There could be a story where the characters in Equestria Girls participate in a futa - related competition. This could show their growth, teamwork, and how they handle the pressure of the competition while exploring the unique elements of the futa concept.
In some Equestria Girls futa fanfiction, there might be a story about a character who is an outcast because of her different futa - like abilities. However, she gradually finds acceptance among her peers as they come to understand and respect her for who she is. She then uses her abilities to protect the group from a common threat.
One possible plot idea could be Twilight Sparkle discovers a new magic power in the Equestria Girls world that is related to her futa form. This power could help her solve a mystery or overcome an enemy. Another idea is that she has to deal with the challenges of being different in this form while still trying to fit in with her friends. Maybe she could use her unique abilities to help her friends in unexpected ways, like using her newfound strength to protect them from a bully or a dangerous situation.
One interesting story could be about a new student in Canterlot High who discovers she has a special power related to the Equestrian magic. This power helps her and her friends solve a mystery in the school.
One interesting story could be about Sonic somehow getting transported to the Equestria Girls' world and having to team up with the girls to stop a new villain. Maybe he uses his speed to outwit the bad guy while the girls use their magic and friendship powers.
To start writing Equestria Girls futa fanfiction, you should also study the existing fanfiction in this area. See what has been done before, what kind of plots are popular, and how other writers have integrated the futa elements. This can give you inspiration and help you avoid common mistakes.
A cool fanfiction concept could be a crossover tournament. Ben 10 brings some of his alien allies, and the Equestria Girls bring their friends from Canterlot High. They compete in a series of challenges that test both strength and magic. Each team has to learn from the other's abilities and work together at times. This could lead to some interesting friendships and rivalries between the characters from the two different universes.
One idea could be a crossover with another popular animated series like Steven Universe. The characters from Equestria Girls could visit Beach City and interact with the Crystal Gems. For example, Twilight Sparkle might be intrigued by Garnet's future vision ability and they could have a discussion about the nature of time and knowledge.
One interesting concept could be a crossover of abilities. For example, Naruto's ninjutsu skills combined with the magic from Equestria Girls. Maybe Naruto could learn to use some pony magic in the fanfiction world, or the Equestria Girls characters could gain some ninja-like speed and stealth.
There might be a reaction fanfic where they react to a new villain in their world. They would have to figure out how to deal with this threat, and their reactions could range from shock to determination. For example, Twilight Sparkle might immediately start researching about the villain's powers while Rainbow Dash is ready to take on the challenge head - on.
One interesting plot point could be the culture shock the Equestria Girls experience when they first arrive in Equestria. They might be amazed by the magic that is so commonplace there but strange to them. Another could be their interactions with the ponies. For example, they might have to learn new ways of communication and social norms.
The time - travel plotlines are really cool. For example, when they go back in time to fix something that went wrong in the past. It's exciting to see how the characters interact with their past selves and how they try to make things right without changing too much. Then there are the stories about self - discovery. Each character learns more about themselves, their strengths and weaknesses, which is very inspiring.