* {{Blooper}}: In the game's good ending, Sonic's legs are mistakenly colored tan instead of their usual blue.
* BTeamSequel: Creator/SonicTeam had little involvement with the game, as they were working on ''VideoGame/NightsIntoDreams'' at the time, and it was developed by a different internal team within Creator/{{Sega}}.
* CreatorDrivenSuccessor: The game serves as a Sega 32X equivalent of the Sega CD's ''[[VideoGame/SonicTheHedgehogCD 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 TheDragon, and here he even takes over Sonic's place for the IdleAnimation EasterEgg. Even the same jump sound effect is used in both games, a filtered version of the ones heard in the main Genesis games.
* DummiedOut:
** Tails was meant to appear in the game, and is semi-playable in a few early builds of the game[[note]]he uses a glitched version of Knuckles' sprite, which is white with bright red eyes, but the flying mechanic works as intended[[/note]], 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.
* ExecutiveMeddling: 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.
* FirstAppearance: In spite of what one would think, this only applies to Espio, Heavy and Bomb. Of the rest: Mighty came from the game ''VideoGame/SegaSonicTheHedgehog'', Charmy from the [[Manga/SonicTheHedgehog manga series]] in Japan, and Vector... is an odd case as he's drawn from the early concept art of [[VideoGame/SonicTheHedgehog1 the first Sonic game]] but made a cameo in a Sonic Manga before his playable appearance here.
* FlipFlopOfGod: Sonic Team can't seem to decide on if the game is canon or not. When the Chaotix were brought back for ''VideoGame/SonicHeroes'', Iizuka stated in an [[https://info.sonicretro.org/Takashi_Iizuka_interview_by_EGM_(February_3,_2004) 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 CanonDiscontinuity. However later on, they have seemingly [[https://board.sonicstadium.org/topic/19847-segas-secret-sonic-bible-that-well-probably-never-see-to-mars/?page=10&tab=comments#comment-964735 recanted this]], and both ''VideoGame/SonicGenerations'' and ''VideoGame/SonicMania'' feature numerous references to the game, suggesting that it is canon. That said, [[WordOfSaintPaul according]] to Creator/IanFlynn on the Bumblekast, the Chaotix are considered to be "modern" characters by Sega and thus are off-limits from "classic"-era content (although classic Espio made a cameo in an Creator/{{IDW|Publishing}} [[Recap/SonicTheHedgehogIDW30thAnniversarySpecial comic]]), muddying the game's place in the canon. Eventually, ''WebAnimation/TailsTube'' would have Knuckles directly reference the events of ''Chaotix'' in episode 5, likely solidifying the game as being canon.
* KeepCirculatingTheTapes: 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.
* MarthDebutedInSmashBros: Mighty wasn't created for this game but western players would never know it because the game he's from, ''VideoGame/SegaSonicTheHedgehog'', was only available in Japanese arcades.
* MovedToTheNextConsole: 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 [[MediaNotes/The16bitEraOfConsoleVideoGames the 16-bit era]] was on its last legs.
* WhatCouldHaveBeen:
** 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 Crackers''[[note]]likely meant to be titled ''Sonic '''[[JapaneseRanguage Clackers]]''''', after [[https://en.wikipedia.org/wiki/Clackers the toy consisting of two balls connected by a string]][[/note]]. 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 WheelOFeet 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 ''[[CompilationRerelease 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 ADayInTheLimelight for Knuckles.
*** At one point in development, they were considering the DummiedOut 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 ''VideoGame/SegaSonicTheHedgehog''.
** To top it off, what became ''Knuckles' Chaotix'' was [[https://forums.sonicretro.org/index.php?threads/questions-for-tom-kalinske-president-and-ceo-of-sega-of-america-fr.32911/ originally]] going to be an actual successor to ''VideoGame/Sonic3AndKnuckles'' for the Platform/SegaSaturn. 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 DubNameChange for Mighty.
* WorkingTitle: Titled ''Knuckles' Ring Star'' in an early screenshot.
** The game prototype has a lot of [[BlindIdiotTranslation mistranslations, mainly of the title]], The prototype name ''Sonic Crackers'' was probably meant to be ''[[JapaneseRanguage 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''.
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