Quarantine

At the Equestria Games, the Mane Six, Spike, and some other characters are locked inside the stadium to prevent the spread of a highly contagious and lethal disease.

The Equestria Games get cut short as the entire stadium is put under quarantine as a disease spreads through the stadium. The Mane Six, Spike, and few other characters are forced to survive long enough for the CDC to come up with a cure for the mysterious virus.

CDC: Canterlot Disease Control

Crossover with the Quarantine movie series.

Teen

Cancelled

My Little Pony: Friendship is Magic

Alternate Universe

Thriller

Mystery

Horror

Crossover

Gore