Well, it could be really interesting. For example, if Harry was replaced with a cat. The cat could have special powers like being able to see things that are hidden from normal view. It could slink around Hogwarts, getting into all sorts of nooks and crannies that a human Harry couldn't. And the way it would interact with other characters would be different too. Hermione might be constantly trying to keep the cat - Harry out of trouble, while Ron might find the cat's antics both annoying and endearing.
Imagine Harry as a fox. A fox is known for its cunning. In this fanfic, the fox - Harry could use his natural slyness to outwit the bad guys. He could easily sneak into the Slytherin common room, which is supposed to be very difficult to access for non - Slytherins. And his relationship with Dumbledore might be more of a mentor - protégé relationship where Dumbledore has to tame the wildness in the fox - Harry while still harnessing his unique abilities.
If Harry was an owl, it would change the story a great deal. Owls are associated with delivering messages in the Harry Potter world. So an owl - Harry could have a natural ability to find people or places by following some sort of instinctive homing sense. He could also communicate in hoots and screeches which other magical animals could understand, creating a whole new way of interacting with the magical creatures in the Forbidden Forest and around the school.
The plot would change a lot. If Harry was a dog, for instance. His loyalty would be even more pronounced. He might be more likely to follow his friends into dangerous situations without question. Also, the way he approaches challenges would be different. Instead of using magic wands and spells, he might rely on his animal instincts like a strong sense of smell to track down things. This could lead to different solutions for the mysteries in the story.
In this fanfic, the shrub could take on the role of Harry Potter in the Triwizard Tournament. Instead of Harry facing the challenges, it's the shrub. Picture the shrub being carried by the dragons or trying to swim in the lake for the second task. It would be a comical and absurd sight.
One great fanfic could be 'Harry's Animal Form Adventures'. In this, Harry turns into a stag, just like his Patronus. It has really interesting scenes where he uses his new form to explore the Forbidden Forest in ways he couldn't as a human. Another is 'The Animagus Harry', where he discovers his ability to turn into different animals depending on his emotions. For example, when he's angry, he turns into a small but fierce badger.
Hermione would still be a main character. She might be intrigued by the shrub and try to study it. She could be constantly taking notes about its growth patterns and any magical properties it might have.
Well, just based on that title alone, it's difficult to determine its quality. There are so many aspects that make a Harry Potter fanfic great. For example, it could explore new relationships between the characters, or create exciting new magical adventures. But we don't know if 'skull is harry potter fanfic' does any of those things. So, it might be good, it might not.
One interesting plot could be that Harry turns into a stag, just like his father's Patronus. He could then use this form to explore the Forbidden Forest in ways he couldn't as a human. He might discover hidden magical creatures or ancient secrets. Another plot could be that he turns into a cat and has to navigate Hogwarts corridors without being noticed by Filch. He could also use his new form to spy on Snape and find out if he's really up to no good.
No. In the Harry Potter series, there are no stories about animal slaves. The series is centered around themes like magic education, family, and the struggle against Voldemort. Magical creatures are integral to the world - building, but they are not slaves. For example, the relationship between wizards and phoenixes is one of mutual respect, not of slavery.
Yes. In the Harry Potter series, there are many elements related to animals. For example, Harry's owl Hedwig, and the Animagus ability which allows wizards to transform into animals. So it can be considered part of animal fanfiction to some extent.
One possibility could be a world where Harry Potter takes on Voldemort's role in terms of power. The wizarding world would be in chaos as Harry, with his different values from Voldemort, tries to enforce his own version of order. He might use his knowledge of good magic in a twisted way, believing he is doing the right thing for the greater good. For example, he could start controlling the Ministry of Magic to implement changes he thinks are necessary, but which others may see as tyrannical.
I'm not sure if it's common. There are so many different types of fanfics in the Harry Potter fandom. Some focus on relationships, others on new adventures. While metamorph - related ideas are interesting, it might not be as common as, say, romance - centered fanfics.