In the first game, they consist of Freddy Fazbear, Bonnie, Chica, Foxy, The Puppet and the Mysterious Golden Freddy, which all are from the original games. They were taken from FNaF 2, which Bonnie was modified to have a face. Sugar was in the original version, titled Five Nights at Freddy's 3 Fan-Made. They are defended with the mask.
In the second game, they consist of Freddy, Bonnie, Chica, Foxy, The Puppet, and Golden Freddy, as well as some new ones: Dug, Kitty Fazcat, Shadow Lockjaw, and Lockjaw, although he was hidden. Sugar was also redesigned, and returned. They are defended with the mask.
In the third game, the game consists of Freddy, Bonnie, Chica, Foxy, Golden Freddy (he appears at the side of the office rarely), Kitty Fazcat, Lockjaw, Vigo and the Mysterious Shadow Lockjaw. You must defend yourself with Door locks and corrupt signals. The animatronics in this game, are very damaged, and have lots of rips on them. The animatronic Vigo was bought in a Shop.
In the fourth game, the animatronics consist of Freddy Fazbear, Bonnie the Bunny, Koly the Koala, Sally the Panda, Kitty Fazcat and Lockjaw. All the other animatronics from the third game were destroyed when Fazbear Fantasy Land was demolished. You can escape then by using the Locker and the smoke mechanics. In this game, the animatronics seem to be in a fixing process, with just a few damage in they're suits. Golden Freddy, is still present in the game, but as an easter egg. In addition, two more easter eggs appear: Purple Freddy and Golden Lockjaw. The animatronics also have upper heads that are floating from their lower jaw, with the exception of Golden Freddy and Shadow Freddy.