Chica makes an appearance in Five Nights at Freddy's 2 along with the rest of the previous animatronics, who have all gone into disrepair.
Chica's form has been massively changed, to the point where she barely resembles her original appearance. This is due to the attemptedretrofit and subsequent abandonment of the old robot, in favor of the Toy version.
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. Furthermore, like in the first game, her eyes are magenta in color. 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 have, which appears to be completely unhinged. Her beak also is 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 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.
Unlike in the first game, Chica follows a set path. She will usually begin moving from Night 3 onward, but has a rare chance to make an appearance on Night 2. Chica starts with the other old animatronics in the Parts/Service room, moving to appear in Party Room 4 and then Party Room 2 to enter the Right Air Vent. While in the Right Air Vent, as Bonnie does, she completely bypasses the vent's blind spot and may enter The Office while the monitor is pulled up.
When she is in The Office and the player lowers their monitor, or when she forces it down, Chica will stand in front of the desk as the lights constantly flicker before she vanishes. The player must immediately put on the Freddy Fazbear Head the moment they see Chica to avoid imminent death. Delaying or neglecting to put the Head on will cause the screen to black out as normal, only for her to return and kill the player after bringing up and lowering the Monitor or taking off the Freddy Head. She may also forcibly pull down the Monitor or remove the Head if left on some time after failing to ward her off.