The Animatronics are a group of bosses that appeared on Slender Fortress.
Description[]
In the first game, the animatronics consist of the titular Freddy Fazbear, as well as Bonnie, Chica, Foxy, and additionally, the mysterious Golden Freddy.
In the second game, they consist of the aforementioned animatronics in a damaged state as well as their updated versions: Toy Freddy, Toy Bonnie, Toy Chica, and Mangle, along with two new characters: BB and The Puppet.
The game's developer, Scott Cawthon, has stated that there is a secret reason for the animatronics' homicidal tendencies that may involve paranormal activity. He has confirmed that the pizzeria is haunted by what is implied to be the ghosts of the victims of The Missing Children Incident. As a result, the screeches of the other animatronics upon killing the player are often theorized to be the terrified screams of said children who were murdered and presumably stuffed into the animatronic suits.
In Slender Fortress[]
Here is a list of Animatronics from Five Nights at Freddy's: