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.
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 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'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.
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 possible consequence could be that Naruto's body takes a huge toll. Since Kurama is such a powerful entity, summoning him might drain Naruto's chakra to a dangerous level, leaving him vulnerable after the summon. In some fanfictions, he might even pass out immediately after Kurama is summoned.
In fanfiction, it could also attract unwanted attention. If Naruto summons Rashomon in a public place or during a battle, it might draw the eyes of even more powerful enemies or villains who would then target him specifically because they see him as a threat with this newfound ability. For example, some secret organizations might see him as a potential tool or a danger to their plans and start to plot against him.
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.