Definitely possible. A good fanfiction in this case would depend on how well the writer combines the magical aspects of Harry Potter and the Pokémon - related elements of Team Rocket. They could make Harry a sort of mentor to Team Rocket, teaching them about honor and friendship through his Hogwarts experiences. This would not only bring a new perspective to Team Rocket but also create an engaging story that fans of both franchises might enjoy.
It would be really strange. Harry Potter is from a world of magic and wizards, while Team Rocket is from the Pokémon universe. Maybe Harry would use his magic to deal with Team Rocket's antics in the Pokémon world. For example, he could use a spell to make their Pokémon unable to attack.
Sure. A 'Harry Potter creates Akatsuki fanfic' has the potential to be a great story. It could start with Harry somehow getting involved with the Akatsuki, maybe through a portal or a spell gone wrong. Then, he has to navigate their world, which is full of danger and intrigue. His magical skills would be his main asset, but he would also have to learn about the Akatsuki's ways to survive. The story could also explore how the two different worlds could learn from each other, making it not just a story of conflict, but also of growth and discovery.
Another plotline might involve Ash teaming up with some of the Team Rocket members, perhaps reluctantly at first. They could be forced to work together due to a common threat to both the good guys and the bad guys in the Pokemon universe. This would lead to some interesting character developments for Ash as he has to deal with the not - so - good nature of Team Rocket.
He could have found a magical artifact. There are many artifacts in the Harry Potter world that have strange and powerful abilities. It could be that this artifact has the power to create clones. He figures out how to use it, perhaps with the help of Hermione who is good at researching such things. And then he starts creating his clone army.
He could collaborate with Ollivander. Ollivander is the expert in wands, and he has a vast knowledge of wand - making materials and techniques. Working together, they could combine their knowledge to create something truly extraordinary.
One possible role is that he could be a spy. Since he was turned into a Pokémon, Team Rocket might not suspect his true identity and he could gather information about their evil plans. For example, he could overhear conversations between Team Rocket members that he couldn't have accessed as a human.
One possible motivation could be that she feels betrayed by her friends. Maybe she has a misunderstanding with Ash or the others, and Team Rocket takes advantage of this to convince her to join them.
Maybe it was an accident. Harry Potter was experimenting with some dark magic (which he may have been forced into or just out of curiosity) and things got out of hand, resulting in the creation of the plague.
One idea could be that Harry creates a school for magical creatures. He realizes that there are so many unique and often misunderstood creatures in the wizarding world, and he wants to give them a place to learn and grow. This school could teach them how to interact with wizards in a positive way, as well as develop their own magical abilities.
One possible storyline is that Dawn joins Team Rocket thinking it's a legitimate Pokémon training organization at first. But as she gets deeper into it, she discovers their true evil nature. Another could be that she is brainwashed by Team Rocket into joining them. Her friends then have to find a way to break the brainwashing. A third storyline could be that she joins willingly because she has some sort of vendetta against the Pokémon League and sees Team Rocket as a way to get revenge.