Mewtwo would be an extremely interesting Pokemon for Naruto to summon. Mewtwo is super powerful and has psychic abilities. Naruto could use Mewtwo's psychic powers to outwit his enemies or even to control the battlefield. It would also be fascinating to see how Naruto, with his kind heart, would interact with the complex and powerful Mewtwo.
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.
I think Charizard would be great. Naruto could ride on Charizard for fast travel and aerial combat. Its fire - breathing ability would be a powerful weapon against many enemies in the Naruto universe. Also, the bond between Naruto and Charizard could be developed in a similar way to how he bonds with his friends and summons in the original Naruto story.
Another aspect is the character development. Naruto having Pokemon summons can change his relationships with other characters. His friends might be both amazed and a bit jealous. And he has to learn how to be a good 'trainer' as well as a ninja. This adds new layers to his character as he adapts to this new ability and the responsibilities that come with it.
Well, in a Naruto can summon Pokemon fanfiction, it could work if there was some sort of cross - dimensional magic. Maybe Naruto discovers a hidden jutsu that allows him to open portals to the Pokemon world. Then he could start summoning Pokemon based on his chakra and willpower. For example, he might summon Pikachu if he needed a quick burst of electricity in a battle.
Naruto's character could develop a new sense of curiosity. Summoning Pokemon would expose him to a whole new world of creatures and powers. He might become more adaptable as he has to learn how to work with Pokemon, which have different personalities and abilities compared to the summons he's used to in his own world.
One of the most interesting demons could be a shape - shifting demon. This demon could change its form to deceive enemies or help Naruto in stealth missions. For example, it could transform into an exact replica of an enemy ninja to gather information. Another interesting demon might be a demon with the power of time manipulation. Naruto could use this demon's power to go back in time and prevent certain disasters from happening in the ninja world, like the attack on the Hidden Leaf Village by Pain.
One interesting storyline could be a young ninja who discovers a rare and powerful insect summon. For example, they might find a group of glowing beetles that can create illusions. The ninja then has to learn how to control and use these beetles in battles against other powerful foes in the Naruto universe.
There's also 'Pokemon in the Naruto World: Summoned'. In this fanfiction, Naruto discovers a strange jutsu that allows him to summon Pokemon. The story then delves into how he uses these Pokemon to his advantage against his enemies, and how the presence of Pokemon changes the dynamics of the Naruto universe. It has great character development for Naruto as he learns to work with his new Pokemon partners.
It could be fire - breathing dragons. Given Naruto's own energetic and passionate nature, fire - breathing dragons would be a fitting match. They could add a new level of destructive power to his arsenal.
I think Mewtwo would be the most fascinating for Naruto to talk to. Mewtwo is a very intelligent and powerful Pokemon. It has complex thoughts about its existence and purpose. Naruto, with his own struggles and growth in the ninja world, could have deep philosophical discussions with Mewtwo. They could exchange ideas about power, identity, and what it means to be different in their respective worlds.
A giant, hulking beast - type duel monster could also be very powerful. It might have incredible strength and endurance, able to take on multiple enemies at once. Its sheer physical presence could intimidate opponents, and it could use its brute force to smash through defenses and deal massive damage.
He could summon different kinds of tigers. Maybe there are snow tigers for cold environments. These tigers would be white - furred and well - adapted to snowy areas. They could be used in missions in the Land of Snow.