The story would be transformed in multiple ways. Firstly, Harry would have a proper family upbringing, which means his values and beliefs could be shaped differently. Secondly, the relationships with his friends would also be different. Ron and Hermione might not be his first and closest friends as in the original story. Thirdly, the power balance in the wizarding world could shift. With his parents alive, they could be influential in the fight against Voldemort, potentially leading to a quicker end to the Dark Lord's reign. Also, the way magic is perceived by Harry could be different since he would have learned it from his parents at a young age.
If Harry time - travels and saves his parents, Hogwarts might be a very different place for him. He could have grown up knowing about the wizarding world from his parents, so he would be more prepared. The threat of Voldemort might still exist, but the dynamic of the fight against him would be altered. For example, his parents could be part of the Order of the Phoenix and fight alongside him. And Harry might not have his famous scar, which was a result of Voldemort's failed attempt to kill him when his parents died.
The whole story would be very different. Harry might not end up living with the Dursleys, so his personality could be less guarded and more confident. He may not have the same connection to the Sorcerer's Stone quest as he did in the original story. Also, the relationship between Harry and Snape would change completely since the reason for Snape's complex feelings towards Harry was his love for Harry's mother.
Well, for one, Harry would grow up in a loving family environment. He wouldn't have to live with the Dursleys. His magical education would likely start much earlier and be guided by his parents, especially James who was also a very talented wizard. His confidence and self - esteem would be much higher as he wouldn't have the emotional baggage of being an orphan.
The plot would change a great deal. For one, Harry wouldn't have to live with the Dursleys. He would grow up in a loving magical household. He'd be more confident and perhaps less of an underdog. His parents would be able to train him in magic from a young age, so he might be more advanced in his studies when he gets to Hogwarts. Also, the fight against Voldemort would be a family affair, with James and Lily Potter being key players in the battle against the Dark Lord.
If his parents were alive, the whole dynamic with Voldemort would be different. Instead of being an orphaned hero, Harry would be part of a family unit fighting against Voldemort. His parents could train him in advanced magic, and they might have connections and resources that could be used to combat Voldemort more effectively. Also, Harry might not have had the same emotional journey of self - discovery as he did in the original story, because he would have a more stable family environment.
If Harry is abandoned by his alive parents in fanfiction, it could completely change the story. For one, he might not grow up with the Dursleys. He could end up in a different magical or muggle family. This new family could either be very loving or have their own ulterior motives. His personality might also be different as he wouldn't have the same experiences of being an unwanted child in the Dursley's house. He could be more confident or perhaps more bitter depending on how his new family treated him.
The plot would change drastically. Harry would not be living with the Dursleys, so there would be no need for him to escape that horrible situation. Voldemort might have a harder time targeting him as his parents would be on high alert. There would be no letter - hunting drama. Also, his relationship with Snape would be different as his father was Snape's rival. His parents could have taught him some advanced magic from a young age, which would make him stand out at Hogwarts in a different way than in the original story.
If Harry met his parents in fanfiction, his relationship with his friends might become even stronger. His friends would be happy for him, and they could all share in the newfound family bond. Harry might be more confident and self - assured, which would make him a better friend. He could also introduce his friends to his parents, and his parents could give his friends some advice or magical gifts, strengthening the whole group's connection.
Well, perhaps Harry uses a time - turner that has been magically enhanced to travel far enough back. He could disguise himself and befriend his parents, subtly guiding them to safety. Or he could change the circumstances of their meeting, for example, if he makes sure that they meet in a more secure place. Also, he could try to influence the actions of the Marauders so that they are more vigilant in protecting his parents.
Well, if Harry's parents were alive in fanfiction, it would completely change the whole dynamic. For one, Harry wouldn't have to live with the Dursleys. He'd grow up in a loving magical home, learning magic from his parents right from the start. His self - confidence would likely be much higher as he wouldn't have endured years of neglect and abuse. Also, the fight against Voldemort would be different. His parents would be right there beside him, using their skills and knowledge to fight the Dark Lord. Maybe they could have prevented some of the tragedies that occurred in the original story.
His confidence would grow. Knowing he has his parents' love and support directly would make him bolder. He might not be as quick to jump into dangerous situations on his own.
His confidence would probably soar. Knowing he has his parents, who are likely strong ninjas, supporting him would make him feel more secure. He might become a bit less reckless as he now has people who care about him deeply and he wouldn't want to worry them.