Yes, there are! For example, there could be a story where the strategic minds in Young Justice are faced with the otherworldly threats that Hellboy usually deals with. It's interesting to see how the young heroes would adapt to the darker and more supernatural elements of Hellboy's world. Check fanfiction.net as well for a wider range of such stories.
Definitely. A lot of these fanfictions play with the idea of the different moral compasses in both universes. In Young Justice, the heroes are more about justice in a traditional superhero sense, while Hellboy has his own unique take on good and evil. Fanfictions might explore how they reconcile their differences when they meet. You can also search for them on Wattpad, which has a growing collection of such crossover works.
One great Young Justice Warhammer fanfiction is 'Young Justice in the Grim Darkness of the 41st Millennium'. It combines the characters from Young Justice and drops them into the Warhammer 40K universe. The story does an amazing job of showing how the Young Justice team adapts to the brutal and unforgiving nature of the Warhammer world.
One great 'Young Justice Female Superboy Fanfiction' is 'Superboy's New Ally'. It's about a female character who has unique powers and becomes Superboy's partner. The story focuses on their adventures together and how their relationship develops.
There's also a fanfic called 'Miss Martian's New Path'. In this one, she has to face a new enemy that targets her specifically because of her Martian heritage. It's full of action and also some really touching moments as she leans on her friends in the Young Justice team for support.
In the realm of Young Justice and Batman Beyond fanfiction, 'The Next Generation of Heroes' is a popular one. It delves deep into how the legacy of Batman in the future (as seen in Batman Beyond) impacts the new generation of heroes in Young Justice. It has complex relationships between characters, and the writing really brings out the best in both universes, making it a must - read for fans of both.
The best place to start is Archive of Our Own. It has a great tagging system. Just search for 'Young Justice' and 'Hellboy' and you'll get a list of relevant fanfictions. You can then sort them by popularity or date updated.
One great 'Sasuke Young Justice Fanfiction' is 'Sasuke in Young Justice: A New Alliance'. It has an interesting plot where Sasuke's skills blend well with the Young Justice team's dynamic. Another good one is 'Sasuke's Journey in Young Justice'. It focuses on how Sasuke adapts to a new world and new allies.
One great fanfic could be 'Fem Danny's New Team' where she teams up with the Young Justice crew in really interesting ways. It has a lot of action and great character interactions.
One great fanfic is 'The Female Percy in Young Justice's World'. It combines the elements of Percy Jackson's powers and the Young Justice universe really well. The female Percy is a strong character, facing challenges from both the demigod world and the superhero world in the story.
One great place to start is Archive of Our Own (AO3). There are numerous fanfictions there that explore the relationship between Zatanna and Nightwing. You can filter by tags like 'Young Justice', 'Zatanna', and 'Nightwing' to find the most relevant ones. Some fanfictions might focus on their adventures together as part of the Young Justice team, while others could delve into a potential romantic relationship between them.
A really cool 'Gaara Young Justice Fanfiction' is the one that focuses on a cross - over mission. Gaara teams up with the Young Justice team to face a common enemy. This story is full of action and the author does a great job of combining the different fighting styles and powers from both universes. It's exciting to see how Gaara's sand powers work in tandem with the abilities of the Young Justice members.