Shadow Bonnie, also known as RWQFSFASXC or simply RXQ, is Toy Boonie's mysterious shadow counterpart, first appeared in the Easter eggs of Five Nights at Freddy's 2 and in subsequent games. RWQFSFASXC is a shaded silhouette version of Toy Bonnie with white eyes and teeth. He appears to have a full set of visible teeth, as opposed to Toy Bonnie's buck teeth, with an extra pair of teeth on top. He also appears to be shorter, and his torso and pelvis are more clearly defined. It is not clear whether these differences are in any way related. Aside from being mysterious and slightly ominous, nothing can describe RWQFSFASXC's personality.

Spring Bonnie, occasionally spelled Springbonnie, was the earliest iteration of Bonnie and was an entertainer in Fredbear's Family Diner, along with the diner's mascot Fredbear. They made their debut in Five Nights at Freddy's 3. They later became Golden Freddy and Springtrap respectively. The two cartoons are the only ones known to be equipped with "snap locks," mechanical devices attached to the character suit's endoskeleton that can be retracted with a hand crank, allowing the suit to be worn by humans. However, snap locks had a fatal flaw, and that was their high sensitivity to water, as a single drop was enough to cause the entire system to contract, crushing anyone wearing the suit at the time. The last time it was used was by Afton to hide from his past victims, but the flawed mechanism malfunctioned, causing the compressed endoskeleton to pierce from the inside and kill Afton. Although dead, Afton will return in a few decades, his soul fused with Spring Bonnie animatronics to become Springtrap.

Nightmare Bonnie is a Nightmare variant of Bonnie that first appeared in Five Nights at Freddy's 4. Nightmare Bonnie is a blue-purple run-down animatronic bunny. Many of his features are exaggerated beyond reality, such as his sharp teeth, prominent jaw, and claws. Certain parts of him have lighter shades of purple, such as his muzzle, chin, inner ear, and abdomen. A large tear ran from his upper body to his hip, almost completely exposing the underlying endoskeleton. Like all other nightmares, Nightmare Bonnie's head appears to be split in two for unknown reasons, causing him to open his jaw. He has two sharp teeth. Most of the material around his eyes disappeared completely. His ears were bent at steep angles, and there were multiple tear marks on them. Nightmare Bonnie is portrayed as a cruel and menacing animatronic who only wants to hurt his victims, making him the exact opposite of his original character, Bonnie.

Jack-O-Bonnie is a Halloween-themed revamped variant of Nightmare Bonnie, first appeared in Five Nights at Freddy's 4, where she replaces the original villain in the Halloween edition. Aside from the Halloween-themed colors, his appearance looks identical to his original variant. Jack-O-Bonnie is not blue-violet, but brown-orange. His muzzle, chin, abdomen, and the inside of his ears were dyed orange-red. In place of his normal endoskeleton eyes, the eye sockets glow orange and yellow like a real jack-o-lantern. His teeth glow yellowish, allowing his endoskeleton jaw to glow in low light. Similar effects appear to have been applied to his entire body in shiny yellow as they can be seen on the torso and some endoskeletal parts. Several parts of Jack-O-Bonnie's left hand look green instead of brown-orange. Like his original counterpart and other nightmare animatronics, Jack-O-Bonnie is a ruthless, intimidating creature who hunts down his victims like a predatory beast.

Rockstar Bonnie is another redesigned version of the original Bonnie, first seen in Freddy Fazbear's Pizzeria Simulator. His cheeks, eyelids, and knees were magenta. He has green eyes, a brighter red bow tie, and two gold star buttons on his chest. Like other "rock star" animatronics, his head and jaw appear to be separated, with buck teeth under the muzzle and more teeth in the lower jaw. He plays a red/orange electric guitar with two straps. Rockstar Bonnie also often has a tendency to be clumsy, as he occasionally loses his guitar and needs the player to find it, which suggests he's clumsy, and his lack of knowledge about not remembering where he lost his guitar may also suggest that he's a bit lazy and selfish.

Glamrock Bonnie is one of the revamped punk rock-themed characters from Freddy Fazbear's Mega Pizzaplex, first appearing in Five Nights at Freddy's: Security Breach. Glamrock animatronics features more anthropomorphic designs than previous characters and wears punk accessories with an '80s theme, namely face paint, oversized shoulder pads, slightly spiked bracelets, and other types of jewelry. Their technology seems relatively advanced as they are able to move freely (unlike typical animatronics which can only move in a fixed pattern) and everyone seems to have very advanced artificial intelligence and self-awareness as they are able to hold and start without being fixed Reply to the conversation with almost complete free will. Glamrock Bonnie is animatronic that appears in Freddy Fazbear's Mega Pizzaplex sometime before the game begins. For unknown reasons, he was retired and replaced by Montgomery Gator. According to employee logs, many kids asked where Bonnie was, which led Pizzaplex employees to consider removing references to Bonnie from that location, including his bowling alley. In a security report log, it is said that Bonnie was last seen entering the Gator Golf course. One of many theories speculates that Bonnie was destroyed by the Montgomery Gator, most likely due to Monty's aggression.

Chica, one of the four main antagonists in Five Nights at Freddy's, is an animatronic chicken and kid entertainer who lives at Freddy Fazbear's Pizzeria with Freddy Fazbear and Bonnie. When the first Freddy Fazbear's Pizza opened in 1983, she was a backup singer. In 1987, both she and the original animatronics were in serious disrepair, and Chica was replaced by the new villain of her "improved" Freddy Fazbear's Pizza, Toy Chica. Chica is a bright yellow animatronic chicken with a spherical head, orange beak, magenta eyes, and black eyebrows. There are three "clusters" of feathers on the top of her head. She has two claws on her orange feet. She wears a white bib with "Let's Eat!!!" yellow bubble letters, outlined in purple, a tri-color triangle dotted with three patterns on the bib, and what appears to be a tiny stylized pizza piece. Mr. Cupcake is an object-like character from a tray carried by Chica with her left hand. It has pink frosting with two large yellow eyes, a yellow-striped birthday candle with a vinyl candle-light, buck teeth, no wrapper, and, like other animatronics, has black eyelids.

Toy Chica is the re-designed counterpart of Chica in the past, first appearing in Five Nights at Freddy's 2. Toy Chica served as a backup singer at the newly renovated 1987 Freddy Fazbear's Pizza. The pizzeria was closed after only a few short weeks, and Toy Chica and other toy animatronics were scrapped due to possible malfunctions. Unlike the original Chica, the toy Chica has a distinctly curved body, rather than the simple round and oval shape of the original Chica. Like the original Chica, the Toy Chica has a bib. However, her bib says "LET'S PARTY!" instead of "LET'S EAT!!!" Toy Chica presents a typical female character. She is an orange-yellow chicken with an orange beak, blue eyes, purple eyelids, long eyelashes, and orange feet. She has a few stray "feathers" on top of her head. Her cheeks are flushed, just like other toy animations, although her face is pink instead of red. Toy Cupcake is Cupcake's toy counterpart, smaller in size, with a different style of birthday candles and blue eyes instead of yellow. It also lacks the teeth of its original counterpart.

Phantom Chica is an illusion of a burned and damaged Chica that first appeared in Five Nights at Freddy's 3. Phantom Chica is basically the same model as Chica in Five Nights at Freddy's, but instead of eyes, she has white, needle-piercing pupils, similar to Springtrap and other Phantoms. She also appears to be charred or burnt, possibly foreshadowing the burning of the attraction. Phantom Chika also seems to keep her mouth open, even when performing her jump scare. Her hands appear to be different from the original opponent; the original opponent had normal fingers, while Phantom Chica's hand looks like a pair of mittens, with the fingers fused together and the thumbs separated. It's easier to notice in her bright images, but it's probably just a result of the striped texture mixing her fingers together.

Nightmare Chica is a Nightmare variant of Chica, a heavily deteriorated and extensively modified version of the original Chica animatronics, which first appeared in Five Nights at Freddy's 4. While the damage to her upper body was relatively minor, the lower body of her suit had been completely severed from her hips. The bottom of her bib tapers, almost completely to pieces. Instead of orange feet, Nightmare Chica's calves are completely painted orange, and her kneecaps appear to be missing. Most of her toes were covered in black paint as if the color had been chipped away. Her beak is also covered with long, sharp teeth with green roots. The Nightmare Cupcakes have been transformed with sharp teeth and appear to be autonomous. Its eyes are orange with glowing white pupils. Its pink frosting is slightly darker in color. The candle holder is light brown with a large vinyl candle.

Jack-O-Chica is a Halloween-themed revamped variant of Nightmare Chica, first appearing in Five Nights at Freddy's 4, where she replaces the original antagonist in the Halloween version. She is also shown to have a vengeful, yet mocking disposition. Her voice is low-pitched and edited with television-like static noises. The first notable difference is that her color scheme is completely orange in the Halloween style. Her complexion was dark golden rather than yellow. In place of her normal endoskeleton eyes, the sockets are very bright orange, much like a jack-o'-lantern. A similar effect appears to have occurred on Jack-O-Chica's entire body, as it can be seen very commonly around her shoulder sockets and drains out of her stomach. Her endoskeleton head is completely absent, while her endoskeleton teeth remain. A large green jack-o-lantern replaces the Cupcakes at Nightmare Chica. Her bib is the only feature that remains the same.

Funtime Chica, the counterpart to the original animatronic Chica, first appeared in Freddy Fazbear's Pizzeria Simulator. Funtime Chica looks similar to Toy Chica. She still has orange calves, pink areas, Chica-like feet, and an orange waist. She has a built-in speaker, just like Funtime Freddy and Funtime Foxy, located in her abdomen. A plate on her pink upper body was missing. Like other funny animatronics, she has five fingers instead of the cartoony four that normal animatronics have. Her fingertips are orange, and she has pink rosy cheeks and eyebrows. Funtime Chica also has purple eyes with long eyelashes and pink lipstick-like markings on the beak. Unlike most other versions of Chica, Funtime Chica is attractive and vain.