One interesting Danny Phantom Pokemon fanfiction is 'Danny and the Pokemon World'. In this story, Danny somehow gets transported to the Pokemon world and has to figure out how to get back home while also dealing with the unique challenges of the Pokemon universe. It has some great action scenes where Danny uses his ghost powers in combination with Pokemon battles.
You could write about a group of trainers who are on a quest to find a phantom pokemon that is said to be able to bring back lost memories. They face many challenges and spooky encounters along the way.
It could be unique due to its writing style. Tehriah Phantom might have a very descriptive and engaging way of writing. They could bring out emotions in the story that are different from the norm in Pokemon fanfiction. Also, the setting of the stories within the Pokemon universe could be distinct, perhaps exploring areas or concepts that are not often used in other fan works.
It's interesting because it allows for a lot of creativity. Writers can come up with all sorts of crossovers. They can create new Pokemon species that are related to the elements of Danny Phantom, like a Pokemon that can phase through walls like Danny. Or they can write about how Danny would train his Pokemon differently due to his own experiences. There are endless possibilities for unique storylines and character developments in Danny Phantom Pokemon fanfiction.
Maybe in this crossover, some Pokemon are accidentally sent to Danny's world. Danny has to protect the Pokemon from being captured by the Guys in White while also trying to find a way to send them back. Meanwhile, a certain Pokemon, like Gengar, forms a special bond with Danny because of their shared ghostly nature.
Perhaps an organization made up of both Pokemon world villains and some of Danny's foes. They could be working together to create a portal that would merge the two worlds in a way that benefits them. They would be the main antagonists as they cause all kinds of chaos, stealing both Pokemon and technology from both worlds to achieve their goals.
A unique plot could start with a phantom pokemon being the only one of its kind left. The main character has to protect it from poachers who want to sell its rare abilities on the black market.
One possible plot could be that Danny Phantom, while exploring some sort of interdimensional rift, gets zapped by a strange energy that transforms him into a Pokemon. Maybe he becomes a Pikachu. He then has to figure out how to use his new Pokemon abilities to get back to his normal form. He might start by trying to communicate with other Pokemon, learning their ways and using his ghostly knowledge to his advantage in the Pokemon world.
Searching for good fanfiction can be a bit of a hunt. Since I don't know the exact content on LiveJournal Tehriah Phantom for Pokemon, start by looking at the tags related to Pokemon on LiveJournal. Check if Tehriah Phantom has a dedicated page or group. If there are reviews or comments on other Pokemon fanfiction, there could be mentions of this particular creator's work which can lead you to some great reads.
Let's say Danny turns into an Eevee. His adaptable nature would be taken to a new level. Eevee can evolve in many different ways, and Danny would likely be constantly thinking about his potential evolution. His personality would become more flexible, able to fit into different Pokemon groups easily. He would be more open to new experiences and relationships, and his inquisitive side would grow. He might start to see the world from a different perspective, as an Eevee has a different way of interacting with the environment compared to being a half - ghost.