Applejack = Freddie, from Five Nights at Freddies
Fluttershy = Samara, from The Ring
Twilight Sparkle = The Armless Man, from Silent Hill
Starlight Glimmer = Pinhead, from Hellraiser
Pinkie Pie = Chucky, from Child's Play
Rainbow Dash = Jason, from Friday the 13th
Rarity = Hannibal Lecter, from Silence of the Lambs (and Hannibal)
Spike = Stripe the Gremlin, from Gremlins
Fluttershy = Samara, from The Ring
Twilight Sparkle = The Armless Man, from Silent Hill
Starlight Glimmer = Pinhead, from Hellraiser
Pinkie Pie = Chucky, from Child's Play
Rainbow Dash = Jason, from Friday the 13th
Rarity = Hannibal Lecter, from Silence of the Lambs (and Hannibal)
Spike = Stripe the Gremlin, from Gremlins