A possible fanfiction could involve a shapeshifter who is actually an alien sent to study the Avengers. The shapeshifter takes on the forms of different Avengers to understand their powers and personalities better. However, they get caught up in a battle against a common enemy and end up becoming a true part of the team, using their unique shape - shifting abilities to outwit the foe.
In a shapeshifter Avengers fanfiction, the shapeshifter could be a long - lost relative of one of the Avengers. They have been living in hiding due to their shape - shifting abilities being feared in their home world. When they come to Earth and meet the Avengers, they initially struggle to fit in. But with time, they learn to control their powers and become an invaluable asset to the team, especially in situations where stealth and deception are required.
One idea could be a shapeshifter who infiltrates the Avengers under the guise of a new recruit. They start causing chaos within the team by spreading false information and creating mistrust among the members. But as the story unfolds, the shapeshifter has a change of heart and decides to use their powers for good instead, helping the Avengers defeat a greater threat.
A great way to create a compelling shapeshifter character is to make them an outcast. In the context of an Avengers fanfiction, the shapeshifter could have been rejected by society because of their power. This would give them a complex personality, as they might be both resentful and desperate for acceptance. Also, let their shape - shifting ability reflect their emotions. When they're angry, they might involuntarily shift into a more menacing form. This adds depth to the character.
How about a story where a shapeshifter family moves into a new town? The family members can transform into different things to adapt to the new environment and help the local people. For instance, the father might change into a strong bear - like form to move heavy objects during a community building project, while the mother could transform into a gentle dolphin - like creature to teach kids about the ocean in a local school.
One idea could be a pokemon shapeshifter that is trying to hide its true form in a human - dominated city. It has to constantly adapt and learn human behaviors to avoid detection.
One idea could be that Harry uses his shapeshifting ability to spy on the Death Eaters unnoticed. He could transform into a small creature like a mouse and infiltrate their meetings.
One idea could be a dragon shapeshifter who is forced to hide in human form in a modern city. They have to constantly struggle to keep their true identity a secret while also being drawn to other magical beings in the city. Another plot could involve a dragon shapeshifter falling in love with a human, and having to decide whether to reveal their true form or not. Or perhaps a story where a dragon shapeshifter is on a quest to find a lost magical artifact that is crucial for the survival of their dragon clan.
One plot idea could be Percy using his shapeshifting ability to infiltrate the lair of a powerful enemy. He could transform into a small animal like a mouse to get past defenses and then change into a more formidable form to fight. Another could be Percy struggling to control his shapeshifting, accidentally changing forms at inconvenient times, like during a school exam or a tense conversation with his friends.
One idea could be Harry discovers he has the ability to shift into a powerful magical animal like a phoenix. He could use this form to secretly protect Hogwarts from dark forces at night. Another plot could involve Harry being cursed to randomly shift into different animals until he finds a way to break the curse, leading to some comical and dangerous situations as he tries to adapt to each new form.
One plot idea could be Ash getting the ability to shapeshift accidentally. For example, he touches a strange Pokemon or an ancient artifact. Then he has to figure out how to control this new power while on his journey to become a Pokemon master. Another idea is that an evil organization wants to use Ash's shapeshifting ability for their own nefarious purposes, so he has to avoid them and protect his friends.
Perhaps Harry discovers he's a shapeshifter early on in his Hogwarts years. He might use this power to play pranks on the Slytherins by changing into a mouse and scaring them in the dungeons. But then, he realizes he has a greater responsibility when he sees the potential of using it against the Dark Arts. For example, he could shift into a large and powerful animal like a hippogriff to fight off Dementors.
One idea could be that the OC is a new addition to the Avengers team and discovers she's pregnant. The team members, being like a family, rally around her. For example, Thor might offer his protection, while Black Widow gives her advice on how to balance being a superhero and a mother - to - be. They could also help her keep her pregnancy a secret from the villains for as long as possible.