Some fanfics focus on the backstory of the changelings. They might delve into how the changelings came to be, their society's structure, and the role of the Queen. A well - written one could really bring a new perspective to the changelings in the MLP universe.
One interesting MLP Hellsing fanfic could be 'A Dark Alliance'. It might explore how the worlds of My Little Pony and Hellsing collide, perhaps with some of the ponies having to face the dark forces from Hellsing in their otherwise colorful and peaceful world.
A great Spitfire MLP fanfic could be one where she has to lead the Wonderbolts through a difficult situation, like a natural disaster that affects their performance area. She would have to use her leadership skills to keep the team together and find solutions. There are also fanfics that might show her in a more relaxed setting, outside of her Wonderbolt duties, interacting with regular ponies in Ponyville and having some fun adventures.
One interesting MLP slime fanfic could be 'The Slimey Adventure in Equestria'. It might involve ponies encountering strange slime creatures and having to figure out how to coexist or deal with the slime's unique properties.
One interesting werewolf MLP fanfic could be 'The Werewolf in Ponyville'. It might explore how a werewolf character interacts with the ponies in the MLP world. Maybe there are challenges and friendships formed that are unique to this combination of werewolf and pony elements.
One interesting MLP Twist fanfic could be 'Twist's Adventure'. It might show Twist getting involved in a magical quest in Equestria, facing challenges and making new friends along the way.
Some MLP reaction fanfics focus on the ponies reacting to a change in the seasons that is more extreme than usual. For instance, if winter comes with a massive blizzard, Applejack would be worried about the orchard but also determined to protect it. Rarity, on the other hand, might be initially concerned about how the cold will affect her fur and her fashion but then find creative ways to stay warm and stylish.
There could be a fanfic where Snowdrop discovers a hidden realm within Equestria. In this realm, she has to face challenges that test her courage and loyalty, and along the way, she forms unexpected alliances with other ponies. This type of fanfic would be full of mystery and excitement.
One interesting MLP Spyro fanfic could be 'The Adventure of Spyro in Equestria'. It might tell a story about how Spyro, with his unique abilities, interacts with the ponies in Equestria. Maybe he helps them solve a big problem like a mysterious magic malfunction that's affecting the land.
One interesting MLP Babycakes fanfic could be one where they go on an adventure in a magical forest. They might encounter strange creatures and have to use their friendship to overcome obstacles.
There are fanfics that focus on the character development in the context of an MLP - Gundam crossover. Imagine a Gundam pilot who is cold and stoic at first, but after spending time in Equestria and being influenced by the kind - hearted ponies, he starts to open up and show more emotions. This exploration of how different characters from two very different universes change when they interact can be a really engaging aspect of MLP Gundam fanfics.