This story will continue off from where Chapter 6 of Kamen Rider Jurassic ended and will focus on only the events that happen in Equestria. So, to avoid being confused, you might want to read the 6 chapters of Jurassic first.

All Kamen Rider, Super Sentai and My Little Pony FIM all belong to their original owners.

With Canterlot High being the target for the destruction of all multiverses by monsters and villains led by a darkness born from different worlds. Powers from riders across multiple worlds must call upon wielders to help defend all life. Even though the price will be having to start a new life with no way to return to their old world.

A Displaced Rider Story.
I'm putting this Rated Teen mostly cause I'm not sure completely what else I'm putting in besides the language a bit so far.

All Kamen Rider and Equestria Girls belong to their original owners.