You can start by looking on Archive of Our Own (AO3). It has a large collection of 'Raya and Namaari' fanfictions with different themes and styles. There are also some on Fanfiction.net, but AO3 generally has more diverse and high - quality works in this regard.
The British novel Tunnel can be purchased in major online bookstores or physical bookstores. In addition, the novel could also be read online through online reading platforms such as Amazon and Google Read.
Raya is purely fictional. It's made up to take us on an imaginative adventure in a fantasy world. The characters and events are not based on real-life occurrences.
I'm not sure where you can specifically find 'dark crystal ya novels'. You could try looking in specialized bookstores that focus on young adult or fantasy literature. Maybe check with the local independent bookstores as they often carry unique and hard - to - find titles.
Another option is to check out some Pokemon - focused forums. There are often sections where fans share their own fanfiction. You might need to do a bit more digging around, but you can find some unique and interesting Pokemon Crystal rival fanfiction there.
Some Pokemon - centered forums also have sections dedicated to fanfiction. For example, the Serebii.net forums might have some great Pokemon Crystal fanfiction. Members often share their own works or recommend stories they've read.
You can start by looking at popular fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Gold Crystal Pokémon' and you'll get a bunch of results. Some might be centered around the characters from the Gold and Crystal versions of the Pokémon games, like Ethan or Kris, and their adventures.
You can try websites like Archive of Our Own (AO3). It has a large collection of fanfictions on various topics, including those related to Crystal Gems. Another option could be FanFiction.net, which also hosts a wide range of fan - created stories.