On another normal day in Canterlot High in 2019, the Humane 7 with their new friend Marty Mcfly have came across Dr. Emmet Brown of Dr. E,B, Enterprises as he introduced his time traveling Delorean he made back in 1985. He gave them a demonstration of how it works and what made time travel possible is the flux capacitor. But when they where attacked by a terrorist group, Marty and the girls ran for their lives and accidentally went back thirty years from 2019 to 1989. As they came across the Emmet Brown of 1989 they all must assert his help in order to get back to their time period and give him the warning of the terrorists before they return.

Back to the Future (c) Universal
MLP EG (c) Hasbro

After the Friendship games, the Mane 7 sets out to camp Everfree to solve some hidden secrets with the living entity Gaea Everfree. But they will be met by another evil not from equestria but from hell.

The 1971 Lincoln Continental Mark 3, named Trinity is about to come across the Mane 7 in a non hostile way, but to solve the mystery of Gaea Everfree and save the camp from the imminent foreclosure, before it's too late. But a battle between a Forest spirit and a motorized monster is about to begin.

And there were many questions.
Is it a phantom, a demon, or the devil himself?
What Evil Force Drives....... THE CAR?

Note: I do not own any of the movies it is just a idea to make a crossover
Equetria girls belongs to Hasbro
THE CAR belongs to Universal