This story is a sequel to The Truth Behind My Little Pony
The world had been invaded by Equestrians in the past, and many lost hope in survival. But then warriors were made. The Huntsmen/Huntresses were made to protect the people from the Grimm Equestrians. While they might be kids, they will hold the key to saving the world.
MLP is owned by Hasbro
RWBY is owned by Rooster Teeth
Original story/timeline by Opium4TmassS