There's also a fanfiction called 'The Hellhound Percy'. In this one, Percy as a hellhound forms an unlikely alliance with some demigods. The story is great because it shows how Percy overcomes the prejudices associated with being a hellhound while still retaining his heroic nature. It delves deep into his character development in this new form.
Well, I'm not sure of the exact title, but there are some fanfictions where Percy becomes a hellhound and is involved in battles in the Underworld. These often explore the different powers Percy might have as a hellhound, like enhanced speed and strength, and how he uses them to protect his friends and the world above from the threats emerging from the Underworld.
One popular 'Percy is a hellhound' fanfiction might be 'Percy's Hellhound Adventure' where Percy discovers his new form as a hellhound and has to navigate a world that now fears him. It has some really interesting plot twists.
In a fanfiction, the hellhound could be a protector of Percy instead of an enemy. It could be that the hellhound was once a pet of a powerful god who turned evil, and Percy helps it break free from the evil influence. So the hellhound then becomes loyal to Percy and helps him in his quests, like warning him of approaching monsters or even fighting alongside him against stronger foes.
There's also a fanfic where a hellhound becomes a protector of Percy's sister. In this 'Percy Jackson Hellhound Fanfiction', the hellhound's loyalty and the way it interacts with the characters in the Percy Jackson universe are really interesting. It shows a different side of these usually menacing beasts.
Fanfiction.net is a great place to start. There are tons of 'Percy Jackson Hellhound Fanfiction' there. You can search by tags like 'hellhound' and 'Percy Jackson' to narrow down the results.
One common theme is identity. Percy has to figure out who he is now as a hellhound, different from his normal self. Another theme could be acceptance, as he has to deal with how others perceive him in this new form.
Perhaps the hellhound is a part of a prophecy. In the fanfiction, it could be foretold that a hellhound will either bring great destruction or be the savior of the demigod world. Percy then has to figure out which path the hellhound is on and try to influence it to the side of good if it's the one that could cause destruction.
Sure. You can start by looking on some popular fanfic websites like Archive of Our Own. Just search for 'artemia hellhound' there and you'll likely find a good number of fanfics.
One great 'Harry Potter Hellhound Animagus' fanfiction is 'The Hellhound's Secret'. It has an interesting plot where the main character discovers they are an Animagus in the form of a hellhound and has to navigate the dangerous wizarding world while hiding this secret. The story is full of mystery and adventure.
Well, perhaps in the fanfiction, the Hellhound King has a connection to an ancient prophecy. Percy is tasked with either killing it or taming it to fulfill the prophecy. As Percy delves deeper, he realizes that the Hellhound King has a complex personality and motives that are not just about destruction. It could also be that the Hellhound King has a hidden lair full of secrets and treasures that Percy needs to explore for some reason, like to find a weapon to defeat a new threat.
One idea could be the hellhound having a secret bond with Percy. Maybe it starts out as a dangerous encounter but as Percy tries to understand the hellhound's motives, they form an unexpected alliance. This could lead to them facing off against common enemies in the Percy Jackson universe.
I'm not sure of specific 'Harry is a Hellhound' fanfictions off the top of my head. But you can start by looking on popular fanfiction websites like Archive of Our Own. Just search for the title or relevant tags and you'll likely find some good ones.