He could be portrayed as a very clumsy human at first. Since he's used to his platypus body, he might have trouble adjusting to having hands and feet. For example, he could trip over his own two feet while trying to run.
One good fem Perry fanfiction could be 'The Adventures of Fem Perry'. In this, Perry might be reimagined as a female character with all her secret agent skills intact. She could have different interactions with Phineas and Ferb, adding a new layer of charm to the story.
One idea could be Perry having to navigate the human world while still trying to keep his secret agent identity hidden from Phineas and Ferb. He could end up getting a regular job as a human and have all sorts of comical misunderstandings at work.
Archive of Our Own (AO3) is also a great place to search. It has a well - organized tagging system. So if you search for 'Phineas and Ferb' and 'fem Perry', it should bring up relevant fanfictions. Plus, AO3 has a community that often recommends good reads in the comments.
One popular theme is time - travel adventures. Fans might write about Phineas and Ferb accidentally creating a time - machine and going back in time to meet their ancestors or visit important events in the history of their town. Another theme could be alternate universes, where things are a bit different in their world, like if they were superheroes or if the animals could talk all the time.
Definitely not a true story. Phineas and Ferb is full of imaginative and creative elements that couldn't happen in real life. It's all about having fun and adventures in a made-up world.
Candace could be a main character. Since Ferb is sick, she might be in a bit of a dilemma. On one hand, she still has her urge to bust Phineas if he does something out of the ordinary while taking care of Ferb. But on the other hand, she also cares about her brother and might be more lenient or even helpful.
Yes, there are. Some fanfics might focus on the friendship between Phineas and Ferb, or their interactions with other characters like Perry the Platypus. For example, there could be stories about how they solve a mystery in the neighborhood together. You can also look for fan - created crossovers that combine 'Phineas and Ferb' with other family - friendly shows in a non - adult way.