What are some interesting plot ideas in 'harry is a shapeshifter fanfiction'?

One idea could be Harry discovers he has the ability to shift into a powerful magical animal like a phoenix. He could use this form to secretly protect Hogwarts from dark forces at night. Another plot could involve Harry being cursed to randomly shift into different animals until he finds a way to break the curse, leading to some comical and dangerous situations as he tries to adapt to each new form.

One idea could be a pokemon shapeshifter that is trying to hide its true form in a human - dominated city. It has to constantly adapt and learn human behaviors to avoid detection.

One idea could be a dragon shapeshifter who is forced to hide in human form in a modern city. They have to constantly struggle to keep their true identity a secret while also being drawn to other magical beings in the city. Another plot could involve a dragon shapeshifter falling in love with a human, and having to decide whether to reveal their true form or not. Or perhaps a story where a dragon shapeshifter is on a quest to find a lost magical artifact that is crucial for the survival of their dragon clan.

One plot idea could be Ash getting the ability to shapeshift accidentally. For example, he touches a strange Pokemon or an ancient artifact. Then he has to figure out how to control this new power while on his journey to become a Pokemon master. Another idea is that an evil organization wants to use Ash's shapeshifting ability for their own nefarious purposes, so he has to avoid them and protect his friends.

Perhaps Harry discovers he's a shapeshifter early on in his Hogwarts years. He might use this power to play pranks on the Slytherins by changing into a mouse and scaring them in the dungeons. But then, he realizes he has a greater responsibility when he sees the potential of using it against the Dark Arts. For example, he could shift into a large and powerful animal like a hippogriff to fight off Dementors.

One idea could be a Pokemon that can shapeshift into different legendary Pokemon to gain their powers. For example, it could shift into Mew to use its psychic abilities in unique ways. Another idea is a shapeshifting Pokemon that disguises itself as other common Pokemon to play pranks on trainers. It could be really fun to write about the chaos it causes.

One idea could be that the Chasers create a new super - secret Quidditch move that Harry has to learn in order to defeat a powerful rival team. Another could be a story where the Chasers take Harry on a wild adventure outside of Hogwarts during a break from school to search for a rare magical Quidditch item. Or perhaps a plot where the Chasers and Harry form a special bond over dealing with a bully on the Quidditch pitch who is using dark magic to gain an unfair advantage.

One idea could be Harry arriving in Westeros and using his magic to combat the White Walkers. His spells might be a new weapon against the undead. Another could be Harry getting involved in the power struggles between the different kingdoms, perhaps siding with a particular house and using his skills to help them gain the Iron Throne.

One idea could be that Harry, with his magical skills from the wizarding world, somehow gets transported to Gotham City. He teams up with Batgirl to fight a new kind of villain who is using a combination of magic and technology. Harry could use spells like Protego to shield them from attacks, while Batgirl uses her martial arts and gadgets.

Perhaps Acheron gets transported to Hogwarts for some mysterious reason. Harry is the first to discover him and has to figure out how to deal with this strange, powerful being. Along the way, they start to understand each other's powers and learn from one another, forging an unlikely friendship.