Are there multiple animatronics in Five Nights at Freddy's 3?

Solution 1:

There is only one animatronic: Springtrap. Every other "animatronic", referred to as Phantoms in the Extras menu (Phantom Bonnie, Phantom Freddy, Phantom Marionette, Phantom BB, Phantom Foxy, Phantom Chica) are hallucinations caused by poor ventilation. This is why on Day 1 the phone guy specifically tells the player to make sure the ventilation works, otherwise you'll start to see "stuff".

Solution 2:

From Steam's main page on the game (http://store.steampowered.com/app/354140/):

About This Game

Thirty years after Freddy Fazbear's Pizza closed it's doors, the events that took place there have become nothing more than a rumor and a childhood memory, but the owners of "Fazbear's Fright: The Horror Attraction" are determined to revive the legend and make the experience as authentic as possible for patrons, going to great lengths to find anything that might have survived decades of neglect and ruin.

At first there were only empty shells, a hand, a hook, an old paper-plate doll, but then a remarkable discovery was made...

The attraction now has one animatronic.

Short answer - read the bottom line. There is one animatronic.

Solution 3:

there is springtrap PHANTOMS: chica, freddy, puppet, balloon boy, foxy

PS Bonnie isn't in it, springtrap is an older version of him

PPS There is also a balloon girl, which fixes your stuff when the phantom animatronics break them.