Well, in my experience, Tumblr can also be a good source. There are many fanfic communities on Tumblr where users share and recommend their favorite Harry Potter - Twilight crossovers. Just search for relevant hashtags like #HarryPotterTwilightCrossoverFanfiction. However, the quality might vary more compared to dedicated fanfic platforms.
One great place to start looking for the best Harry Potter Avengers crossover fanfiction is on Archive of Our Own (AO3). It has a large collection of fan - created works, and you can search specifically for crossovers between these two universes. Just use the search function and filter for crossovers, and then look for ones with high ratings and lots of kudos.
Goodreads has some groups dedicated to fanfiction as well. Although it's mainly known for book reviews, these groups can be a hidden gem for finding Inuyasha - Twilight crossover fanfiction. You can also ask in anime or fantasy - related subreddits if anyone has any recommendations. Some users might be into this unique crossover and can point you in the right direction.
Archive of Our Own (AO3) is also a great place to find 'Best Twilight Crossover Fanfiction'. There are many talented writers on AO3 who create unique and interesting crossovers. You can browse through the Twilight section and look for crossovers with other fandoms you like.
One great place to find Harry Potter and DC Comics crossover fanfiction is on Archive of Our Own (AO3). There are many creative stories there. Some might have Harry Potter characters using magic in the DC universe, like Harry using spells against villains in Gotham. Others could involve DC heroes and villains in Hogwarts, perhaps Batman trying to solve a mystery within the castle walls.
The crossover is conceptualized by taking the core elements of both universes. Harry Potter's immortality could be a result of some dark magic he dabbled in, like the Horcruxes but with a different twist. In the Twilight world, the vampires are immortal in their own way. So, the fanfiction might explore how Harry's immortality, which is magical in nature, compares to that of the vampires. It could also look at how he might adapt to the new social structures in the Twilight world, like the vampire covens and the werewolf packs.
A great Harry Potter Twilight crossover fanfiction usually has well - developed characters from both universes. It's important that the authors capture the essence of Harry, Hermione, Edward, and Bella, etc. properly. For example, if Harry is written as too out of character, it can ruin the story.
Edward Cullen and Harry Potter are often popular. The contrast between Edward's vampire nature and Harry's wizardry makes for an interesting dynamic. Fans like to imagine how they would react to each other's powers and the situations they face.
Another option is to join CSI or Harry Potter fan communities on social media platforms like Reddit or Facebook. Fans in these groups might be able to recommend some great CSI and Harry Potter crossover fanfictions they've come across. For example, on Reddit, there are subreddits dedicated to both CSI shows and Harry Potter. You can post a request there, and fellow fans will likely be happy to share their favorites.
You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. Use the search function and type in relevant keywords like 'Eclipse Harry Potter Twilight crossover'. Check the ratings and reviews of the stories to see which ones are highly recommended.
There's also 'Link Potter and the Chamber of Secrets' which is a crossover with 'The Legend of Zelda'. It's really cool as it blends the two very different universes. The author manages to incorporate elements of Zelda like the Triforce and Link's abilities into the world of Hogwarts. It's full of exciting adventures and interesting interactions between the characters from both franchises.