One possible plotline could be that the trainer is on a quest to find and capture Raikouf. Along the way, they face numerous obstacles like other powerful Pokémon or rival trainers. Another plot could be that the trainer already has Raikouf and they are training it to become the strongest in a certain competition, like a Pokémon league.
In a Trainer x Raikouf fanfic, there could be a plot where the trainer and Raikouf have a strained relationship at first. Maybe Raikouf is a wild and independent Pokémon that doesn't trust humans easily. But through various adventures and the trainer's perseverance, they gradually build a strong bond. Another possible plot is that Raikouf is part of a prophecy, and the trainer is the chosen one to guide Raikouf in fulfilling this prophecy. This could involve battles against dark forces, self - discovery for both the trainer and Raikouf, and a journey full of twists and turns.
A plotline might involve Raikouf being injured or lost, and the trainer has to go on a journey to rescue or find it. During this journey, the trainer discovers more about Raikouf's past and its unique abilities. Or perhaps there's a plot where Raikouf has some sort of special power that only the trainer can unlock, and they work together to master this power and use it to save their world from a great threat.
I'm not sure specifically about 'trainer x raikouf fanfic' as it might be a rather niche or specific one. You could try searching on fanfic platforms like Archive of Our Own or FanFiction.net. They have a vast collection of fanfictions, and you might be able to find what you're looking for by using relevant tags and keywords.
Perhaps in some fanfics, Pikachu and Sparky could be from different regions and they meet by chance. Their different backgrounds and abilities could lead to an interesting story as they learn from each other and overcome difficulties. For example, Sparky might be from a region with different types of electric - type Pokémon techniques that Pikachu has never seen before, and they could exchange knowledge. This could also lead to a deeper emotional connection between them as they grow to respect and care for one another.
Another plotline could involve Ben and Albedo being forced to team up against a greater threat. They would have to put aside their differences and work together, which could lead to some interesting character dynamics as they learn more about each other.
Perhaps in a fanfic, Pirika and Hao are both involved in a mystery. As they work together to solve it, they start to develop feelings for each other. They might discover secrets about each other along the way that either bring them closer or create some temporary rifts in their relationship.
A possible plotline could be that Naruto is transported to Maleficent's world. He might initially be seen as a threat but then prove himself to be an ally. Together, they could fight against the dark forces in Maleficent's world that are trying to take over the entire realm.
One possible plotline could be that Ariel and the urchin are from different worlds and they have to overcome various obstacles to be together. Maybe there are cultural differences between their species that they need to navigate.
Maybe in a 'naruto x cheetah fanfic', the cheetah is a spirit animal that Naruto encounters during a spiritual journey. The cheetah imparts some special wisdom or power to Naruto, which he then uses to face his enemies back in the real world. This could involve Naruto having to master this new power while also dealing with the politics of the ninja villages.
One possible plotline could be a story where Hinata and the Raikage meet during some diplomatic event between Konoha and Kumogakure. They initially have a misunderstanding but gradually start to understand and respect each other, leading to a romantic relationship.
One possible plotline could be that Naruto somehow ends up in Quinella's world. He might initially be confused but then use his ninja skills to navigate the new environment. Quinella could be intrigued by him and they form an unlikely alliance against a common enemy in her world.
In a 'naruto x lilith fanfic', a plotline could be that Lilith is a mysterious figure who has been observing the Naruto world for a long time. She finally reveals herself to Naruto and offers to train him in a new and powerful form of jutsu. As they train together, a bond forms between them, which could lead to various story developments, such as facing off against other powerful foes or dealing with the politics within the ninja villages.