Another possibility is that it's a fanfic that delves into an alternate universe. In this universe, Chloe and Timmy are the only ones with fairy godparents left. They have to team up to protect the magic from being completely wiped out by some evil force. Along the way, they learn more about each other's strengths and weaknesses and how to work together effectively.
One magical element could be a new type of fairy dust. Maybe it has the power to make inanimate objects come to life and they have to figure out how to control it. For example, all the toys in Timmy's room suddenly start moving around and causing chaos.
A possible plot could be that Timmy's fairies accidentally send him to Gary's world. Gary is intrigued by Timmy's presence and the strange things that happen around him due to his fairy magic. They start to explore Gary's world together, and along the way, they face challenges like dealing with jealous classmates of Gary who don't like Timmy getting all the attention. In the end, they become good friends and Timmy manages to find his way back home with the help of Gary's intelligence.
Well, one possibility could be that Timmy's wish to experience life as a girl is granted by his fairy godparents. He might then have to navigate through the challenges of being a girl in his school and among his friends. For example, he could face different expectations in terms of appearance and behavior. He might also discover new aspects of friendship as a girl, like getting involved in different social circles or activities that are more common among girls in the Fairly Odd Parents universe.
One plot idea could be that Timmy Turner, with his fairy godparents, accidentally gets transported to Remy's world in the kitchen. Remy, being the curious rat, decides to help Timmy get back home while they have all sorts of adventures along the way, like avoiding the chef in the kitchen and learning about each other's worlds.
A Timmy and Remy fanfiction could be really interesting. It might start with Timmy and Remy meeting in some magical or strange situation, like in a new part of Dimmsdale that's full of mystery. They could go on adventures together, using Timmy's fairy godparents' magic in unexpected ways. Maybe they'd have to solve a problem that only their combined skills can handle, like saving the town from a new kind of villain who is immune to normal magic.
The different interpretations of their relationship. Writers can take their characters in new directions.
Well, it depends on what you consider 'good'. There are many 'The Fairly OddParents Timmy x Chloe' fanfics out there. Some might be more to your taste if you like a slow - burn type of relationship development. Others might focus on comical situations that arise from their pairing. You can start your search on popular fanfic websites and read the reviews to find ones that are well - received.
In this fanfiction, perhaps Timmy discovers a magical world of fairies. He might gain fairy powers like the ability to fly or cast spells. Maybe he'll meet other fairy characters and go on adventures with them, exploring enchanted forests and solving magical mysteries.
One possibility could be exploring how Chloe King deals with the challenges of pregnancy while still maintaining her normal life and any special abilities she has. Maybe she has to hide her pregnancy from some enemies who might see it as a weakness.
One possible plot could be that Ben Tennyson somehow ends up in the world of Fairy Tail. He could team up with Natsu and his friends to fight against a common enemy. Ben could use his alien forms to combat the dark magic threats that Fairy Tail often faces.