The most interesting aspect is the clash of their two worlds. Timber from a more human - centric world and Twilight from Equestria. Their different ways of thinking and approaching problems make for engaging stories. For example, Twilight's magic - based solutions might seem strange to Timber at first, and vice versa. This creates a great dynamic for the plot.
One plot idea could be them going on an adventure together to discover a new type of magic in Equestria. Another could be Timber helping Twilight with a difficult spell she's been trying to master.
One popular Timber Spruce and Twilight Sparkle fanfiction is 'The Meeting of Two Worlds'. It beautifully weaves their different personalities together in an adventure. Another great one could be 'Spruce and Sparkle's Friendship Quest' which focuses on how they build a strong bond in a magical land filled with challenges. And there's also 'Twilight and Timber: A New Alliance' that shows them teaming up against a common enemy in a really exciting way.
Finding fanfiction about Twilight Sparkle and Timber Spruce can be a bit of a hunt. You could start by looking at Tumblr. There are many MLP fans on Tumblr who create and share fan content, including fanfictions. Also, keep an eye on YouTube. Some YouTubers might review or recommend fanfictions in the MLP fandom, which could lead you to ones about Twilight and Timber.
A fanfiction could explore a scenario where Twilight invites Timber Spruce to her world in Ponyville. He gets to experience all the unique aspects of Equestria, like the different pony tribes and their cultures, and in the process, they develop a deeper friendship.
Begin with a strong opening scene that grabs the reader's attention. It could be a dramatic moment like Twilight getting into trouble and Timber Spruce coming to her rescue. Then, start to build the plot gradually, introducing conflicts and challenges that they have to overcome together, such as dealing with an evil force that wants to disrupt the harmony between their two worlds.
Well, often in 'insane twilight sparkle fanfiction', the plot twists can be really engaging. The author might take the concept of Twilight's intelligence and turn it into something that causes chaos. Maybe she discovers a new type of magic that drives her a bit mad and the story follows how she and her friends deal with this new Twilight. It can be a really fresh take on the My Little Pony universe.
One interesting aspect could be the different interpretations of Twilight Sparkle's character. In fanfiction, she might be placed in various new situations, like exploring a new magical realm that wasn't shown in the original series. This allows fans to see how she would react and grow in these unique circumstances.
There might be a fanfiction where the relationship between certain characters is explored in a deeper way. For example, how their friendship grows stronger through difficult times. In these stories, we can see the characters' personalities develop further, which is really engaging.
You can try looking on popular fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Flash Sentry x Timber Spruce' on their search bars.
One common theme could be friendship. They might start as friends and then develop deeper feelings over time.