One main difference is the setting. The French novel is set in a more traditional European context, while Lupin III often has a more modern and sometimes Japanese - influenced setting. Another difference is in the supporting characters. Lupin III has a unique set of friends and foes that are different from those in the original French novel.
Adventure is also a prevalent theme. Since they are thieves in the Lupin III universe, they are often on exciting adventures in fanfics. Whether it's stealing a precious jewel or outwitting a powerful enemy, adventure is at the heart of many of these stories.
A recurring theme is the exploration of power. The Sailor Guardians have their powerful magic, while Lupin has his wits and thieving abilities. Fanfictions might explore how these different forms of power interact. Also, the theme of friendship and trust can be seen. Despite their differences, the characters from both series might develop a sense of friendship or at least mutual respect in the fanfictions. This can be a really interesting aspect as they come from such different backgrounds.
One common theme is the clash of different worlds. Lupin III comes from a more action - adventure, crime - centered world, while Sailor Moon is a magical girl universe. Fanfictions often explore how these two different settings interact. Another theme is the idea of unlikely alliances. Lupin and his crew teaming up with the Sailor Scouts against a greater evil.
In Lupin III crossover fanfiction, a popular concept is Lupin crossing over with characters from the world of steampunk. He could be in a Victorian - era inspired world filled with gears and steam - powered machines, teaming up or competing with steampunk heroes or villains. Another concept is a crossover with time - traveling characters. Lupin could find himself in different historical periods, interacting with various historical figures while still trying to pull off his heists. Additionally, a crossover with magical girl characters would be quite unique. Lupin might be bewildered by the magic and the cutesy yet powerful girls, and the story could involve him either helping or hindering their magical quests.
One common theme is the clash of different worlds. Cowboy Bebop has a more gritty, space - faring world while Lupin III is more about heists on Earth. So when they cross over, there's often a theme of how these different environments and cultures collide. Another theme is the idea of honor among thieves. Both shows have characters that operate outside the law but have their own moral codes. In crossovers, this often comes up when they have to decide whether to trust each other or not. And of course, adventure is a big theme. The characters are always getting into exciting situations, whether it's chasing bounties in Cowboy Bebop or stealing treasures in Lupin III.
In Lupin III crossover fanfiction, one of the most common characters paired with Lupin is Jigen Daisuke. Since they are partners in the original series, it makes sense for them to be together in crossovers. Additionally, Goemon Ishikawa XIII is also frequently paired with Lupin. Their different skillsets - Lupin's thieving and Goemon's swordsmanship - can create interesting dynamics in crossovers. And sometimes, characters from other detective or heist - themed shows like Danny Ocean from the Ocean's series might be paired with Lupin for a more modern and different kind of crossover.