Naruto's chakra control and the Infinity Stones' powers could create some unique combinations. For example, he could use his chakra to better manipulate the Infinity Stones. His ability to use shadow clones might be enhanced by the Mind Stone, allowing him to create clones with different mindsets or abilities.
Well, he would probably become extremely powerful. He could use the Time Stone to go back and change certain events in the wizarding world, like preventing some of Voldemort's evil deeds. With the Power Stone, his magical abilities might be amplified to an unimaginable level, allowing him to defeat any dark wizard with ease.
First of all, Naruto's world is different from the Marvel universe. But if he got all the Infinity Stones, he might use the Power Stone to enhance his already strong Rasengan. Imagine a Rasengan with the power of an entire universe behind it. He could also use the Time Stone to go back in time and prevent some of the tragedies that happened in his own world, like the death of his parents.
When Harry Potter gets the Infinity Stones in the fanfiction, the story could take many interesting turns. For starters, he might use the Time Stone to go back and learn from the greatest wizards in history, thus becoming an even more powerful wizard himself. He could also use the Space Stone to explore unknown magical realms and bring back new forms of magic to Hogwarts. The story would also likely involve a lot of moral dilemmas for Harry, as the power of the Infinity Stones could corrupt him if he's not careful. His friends would play an important role in keeping him on the right path while he navigates the new powers and responsibilities that come with the stones.
In this type of fanfic, the Infinity Stones could have a very different effect in the Harry Potter universe. For example, the Time Stone could be used to reverse dark spells or resurrect fallen wizards. However, the Stones' power might also be limited by the magic rules of the wizarding world. The fanfic could delve into how the characters from both universes adapt to the presence of the Stones and how they use or misuse their power.
A Jedi with all the Infinity Stones would be an extremely powerful force. They could use the Time Stone to foresee any threats to the galaxy and prevent them before they happen. With the Mind Stone, they could potentially influence the minds of Sith Lords to turn them away from the dark side.