Withered Chica

Chica's older model (also known as Withered Chica referred to in catalog as Chica the Chicken (Withered Version) ) makes an appearance in Five Nights at Freddy's 2, along with the three other older animatronics who have all fallen into severe disrepair. She is replaced by her newer counterpart for the "improved" Freddy Fazbear's Pizza, Toy Chica.

Appearance
Chica's older form has been massively changed, to the point where she barely resembles her original appearance. This is due to the attempted retrofit and subsequent abandonment of the older model, in favor of Toy Chica, according to Phone Guy on Night 2.

For a start, the feminine features have been toned down, and she appears more androgynous as a result, to contrast her more with Toy Chica. Her body seems to have minimal changes. Perhaps the most disturbing alterations are in the head area; Chica's eye sockets are now much larger than the eyes themselves, and she lacks eyebrows as well as her eyelids. If one looks really closely, her eyeballs appear to have nearly-visible blood-veins in grey color (which are better seen during her jumpscare). Furthermore, like in the first game, her iris are magenta in color. Like Foxy, her feet also have three talons, rather than two talons from the first game.

Her beak has been reshaped and turned into a jaw like Bonnie and Freddy Fazbear have, which appears to be completely unhinged. Her beak is also more pointed, like that of an actual chicken, and she has even more teeth on her upper and lower beak. The infamous second set of teeth from the animatronic itself is also clearly visible. She has two stumps where her hands used to be, with long wires pouring forth.

It also seems that she is unable to lower her arms down to her side for some reason, as every instance of her has them raised and stretched out as if she is "T-posed" (models in games with no animation are generally posed this way). However, as evidenced by her appearance in the Right Air Vent, she can still raise them up, but this may also be because the small space in the air vent is forcing her arms up.

The Cupcake
Although due to Chica lacking hands, she entirely lacks the Cupcake, so it is unknown what the older counterpart of Chica's Cupcake really looked like before the first/older version of the four animatronics fell into disrepair. Despite this, the Cupcake still appears as a plushie after completing the "Cupcake Challenge" from the Custom Night.

Behavior
Withered Chica will show up in the Main Hall, and climb into the Left Vent when you turn your flashlight off. When Withered Chica is in your office, put the Freddy head on a little bit after she appears. Wait about three seconds for Withered Chica to leave the office. Failure to put the head on during the right time will result in a death.