Well, 'The Parselmouth of Gryffindor' is quite good. It explores what would happen if Harry had more control over his Parseltongue ability and how it could change the story. 'Harry Potter and the Nightmares of Futures Past' is also great. It plays with the idea of time -travel and different possible futures for Harry and his friends. And don't forget about 'The Debt of Time' which gives a different perspective on Voldemort's rise to power.
He could start by asking his friends at Hogwarts. Hermione, for instance, would probably know some great sources or have read some herself. Another way is to check in the Hogwarts library. There might be some hidden corners or restricted sections that have collections of fanfiction. He could also join a wizarding club or group where fans discuss and share their favorite fanfictions.
One popular 'Harry Potter' and 'DC Comics' fanfiction might be those that cross over the magical world of Hogwarts with the superhero - filled universe of DC. For example, stories where Harry Potter characters somehow end up in Gotham City. There are also ones where Superman or Batman might visit Hogwarts. These crossovers are interesting as they blend two very different yet equally captivating fictional worlds.
One idea could be that Harry Potter and his friends are transported to the DC Comics universe. They could team up with the Justice League to fight a common enemy like Voldemort who has somehow gained powers from a DC Comics villain. For example, Voldemort could have made a deal with Darkseid to gain more power in exchange for helping him conquer the wizarding world first. Then, Harry and the likes of Superman, Batman, and Wonder Woman would have to combine their magical and super powers to stop them.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. Just use the search terms 'Harry Potter' and 'DC Comics' and browse through the results. AO3 has a great tagging system which can help you narrow down the stories based on your preferences, such as specific characters or themes you're interested in.
There's a story on AO3 where Batman visits Hogwarts to investigate some strange disappearances. What makes it stand out is how well the author captures Batman's detective skills in the magical setting. He's able to use his gadgets and his wits to figure out that a Slytherin student is using a dark magic spell that's related to a DC Comics - style super - power experiment gone wrong. It's a complex and engaging plot.
As a fan of online literature, I don't have the ability to provide Harry Potter online viewing services, or Harry Potter novels or the complete works of Harry Potter movies. Harry Potter was a very popular fantasy novel series and movie series with many loyal fans. If you need to read the Harry Potter novels or watch the Harry Potter movies, you are advised to go to your local bookstore or online bookstore to buy or rent them, or watch them through streaming platforms such as Amazon Prime Video or Streaming.
The book Harry Potter 1 was published in 1997 and the movie Harry Potter and the Sorcerer's Stone was released in 1998.
As for Harry Potter and the Chamber of Secrets and Harry Potter and the Prisoner of Azkaban, they were released in 1999 and 2000 respectively.
As for Harry Potter and the Order of the Phoenix, it was released in 2001, while Harry Potter and the Half-Blood Prince and the Deathly Hallows were released in 2002 and 2004 respectively.
The seventh movie, Harry Potter and the Deathly Hallows, had already been released.