- B-Team Sequel: Sonic Team had little involvement with the game and it was developed by a different internal team within Sega.
- Creator-Driven Successor: The game serves as a Sega 32X equivalent of the Sega CD's Sonic CD. The game's levels, songs, and general style have a similar feeling to Sonic CD. A couple graphics and sounds from that game are also reused here. On the subject of reused Badniks, Mosqui (Robot Mosquito) and remodeled versions of Pata-Bata (Robot Butterfly) from Palmtree Panic appear in Speed Slider as Needlenose and Hoverby Mk II. Also, both games feature Metal Sonic as The Dragon, and here he even takes over Sonic's place for the Idle Animation Easter Egg. Even the same jump sound effect is used in both games, a filtered version of the ones heard in the main Genesis games.
- Dummied Out:
- Tails was meant to appear in the game, and is semi-playable in a few early builds of the gamenote , but selecting him crashes the game in the final version. Also, sprites of him in the Tornado as well as Super Sonic have been found within the ROM.
- Sonic was going to be in the game as well, before being replaced with Mighty.
- Heavy and Bomb were meant to be normally selectable as primary playable characters, under the names "Heavy the Mechanic" and "Bomb the Mechanic" (they are also labelled "Robotnik's Mechanix" in the manual). This can be re-enabled with a cheat device.
- Executive Meddling: The whole reason the game gave Knuckles the spotlight and replaced Sonic with Mighty the Armadillo was because Sega of Japan rightfully feared that the 32X (and thus the Sonic game being made for it) would be a flop, and didn't want to give Sonic top billing out of fear that it would hurt the series brand image if the game tanked.
- First Appearance: In spite of what one would think, this only applies to Espio, Heavy and Bomb. Of the rest: Mighty came from the game SegaSonic the Hedgehog, Charmy from the manga series in Japan, and Vector... is an odd case as he's drawn from the early concept art of the first Sonic game but made a cameo in a Sonic Manga before his playable appearance here.
- Flip-Flop of God: Sonic Team can't seem to decide on if the game is canon or not. When the Chaotix were brought back for Sonic Heroes, Iizuka stated in an interview that they were being reimagined, not reappearing, which combined with Heroes not acknowledging Knuckles' Chaotix and generally treating Team Chaotix as if they’re new characters, on top of their characterizations differing from Knuckles' Chaotix's, suggests the game has fallen into Canon Discontinuity. However later on, they have seemingly recanted this, and both Sonic Generations and Sonic Mania feature numerous references to the game, suggesting that it is canon. That said, according to Ian Flynn on the Bumblekast, the Chaotix are considered to be "modern" characters by Sega (although the classic form of Espio made a cameo in an IDW comic), muddying the game's place in the canon.
- Keep Circulating the Tapes: The game has never seen a re-release outside of GameTap for a brief period, and it's unlikely to get another one anytime soon. Its entire soundtrack appears as DLC in Sonic Origins, but that's as far as the game goes to include this one.
- Marth Debuted in "Smash Bros.": Mighty wasn't created for this game but western players would never know it because the game he's from, SegaSonic the Hedgehog, was only available in Japanese arcades.
- Moved to the Next Console: Well, more like "Moved to the Add-On", but nevertheless. The game initially started development as a Genesis title, but shifted to the 32X after Sega realized that the 16-bit era was on its last legs.
- What Could Have Been:
- An early story idea involved Sonic and his friends trying to escape from Dr. Robotnik's prison chained to a selected partner. This idea was scrapped early on.
- There is evidence Chaotix evolved from the scrapped prototype Sonic Crackersnote . More specifically, the ring tether mechanic was present in a working form and the animations used for Mighty are very clearly drawn over Sonic's animations from the Crackers proof-of-concept (he even has the same Wheel o' Feet effect despite his primary character trait being his strength). Furthermore, the level music from Sonic Crackers became the game's theme.
- If you get hit several times in a row in Crackers, your character becomes stunned for a while. Similarly to the slamming-on-walls quirk from the Sonic 2 prototypes, this was cut from the game, though very similar dazed sprite animations for the character do exist in Chaotix.
- It was originally going to be included in Sonic Gems Collection at one point, but was dropped, probably because of issues emulating the 32X. However, an entire mini-gallery of art from the game was included in the Museum.
- One early screenshot of the title screen implied that Espio was supposed to be the main character or a major player of the game, with Knuckles just tagging along. He's given top billing in an early title screen, and the opening graphics to each level still put Espio's name over Knuckles in the final game.
- Other staple mechanics from the Sonic series were intended at points in development. Data and artwork for loop de loops and water areas still exist in the final game but were left unfinished (a likely explanation for the game's more limited level designs).
- As mentioned above, glitched versions of what seem to be Tails exist in prototypes of the game. Mighty's blatantly tweaked sprites from Sonic's Crackers art suggest both characters were intended to be playable early on before making it at A Day in the Limelight for Knuckles.
- At one point in development, they were considering the Dummied Out character called "*********" by the game to be replaced by a new character named Max the Parrot seen in some concept art, as well as possibly Ray the Flying Squirrel from SegaSonic the Hedgehog.
- To top it off, what became Knuckles' Chaotix was originally going to be an actual successor to Sonic 3 & Knuckles for the Sega Saturn. According to former Sega of America CEO Tom Kalinske, the decision to move the game to the 32X was made both to expand the add-on's library and because "[it was] too big, it was taking too long, it was over budgeted, it was behind schedule."
- According to early screenshots, "Nat the Armadillo" was an unused Dub Name Change for Mighty.
- Working Title: Titled Knuckles' Ring Star in an early screenshot.
- The game prototype has a lot of mistranslations, mainly of the title, The prototype name Sonic Crackers was probably meant to be Sonic Clackers after the clacker toy the link system resembles, but confusingly the ROM header name for the prototype is Sonic Studium which is assumed to be a mistranslation of Sonic Stadium.
Trivia / Knuckles' Chaotix