universe and has to adapt. For example, in many stories, she struggles to understand the concept of the Force at first. Another is the 'power - up' trope where Buffy gains new powers related to the Force or Star Wars technology. She might become an amazing lightsaber wielder or be able to use some unique Force ability.
In Star Wars Avengers fanfiction, the 'hidden - heritage' trope can be seen often. Maybe a character discovers they have a connection to the other universe in their family history. The 'redemption' trope is also popular. A villain from one universe might find redemption by helping the heroes of the other universe. And let's not forget the 'love - across - universes' trope, where characters from Star Wars and Avengers fall in love despite their different origins.
One popular trope is Loki as a 'fish out of water' in the Star Wars universe. He's used to the world of Asgard and suddenly finds himself in a completely different setting with different rules and species. It leads to a lot of comical and interesting situations.