Tattletail is a miniature animatronic. He is somewhat small and has an egg-shaped body with small, human-like feet and a cat-like face. He has a small heart-shaped nose and large blue eyes with purple-blue eyelids, complete with large pointed ears resembling those of Furbies. Tattletail's fur can come in many different colors, and he is shown to be available in purple, yellow, and blue colors in the game. He appears to wear leg warmers that are usually difficult to notice at first. He also has an egg hole on the bottom of his model and a small tuft of hair on his head alongside a very-hard-to-see sharp-ended tail.
In addition to this, Tattletail is able to speak, respond, and react to the environment around him, almost appearing sentient in this way. The tuft of fur on the top of his head is able to be brushed, and he can also eat real food - said food goes into eggs that Tattletail is capable of laying, and these are left scattered all over the house. Occasionally he must also be recharged in order to keep functioning.
- While FNAF is a horror game, Tattletail is in another horror game.