On a personal level, Naruto would finally get the family he always wanted. But it might also bring some confusion and adjustment issues. His parents would be from a different time, and they'd need to adapt to the new world Naruto lives in. For example, they might be shocked by the new technology and the changes in ninja warfare.
One way could be through some powerful forbidden jutsu. Maybe he discovers a long - lost scroll that contains a jutsu specifically designed to bring back the dead. However, such a jutsu would likely come with a great cost, like sacrificing a large amount of his own chakra or even his life - force.
On a more magical level, reviving the dead is against the natural order of things in the wizarding world. This could attract unwanted attention from magical authorities or even dark forces. Some might see Harry's act as a dangerous precedent and try to either stop him or use his new - found power for their own evil purposes.
One consequence could be a change in the family dynamic. His mom would be back, and Naruto would finally have the family he always dreamed of. This might also have an impact on his relationship with his dad, as they would all be together again.
In some fanfictions, Harry might use extremely powerful and ancient magic. Maybe he discovers a long - lost spell during his adventures that has the power to reverse death. For example, he could find a spell hidden in a forgotten corner of the Hogwarts library that was created by a powerful wizard in the past but was deemed too dangerous to be used.
Perhaps in the fanfiction, Goku's love for his parents is so strong that it creates a new type of energy. This energy is noticed by a powerful and benevolent entity who offers Goku a deal. If Goku can prove that he will use his power for good and protect the universe even better with his parents alive, then he can revive them. Goku then has to go on a journey to show his worthiness, facing off against old and new enemies along the way.
It could be possible in fanfiction. Maybe Goku discovers a new type of wish - granting magic that is even more powerful than the Dragon Balls. Or perhaps he travels to a different dimension where time and death work differently. Fanfiction allows for creative interpretations. But in the official Dragon Ball story, there's no indication that such a thing could occur. The Saiyan race has its own limitations and the concept of death is pretty well - established in the series.
In some fanfictions, Naruto might use a powerful jutsu he discovers or masters. For example, he could find a forbidden jutsu that has the power to bring the dead back to life. Maybe it's a jutsu that requires a great sacrifice on his part, like giving up some of his own chakra permanently.
Well, in some fanfictions, Naruto might start by finding suitable partners within the village. Since he is the last of his clan, he could look for women who are willing to carry on the Uzumaki bloodline. He may also use his influence as a hero to encourage others to support his clan - revival efforts, like getting the village to provide resources for the new Uzumaki generation.
Emotionally, Naruto would have to deal with a whole new set of family relationships. He grew up without his parents, and now having them back would be a huge adjustment. He might struggle to fit into a 'normal' family dynamic, and there could be some friction as they all get to know each other again.