Sure. You can try FanFiction.net as well. There are stories that might have characters from Harry Potter using Keyblades in a world influenced by Twilight. However, the quality can vary greatly. It's best to read the reviews and summaries before diving into a story. Sometimes, you might come across a really creative piece that makes the most unexpected and exciting combinations of these three elements.
Yes, there are quite a few. You can start by looking on fanfiction websites like Archive of Our Own. There, you'll find a variety of stories that blend the elements of Harry Potter, Twilight, and Keyblade from Kingdom Hearts. Some might focus on a crossover adventure where characters from different universes interact, while others could explore unique magic systems created by combining the concepts of all three.
Definitely. There are fanfictions out there. A lot of times, these crossovers are written by fans who are really passionate about all three franchises. They might create a story where a wizard from Harry Potter discovers the power of Keyblades and gets involved in the vampire - werewolf drama of Twilight. It's a great way to explore new and imaginative scenarios that wouldn't exist in the original works.