Hostility on the Set: In a case of sad irony, in 2018, Daniel Franzese, who played Derek Dvirko in Bully which was based off of the real-life murder of Bobby Kent who was killed due to his alleged bullying, revealed that co-star Bijou Phillips, who played Ali Willis, subjected him to a lot of homophobic and fat-shaming bullying while they were on the set, saying that she kept trying to goad him into admitting that he was gaynote which he later came out as over a decade later, but he just reluctantly said he was bisexual at the time to get her off his case and that she laughed at his appearance when he removed his shirt at a pool party and had even twisted one of his nipples. Even more troubling, he said the producers just looked the other way on the behavior (potentially due to the fact that she came from a famous family; her father was "Papa" John Phillips from The Mamas & the Papas and her older half-sisters were actress Mackenzie of One Day at a Time fame and singer Chynna of Wilson Phillips fame and he was just an up-and-coming actor) but said that his fellow co-stars Brad Renfro, Michael Pitt and Nick Stahl (who portrayed Kent himself) openly and repeatedly defended him and the latter, who was dating Phillips at the time, even tried to convince her to apologize to him.
Banned in China: Bully was banned in Brazil until 2016 for depicting school violence. This rule also affected the Steam edition.
Based on a True Story: The side mission "Character Sheets" was inspired by a real life event of head Bully producer Jeronimo Barerra, in which a bully stole some gaming books from a paraplegic friend of his and Barerra tried to retrieve the stolen good back.
Cowboy BeBop at His Computer: Immediately after the game was announced, Moral Guardians took to everywhere to try get the game cancelled. This was due to the belief that it would actually promote and justify school bullying at best (which it does not, although the title was what caused this stigma, to the point the game was given the title Canis Canem Edit in Transatlantic regions), or be a "Columbine simulator" at worst (while Jimmy can knock people out, murder is impossible). When the shock value died down, the game has since grown past the controversy.
Cross-Cast Role: Surprisingly, many of the black characters in the game were actually voiced by white actors. For example, Damon was voiced by Ben Curtis, while Bo was voiced by Jason Fuch. Even some of the white characters were voiced by black actors, with Tad's voice being Baron Vaughn and Christy's voice being the (biracial) Maine Anders.
Contrary to popular belief, the Boys Dorm is not a mirrored version of the Girls Dorm. Unlike the latter, none of the inaccessible rooms in the Boys Dorm were ever intended to be entered.
There's a popular rumor that Gary was originally going to have a Disney Villain Death at the end of the game, which was why he was so unresponsive after the boss fight, and that it was changed so that the game could keep its T rating. However, this was later revealed to be a hoax.
Shrug of God: Regarding the character Clint (aka Henry). Apparently, he managed to have two different names far enough into development that by the time the developers realized their error, it was easier to just credit him as "Clint (aka Henry)" than try to dummy out mentions of one of the names.
The game's graphic style was drastically different during development. Originally, the style was very cartoon-like and was heavily exaggerated. This is shown in the early designs for the Nerds (all of whom were stereotypical Gonks), the Greasers (with Peanut having an exaggerated pompadour and the beta Johnny obviously being inspired by Elvis Presley), Zoe (who originally had a skinbyrd hairstyle and much more shorter outfit), and other minor characters (the school's nurse barely looked human).
The Townies went through various changes. They were introduced as a punk-inspired clique early on, before being named the Dropouts, and ended up as the Townies. Three known members were Russell (who is still listed as the Dropouts leader in the game files), Zoe, and Sid. While Russell and Zoe were later developed into their own characters, Sid was scrapped entirely.
The Bullies clique as a whole originally wore blue vests. This was likely changed to not confuse players who would mistake them as being a friendly clique at the beginning of the game and foreshadow how they're the only clique who are completely loyal to Jimmy.
Bullworth Academy's uniform color was originally maroon rather than blue. In addition, almost all of the students in the beta wore the blue featured on Jimmy and Pete's uniforms that was eventually changed into green.
There was going to be an actual Grottoes and Gremlins minigame based on Gauntlet that was cut due to time constraints.
Dr. Crabblesnitch was originally going to have been the Big Bad of the game.
Gloria was originally one of the girls Jimmy could kiss. While her dialogue still remains in the game, it is Dummied Out, because Gloria is one of the younger kids in the game.
Unused dialogue for humiliating or giving female students swirlies exist.
There are unused dialogue for students tattling to prefects. The vast majority of them go unused as only six students in the game (the five little kids and Constantinos) tattle.
The Boys Dorm had a second floor that would have been where the bathroom and Gary and Pete's room was, alongside a staircase. In addition, many clique members could be seen at once instead of just Bullies, Nerds and non-cliques. Furthermore, both the Prefects and Mr. Burton would act as hall monitors. The mini-map thankfully still exists, alongside a few screenshots of what it would have looked like.
There is an unused sound effect for the Boys' Dorm (found here from 0:07-0:38) that appears to be a beta recording of the introduction cutscene for Pete, where Jimmy sounds very different and Pete makes a line about Jimmy's room being "in the room downstairs". According to Gerry Rosenthal, Jimmy's voice actor, he was the replacement of the voice actor who did the lines in the unused sound effect.
Prototype screenshots posted on character artist Jared Fry's blog show, among other things, character models for five of the female charactersnote Zoe, Lola, Mandy, Beatrice, and Pinky in nothing but underwear. While most of them aren't noteworthy beyond that, Beatrice's unused model is particularly jarring, with her wearing a small, lacy corset and a red thong. Interestingly enough, character models labeled "UW", presumably for "underwear", still exist in the game; however, these are simply their "pajamas" models in the final version, indicating that the original "underwear" models were overwritten fairly late in development.
Dummied Out voice clips suggest that Jealous Johnny was supposed to be a very different and much more risqué mission than what we ended up getting. While the mission that made it into the game is a fairly dull, uneventful affair in which Jimmy simply snaps a few photos of Gord and Lola together, the mission as it was originally designed involved tailing the pair all around town, including to a shack on the beach and Gord's house. It also involved a scene at the end where Lola would have stripped down to her underwear, with Gord trying to undo her bra, only for Lola to leave at that moment in the ultimate tease move. Considering that the game was already pushing its "T" rating, most of the mission content was likely scrapped so as not to risk tipping it over to an "M" rating.