What could be the possible plotlines in a 'Tails Turns into a Robot' fanfiction?

Well, one place to look for such fanfiction could be FanFiction.net. There are often many Sonic - related fanfics there. Maybe search for 'Tails turns into a robot' directly in the search bar on the site. Another option is Archive of Our Own (AO3). It has a large collection of fan works as well, and you might find some interesting takes on Tails becoming a robot in the Sonic universe.

Well, one possibility could be that Tails is forced to become a robot against his will. Maybe an evil scientist captures him and turns him into a robotic servant. He could then struggle to regain his free will and his original form. He might use his mechanical skills, even in his robotic state, to outwit the scientist and find a way to reverse the process.

Well, in this fanfiction, if Ash turns into Pikachu, it might lead to a story where Pikachu - Ash discovers new aspects of the Pokémon world. For example, he could experience the world from a Pokémon's perspective, understanding their fears and joys more deeply. He might also have to deal with other Pokémon who don't immediately recognize him as Ash and react in different ways to this strange Pikachu.

If Sonic turns into a robot in fanfiction, he might gain new abilities. For example, he could have enhanced strength and more precise control over his speed. However, he might also face problems like being hacked or having mechanical malfunctions. His friends like Tails would have to use their technical skills to help him out.

A possible plot could focus on how Tails' daily life changes. As a girl, she might have to deal with different social expectations. Her hobbies and interests could shift slightly. For example, she might be more interested in certain types of fashion or more nurturing activities. Her relationship with Amy could also change, perhaps they become closer friends as they share more 'girly' things. And Tails' mechanical skills might be seen in a new light, as she uses them in a different way to solve problems in her new form.

Another plotline could involve their relationships. Sonic, as the younger one, might be more naive in some ways and look up to Tails for guidance. Tails, in Sonic's body, could find it strange to be the center of attention and the one expected to lead. Their friendship dynamic would change completely. Maybe Sonic would start to envy Tails' natural intelligence more, while Tails would realize how much pressure Sonic was under all the time.

One possible plot could be that Tails is exposed to some dark energy or a powerful, corrupting artifact. This makes him gradually turn against his friends. He might start using his intelligence to outwit Sonic and the others for his new, evil goals.

One possible plotline could be that Ash, as a girl, might face more discrimination in the male - dominated Pokemon trainer world at first. But she overcomes this with her determination and unique skills, proving that gender doesn't matter in Pokemon training.

Dr. Eggman could still be the main antagonist. Even if Tails turns evil, Eggman might see him as a threat to his own evil plans. He could try to stop Tails while also taking advantage of the chaos Tails is causing among Sonic and his friends.

Maybe Sakura gets the Nine - Tails' power accidentally. This could lead to her struggling to control it at first. As she tries to master it, she could form new relationships with other characters who either help or hinder her progress. For example, some might be jealous of her new power, while others might be intrigued and want to study it.