Timeline:
Fredbear's Family diner (1968-1970): Everything is all fine and dandy, with the two animatronics that everyone loves: Fredbear and Spring Bonnie. But then a child was murdered outside one day, resulting in the place getting shut down, along with Spring Bonnie being faulty.
Freddy Fazbear's Pizza(V1)(1970-1980): Fredbear was more popular so they tried to rebuild him, and built others too. After opening the staff noticed that Fredbear was A LOT less popular then the others, so they scrapped him. The first murders happened. The kids were stuffed into the five suits and went on to possess them. The suits started to smell, BAD. They had to close due to health violations.
Freddy Fazbear's Pizza(V2):(1987-1987) The toy models were built, the older models being used for spare parts. A certain SOMEONE hacked into the toys, making them hostile to adults. Though, it wasn't only a hack, a second murder happened, these kids possessed the toys. Sadly, this pizzeria only lasted 1 1/2 months, as the Bite of '87 happened. The toys were scrapped.
Freddy Fazbear's Pizza(V3)(1990-1994): The old models were refurbished, even Fredbear, now know as "Golden Freddy". But again, GF was the least popular, they scrapped the poor thing once again. Things were pretty normal, except at night, when the animatronics would kill the night guard. But alas, the stink popped up again. The pizzeria was closed again. The children's souls still trapped.
Fazbear's Fright (2015-2015): The horror attraction based upon FFP was built. Needless to say it wasn't scary. At all. Until they found Springtrap. Unknown to them the souls had confronted their murderer, and he died in the suit, his soul now trapped inside...