The 'hidden - identity' trope can be used. A Sailor Scout could be hiding her true identity while interacting with Star Wars characters, or vice versa. For example, a Jedi could be undercover in the Sailor Moon world, and the mystery around their true purpose and abilities can drive the plot forward in the fanfiction.
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.
Well, in Sailor Moon x Reader fanfiction, a common trope is the transformation. The reader often discovers their own powers and goes through a cool transformation sequence, similar to the Sailor Scouts. Also, the 'Secret Identity' trope is popular. The reader might have a secret identity that they have to keep from the other characters while still being part of the group. And of course, the 'Power Struggle' trope, where the reader has to deal with their newfound powers and the responsibilities that come with them.
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 'Force - Bond' where two characters, often a Jedi and another, are connected through the Force in a special way. Another is the 'Hidden Jedi' trope, where a character discovers they have Jedi abilities later in life. 'Time - Travel' is also quite common, with characters going back or forward in time in the Star Wars universe.
One popular trope is the 'fish - out - of - water' scenario. For example, a Star Wars character might find themselves in the Avatar world and have to adapt to the different cultures and bending abilities. Another is the 'power - exchange' trope. This could be a Jedi learning bending or an Avatar character getting a taste of the Force. There's also the 'team - up' trope, where characters from both universes join forces to fight a common enemy, like a Sith Lord and a powerful Fire Nation bender working together.
A common trope is the 'fish - out - of - water' story. For example, a Star Wars character like Han Solo finding himself in Equestria and having to adapt to the very different world of ponies. Another popular one is the 'power transfer' trope. This could be a pony getting some of the Force's power or a Jedi getting a boost from pony magic. There's also the 'team - up' trope where characters from both universes join forces to fight a common enemy, like Darth Vader and an evil pony overlord.
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 '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.
In fem Harry Potter and Sailor Moon fanfiction, a common trope is the friendship - building aspect. The characters from both series have to learn to trust and work together. This often involves some initial misunderstandings and then a deepening of their relationships. Also, the 'hidden identity' trope is quite popular. Maybe fem Harry has to keep her wizarding identity a secret in the Sailor Moon world or vice versa.
A great way to blend them is in terms of themes. Both Sailor Moon and Star Wars deal with good vs. evil. In a fanfiction, the Sailor Scouts could team up with the Rebel Alliance. They could share their knowledge and skills. The Scouts' transformation sequences could be adapted to fit in the Star Wars universe, perhaps as a new form of battle preparation that amazes the Star Wars characters.
One popular trope is the 'Chosen One' concept. The OC is often seen as the one who will bring balance to the Force, just like Anakin was supposed to. Another is the 'Outcast Jedi'. They don't fit in with the traditional Jedi ways and are often misunderstood. For example, they might use the Force in ways that are frowned upon by the Council. And the 'Secret Heritage' trope is also common. The OC discovers they have a special bloodline or connection that gives them extra powers or a special mission.