One possible plot could be that Sally is roboticized against her will. She then has to struggle to retain her humanity while dealing with the new abilities and limitations of her robotic form. Maybe she tries to find a way to reverse the process.
Perhaps in the fanfiction, Sally is roboticized as part of an experiment. At first, she is excited about the new powers and potential, but then she realizes that she is losing touch with her friends and the things she used to love. She embarks on a journey to find a balance between her robotic self and her original self.
The plot might involve Sally being roboticized in a freak accident. She finds herself in a world that is now very different for her. She has to learn how to interact with others in her new form. Some people might be afraid of her, while others might be curious. Sally has to prove that she is still the same person inside and that being roboticized doesn't change who she is at heart.
In addition to Sally, there could be other robotic characters in the fanfiction. Maybe there is a group of robots that Sally meets after being roboticized. They could either be friendly and help her understand her new state, or be hostile and see her as an outsider. And of course, her family members could also be characters, dealing with the changes in Sally.
One possible plot could be that Tails is captured by an evil scientist. The scientist then roboticizes him against his will. Tails has to struggle to keep his original self and memories while being forced to do the scientist's bidding. Eventually, he might break free from the robotic control through the power of friendship with Sonic and the others.
Well, in this 'sonic gets roboticized fanfiction', it might explore the idea of Sonic's identity when he becomes robotic. It could show how his friends react to this new form. For example, Tails might be shocked at first but then try to find a way to reverse the roboticization. And Sonic himself could be struggling with feeling less 'alive' in his robotic state, all while facing new enemies or challenges that are related to his new robotic nature.
Fans of Sonic who have a creative streak and an interest in exploring different scenarios for the character might write it. They could be young writers who are really into the Sonic universe and want to put their own spin on things.
One possible plotline could be Sonic struggling to come to terms with his new robotic parts. He might face challenges in his speed or his usual acrobatic abilities and have to relearn how to move and fight. For example, his robotic parts could malfunction at crucial moments.
A rogue robotic entity could be the main antagonist. This entity has the ability to roboticize other beings and views Tails as a prime target. It wants to use Tails' body as a vessel to spread its robotic influence further, so it sets out to roboticize him and then use him as a tool for its own dark purposes.
Sorry, I don't have a specific 'sonic gets partially roboticized fanfiction' to recommend directly. But you can try searching on some popular fanfiction websites like Archive of Our Own or FanFiction.net.
Well, when Sonic gets roboticized in the comic, he has to adapt to his new mechanical state and battle against the forces that caused this change. There are lots of action-packed scenes and unexpected plot twists.
One possible plot development could be exploring how Percy and his friends deal with this unexpected situation. Maybe they would have to face the reactions of the demigod community. It could also lead to Percy having to grow up very quickly and take on more responsibilities.
Another aspect could be the challenges they face during the pregnancy. Sally might have health issues, and Percy would have to step up and take care of her. He could start working extra jobs to save for the baby's future. Also, they might need to find a new place to live that is more suitable for a family.