Definitely Pikachu. Since Naruto is often in need of a quick and agile ally, Pikachu's speed and electric attacks would be very useful. Plus, Pikachu's cute appearance but powerful abilities would create an interesting contrast with Naruto's ninja style.
Naruto would probably choose a Pikachu first. Pikachu is energetic and has a lot of spunk, just like Naruto. They would both be full of enthusiasm and would make a great team right from the start.
A common trope is the idea of the Pokemon having chakra. This allows for some interesting interactions between the Naruto and Pokemon universes. Also, there's the trope of Pokemon trainers from the Pokemon world ending up in the Naruto world and having to adapt to its ways. They might end up in a ninja village and have to learn about ninjas and their skills. Sometimes, there are crossovers where legendary Pokemon play a big role in Naruto - related events, like helping to defeat a powerful enemy in the Naruto world.
I think Bulbasaur would be a good match. Naruto has a strong connection to nature in his own world, and Bulbasaur is a nature - based Pokemon. Naruto could use his knowledge of plants from his ninja training to help Bulbasaur grow stronger.
In a fanfiction where Naruto becomes a Pokemon Trainer, he would bring a whole new dynamic to the Pokemon world. Naruto is used to facing tough opponents in the ninja world, and he would apply that experience in the Pokemon battles. He would be fearless in exploring new areas to find rare Pokemon. His loud and energetic personality would attract a diverse range of Pokemon. His training methods might be unorthodox, but they would likely be effective. For instance, he could use his shadow clone jutsu to train multiple Pokemon at once, just like how he uses it for his own training in the ninja world.
Well, it could be about Naruto in a world where he becomes a Pokemon master. Maybe he uses his ninja skills along with Pokemon training. For example, his speed and stealth as a ninja could help him catch rare Pokemon. He might also use his jutsu in Pokemon battles in some creative ways.
Well, in a 'Naruto is a Pokemon fanfiction', it could be really interesting. Naruto could befriend Pikachu and they could go on adventures together. He could use his chakra control to help him bond better with Pokemon. And perhaps he would enter Pokemon battles using a combination of his ninjutsu and the Pokemon's attacks. It could also show how Naruto's values from his own world would influence the way he interacts with the Pokemon universe.
One plotline could be Naruto starts in his own world, discovers a portal to the Pokemon world, and decides to explore it. He might start as a novice Pokemon trainer and quickly rise in the ranks using his ninja skills.
Well - developed characters are key. When the author can blend the personalities of Naruto characters with the charm of Pokemon, it works great. Like if Sasuke has a cool, powerful Pokemon partner that reflects his own personality. Also, a good plot that has a balance of action, adventure, and character growth is essential. It should keep readers interested from start to finish.
Well, 'naruto guardian of pokemon fanfiction' might be a creative blend of the Naruto universe and the Pokémon universe. In this fanfiction, Naruto could be brought into the Pokémon world and take on the role of a guardian. He might use his chakra and combat abilities to safeguard Pokémon habitats or individual Pokémon from villains who want to use them for evil purposes. For example, he could use his shadow clone jutsu to patrol large areas and keep an eye out for any signs of trouble. Also, his strong sense of justice would make him a great protector for the Pokémon.