BB is the first animatronic in the series who speaks in full words, with a non-distorted human voice.
All of BB's original sound files without the echo effect are taken from SoundDogs.[1][2][3]
In his first debut in the second game, BB is the first animatronic in the series who doesn't directly attack or jumpscare the protagonist. However, he is finally capable to attack in Five Nights at Freddy's AR: Special Delivery.
In a few of BB's renders, the light reflection causes his buttons to appear as grey or white, reflecting by the light. This led to many of his merchandise wrongfully coloring them.
There is some unused audio of Balloon Boy saying "Bye Bye", which possibly mean't he was going to have a less irritating role in some of the main games.
When he is in the Left Air Vent, the balloon and sign he holds disappear. He appears to somehow retrieve them when he comes into the Office.
BB is one out of the two animatronics introduced in the second game whose eyes never change to glossy-black, with the other being Toy Bonnie.
However, there is a rare chance that upon death, Toy Bonnie's eyeless screen is seen, making BB the only new animatronic to bear their real eyes all the time.
Furthermore, if one takes in account the similar eyeless screens of Withered Freddy and Withered Foxy in the same game as well as the Night 3 cutscene, in which Withered Bonnie and Withered Chica appear to have no eyes, BB is the only one of all the antagonists to always have intact, human-like eyeballs.
In fact, no part of BB's endoskeleton is ever seen.
It is possible that BB's constant giggling and talking lures the newer animatronics into the Office since Phone Guy mentions that they are attracted by noises and move toward where the people are.
BB is the only animatronic that doesn't appear anywhere in the death minigames.
BB is one of four animatronics who do not appear in the hallway before entering the Office, with the others being Toy Bonnie, the Puppet, and Withered Chica.
BB, Withered Freddy, Toy Freddy, and Withered Foxy are the only animatronics to return to their starting locations during the night.
BB's figurine (obtained by beating Night 7's "Night of Misfits" preset) shows him with a round, red nose that reaches his eyes, instead of his small, triangular nose.
BB is one of only two animatronics to be featured as an unlockable figurine (as opposed to a plushie) that is awarded to the player after completing a specific Custom Night preset. The other being Toy Bonnie.
When BB is in the Office, while Withered Bonnie, Withered Chica, Toy Freddy, or Withered Freddy is in the Office at the same time, he cannot be seen. However, his laugh can be heard.
Golden Freddy and BB can be seen in the Office together on rare occasions.
Similar to the toy animatronics, BB was scrapped at the end of Night 6 due to possible malfunctioning.
BB is the only animatronic not mentioned by Phone Guy.
Some members of the community have compared Balloon Boy to the Villager from the Animal Crossing series, specifically his Super Smash Bros. incarnation. Both have a similar appearance (small, large round head with triangular nose, stubby arms with spherical hands) and both attack in a more indirect way, compared to the other characters, that includes the usage of balloons.
His laugh is sometimes audible when he isn't moving.
It is unknown how BB actually causes problems with the lights.
BB and Toy Freddy are the only two animatronics who only appear in one camera feed in the trail from their starting position to the Office, being the Left Air Vent and Game Area, respectively.
BB can leave the Game Area and the Left Air Vent without causing a static error.
The same is also true for Withered Foxy.
BB is one of five animatronics to not be seen in a party room, the others being Toy Freddy, Withered Foxy, the Puppet, and Golden Freddy.
When Toy Bonnie enters the Office, BB appears to momentarily disappear and reappear after he leaves.
While he cannot be seen on cameras, BB's theoretical movement pattern is the following: Game Area > Main Hall > Party Room 3 > Party Room 1 > Left Air Vent > Office.
Errors[]
BB's hand clips through his sleeve while he is in the Left Air Vent's blind spot.
His hip also clips into the floor while he is in the Left Air Vent's blind spot.
From the "BB's Air Adventure" minigame, there are three silhouetted BBs streaming with grey tears. If the sprite was brightened and saturated two times, it appears to be brilliant blue in color while the tears are white. This is also true for Shadow Bonnie (from the end-of-night minigame after completing Night 4), a Puppet-resembled figure (from "Mangle's Quest" minigame), and dark-looking cupcakes (from "Chica's Party" minigame and the end-of-night minigame after completing Night 2).
It is unknown if the BB the player controls in the minigame is the real BB or just a manifestation. The same is true for all of the minigame characters the player controls.
BB can now be seen with his balloon and sign when in the vent. He also can be seen running through the office to the hallway when the player wards him off with the Freddy mask.
BB's eyelids appear purple, but all other appearances of him have tan eyelids.
BB was originally legitimately going to get a jumpscare, however this was scrapped.
Eventually, he gets his jumpscare in Five Nights at Freddy's AR: Special Delivery.
BB is one of three characters to receive a jumpscare after lacking one in previous appearances. The other two are Endo-01 and RWQFSFASXC.
One of BB's dialogues while roaming outside the player's location is when he asks the player to help him "become a real boy". This is a reference to Pinocchio, a living puppet who wishes to become a real boy.
BB's previously unused haywire sound was officially added on July 23, 2020.
Unlike the other toy animatronics, BB is not required with the Freddy Fazbear Head.
