One consequence could be a power imbalance. Naruto is extremely powerful, and his arrival might disrupt the existing power dynamics in the wizarding world. Another consequence could be cultural clash. The ninja way of life is very different from that of wizards. There might also be confusion as to how his abilities work within the magic - based system.
The consequences would be far - reaching. Naruto's summoning could expose the wizarding world to new forms of combat and energy manipulation. This could lead to a revolution in how magic is used. On a more personal level, characters like Hermione might be fascinated by Naruto's abilities and try to study them. But there could also be negative consequences. For example, if Voldemort got wind of Naruto's power, he would surely try to either recruit or destroy him, which would put Naruto and the Hogwarts crew in a very dangerous situation.
On one hand, it could bring new opportunities. Naruto's positive attitude and his skills in combat and friendship - building might inspire the wizards. But on the other hand, the Kyuubi's power is not easy to control. If it goes out of hand, it could cause destruction to the wizarding infrastructure and endanger the lives of many. Also, the magical creatures in the wizarding world might react unpredictably to this new, powerful being.
It's a wild concept. Naruto is from a world where physical combat and chakra control are key, while Harry Potter's world is centered around magic. If summoned, Naruto could be seen as an otherworldly being. His presence could create chaos as the wizarding world tries to figure out how to deal with him. He might start challenging the dark wizards using his own brand of justice.
Well, he'd probably use his magic in some unique ways combined with ninja skills. For example, he could use the Disillusionment Charm while sneaking around like a ninja. His broomstick flying skills might translate into some kind of super - fast ninja movement across rooftops.
In some fanfiction, it could lead to chaos. The toads might overrun Hogwarts if he can't control the summoning. It would be a funny sight to see the hallways filled with toads!
One consequence could be that the demon attacks him. Since demons are often portrayed as malevolent, a wrong summoning could lead to the demon turning on Harry and trying to harm him physically or magically.
One consequence could be a huge power boost. Naruto would become extremely strong, which might change the power balance in the fanfiction world. Enemies would be more cautious of him, and allies might rely on him more. Another consequence could be the internal struggle. The Kyuubi has its own will, so Naruto might have to constantly fight to maintain control when it's summoned.
Well, he would lose his human form and all the abilities that come with it. He would have to learn to move and hunt as a basilisk, which would be a huge adjustment. His friends might not recognize him and could even be afraid of him.
One consequence could be that the Joker's followers would be out for revenge. They might target Harry Potter or his friends if they also exist in that fanfiction world. Another consequence could be that the balance of power in the Joker's world is completely disrupted. There could be a power vacuum that other villains or even some anti - heroes might try to fill.
One consequence could be a major shift in the power balance in the wizarding world. With the Avengers' help, Harry might be able to quickly defeat Voldemort and his Death Eaters, which would change the whole political and social structure of the wizarding community. There would be less destruction and fewer casualties perhaps.
One consequence could be a major shift in the wizarding world's perception of good and evil. If Harry saves the Death Eaters, people would have to re - evaluate what it means to be a 'bad' wizard. There would be a lot of distrust at first, but over time, it could lead to a more forgiving society.