Chapter three: Sunset Shimmer.

In Equestria girls Sunset Shimmer is introduced.

She was once a pony but she began to regain her memories of her old life and felt that she should be farther along in her studies but Celestia countered it. She ended up finding the 'portal' to the human world.

The 'portal' is actual a gate the connects the ponies world with the world they once inhabited as humans on the same planet.

The scientist created it as he began his work to try to make everyone return to normal but in the explosion the survivors that remained human got strangely colored skin as seen in the movie.

Sunset Shimmer returned to her old life and being still a little in the dark about her old life she went to the main school of the human world that also happened to have the statue the scientist made as the human side of the gate way back to the ponies old lives. She kept the book that was actually a cell phone turned into a book by the scientist before the explosion then after the explosion Celestia found the books taking them. She was tricked into believing that popularity was everything feeling a need of control when she struggled being back in her old life.

The scientist used her to try to make others remember who they really were by making her agree to bring the crown back to the human world….. But returning to Equestria Sunset was reminded of the very magical world and well ended up being greedy wanting it for herself by using the magic of the crown.

The crown looks the same as the one in the human world because there was spies from the human world who went to the pony world to help find ways to try to make the ponies remember they were once human.

Sunset ended up misusing the magic in the crown that ended up reacting to Twilight's magic that it connected itself to thus causing the defeat to happen since Twilight's true magic can be channeled with the help of her friends.

Twilight though believes she is actually a pony so goes back to what she believes is her home world….. A failure the scientist believed.

Sunset Shimmer remained in the human world as she felt she didn't belong in Equestria with her memories of her old life having more than others.

Well in the second Equestria girls they play music and their transformations happen….. The truth is that they actually still have some magic from what happened in them including Sunset Shimmer from when she turned into a She-demon but the only way they could find to channel this magical energy creating their transformations is through music.