Darkrai's power of inducing nightmares could be countered by Naruto's positive energy. Naruto's ability to inspire and his strong will could disrupt Darkrai's dark influence. For example, if Darkrai tries to put Naruto in a nightmare, Naruto's memories of his friends and his determination to protect them could break through the nightmare.
The clash of two different universes makes it interesting. Naruto has its ninja world full of jutsus and complex characters, while Darkrai is a mysterious Pokémon. Combining them can lead to unique storylines, like Naruto having to deal with Darkrai's nightmares or using his ninja skills to catch it.
I'm not sure of a specific 'naruto darkrai starter fanfic' off the top of my head. You could try searching on fanfiction websites like FanFiction.net or Archive of Our Own. They have a vast collection of fan - made stories, and you might find something related to Naruto and Darkrai there.
One idea could be that Darkrai enters the Naruto universe during a major battle. Its dream - inducing powers start to affect both sides, causing chaos. Ninja start to see their worst nightmares, and it becomes a race for Naruto and his friends to figure out how to stop Darkrai and wake everyone up from the nightmarish state.
The fanfic might explore the relationship between Darkrai and Alice. It could be about their adventures together in the Pokemon world. Maybe Darkrai, being a mysterious and often misunderstood Pokemon, forms a special bond with Alice, and they face various challenges.
Well, from an ethical point of view, it can be a bit of a gray area. On one hand, in the realm of fanfiction, it's a form of creative expression. But when it involves a 'human' and a Pokemon like Darkrai, it might seem a bit odd. Some people might argue that as long as it doesn't promote harm or inappropriate behavior, it can be okay. However, others may think it blurs the lines between the fictional and real - world concepts of relationships.
A Darkrai x Cresselia fanfic would likely be full of dreamy landscapes and surreal encounters. Since Darkrai can manipulate nightmares, there could be some really dark and spooky scenes. Cresselia, on the other hand, would bring a touch of light and hope. Maybe the fanfic will show how their powers interact when they are in close proximity. It could also be a love story of sorts, with their differences being what attracts them to each other in the end, defying the expectations of their natural opposition in the Pokémon lore.
For a more unique take, including Jiraiya could be great. His pervy but knowledgeable personality could lead to some humorous and yet useful moments. He might have some ancient knowledge about the connection between the Naruto world and the Pokémon world where Darkrai comes from. On the Pokémon side, Cynthia could be a great addition. As one of the strongest Pokémon trainers, she could offer a different perspective on Darkrai and also help in battles against any enemies that might be using Darkrai's power for evil.
Friendship or love is also a common theme. Many 'cresselia x darkrai fanfic' explore how they develop feelings for each other. It could start as a simple friendship based on mutual respect and understanding of their powers, and then grow into something deeper. For example, in some fanfics, they protect each other from threats, which strengthens their bond and leads to a romantic relationship over time.
One possible storyline could be a battle for control of the dream world. Darkrai might be trying to expand his influence of nightmares, and Cresselia has to stop him. But as they clash, they start to understand each other's perspectives. Another storyline could be that a third, more powerful force is threatening both of them and their respective domains, so they are forced to work together. This could lead to a begrudging respect that turns into friendship or more.