One possible plot could be that a new, mysterious pet appears in the pet shop in Diagon Alley. This pet has some unique magical abilities that no one has ever seen before. A young witch or wizard discovers it and tries to figure out its origin and how to take care of it. Maybe it's a key to an ancient magic mystery.
Well, he might sell magical creatures like owls, toads, and perhaps even some rare and exotic ones like hippogriffs. He could use his knowledge of magic to take care of the pets and also teach the customers how to handle them properly.
One main character could be a young, aspiring wizard who has always dreamed of having a magical pet. He visits the pet shop regularly to look at all the amazing creatures. Another could be the eccentric old owner of the pet shop who has a wealth of knowledge about magical pets.
It could be Hagrid. He loves all kinds of magical creatures and would be very interested in seeing what Harry has in his pet shop. He might even give Harry some advice on taking care of the more dangerous ones.
Harry Potter himself could be a main character. He might be on a mission to find a pet for a friend or to solve a mystery related to the pet shop. Hermione would also be a great choice as she's always interested in learning about new magical creatures. And Hagrid, of course, with his love for all beasts, could play a major role.
Well, you could have a plot where a rare and dangerous pet escapes from the Pet Shop of Horrors and the main characters from Harry Potter have to track it down before it causes chaos in the wizarding world. Maybe there's a pet that can change its form and is being used by a dark wizard to spy on Hogwarts students. Or it could be that a special pet is the key to unlocking a hidden magic in the Forbidden Forest and different characters are vying to get it from the pet shop.
Well, it could be a magic item shop. Since Harry Potter is from the wizarding world, he might sell things like wands, potions, or magical artifacts in Konoha.
I'm not sure which work you're referring to. If you can provide more context or information, I will be more than happy to help you answer your questions.
There could be. Fanfiction often takes the existing elements of a story and twists them in new ways. Given that Cerberus is a well - known mythological creature and the Harry Potter series already has a connection to it (like the three - headed dog Fluffy), it's not far - fetched to think that a fanfic writer would create a story where Harry has a pet Cerberus. However, it might be a bit of a wild concept considering how dangerous Cerberus is in the original mythology.
Maybe it's an anonymous gift from someone who has been observing Harry. This person could be a former student of Hogwarts who has a special connection to snakes and sees that Harry has a kind heart and would take good care of the snake. So they leave the snake for Harry to find with a simple note that just says 'For Harry Potter'.