[[caption-width-right:320:It's Knuckles, in his ''own game''!]]

''Knuckles' Chaotix'' (simply known as ''Chaotix'' in Japan) is an action-platform game in the popular ''Franchise/SonicTheHedgehog'' franchise, released for the [[UsefulNotes/OtherSegaSystems Sega 32X]] in 1995, and the only ''Sonic'' game to appear on that system.

[[AllThereInTheManual There are two completely different storylines depending on the instruction manual.]] In western versions: Knuckles the Echidna is the guardian of Carnival Island, a high-tech amusement resort, but [[DubNameChange Dr. Robotnik]] has deigns on the island's Emerald Pillar, which houses the Power Emerald that supplies the island's electricity. Robotnik has trapped four of Knuckles' friends in the Combi Confiner, so it's up to Knuckles to save the day before the grand opening, reuniting the Chaotix Crew with the real ring power of teamwork. In the Japanese version: [[DubNameChange Dr. Eggman]] discovers a mysterious island containing artifacts known as Chaos Rings - magic rings infused with Chaos Emerald energy - and built his base (dubbed the Newtrogic High Zone) there. Mighty the Armadillo, Espio the Chameleon, Charmy Bee, and Vector the Crocodile, all arrived at around the same time for their own reasons, but were captured by Eggman and placed in his "Combi Catcher" machine to avoid interfering with his plans. Knuckles, curious about the island, ventures there as well to find out more about the Chaos Rings and their connection to the Floating Island.

The game is played with two characters, joined together by an elastic ring (with the cord shown as a trail of sparkles). Before each stage, you use the Combi Catcher to randomly select your partner, and then select a stage (also at random; how fast the stage select indicator moves depends on what day cycle you're currently on), progressing through it in normal ''Sonic'' fashion, defeating Dr. Robotnik's robots and reaching the giant ring at the end of the stage. A great deal of cooperation is required to make it through the game, as you have to make use of the properties of the elastic rings you and your partner hold in order to zoom and slingshot your way past obstacles.

!! Tropes used in ''Knuckles' Chaotix'':
* AlliterativeName: The levels: Botanic Base, Speed Slider, Amazing Arena, Marina Madness and Techno Tower.
* AmusementParkOfDoom: The entire game except for the Isolated Island levels is set on one.
* BackgroundBoss: The second phase of the final boss.
* BottomlessPits: Averted during the normal stages. Since there are almost always two characters on the field at one time, stages are deliberately designed to keep this from happening. The Special Stages, however, are prone to this.
* BulletproofHumanShield: Partners can be used for this purpose, as they only lose one ring when hit instead of all of them (unless your partner is Bomb, who explodes when hit, causing you to lose all of your rings if you're within its blast radius).
* CanonDiscontinuity: Suggested to be the case since WordOfGod [[http://info.sonicretro.org/Takashi_Iizuka_interview_by_EGM_(February_3,_2004) says that the Chaotix were re-imagined for]] ''VideoGame/SonicHeroes'', not re-appearing. Also referenced in VideoGame/SonicGenerations, which has Mighty's last appearance at 1993. Which is strange when you realize that two of this game's songs are in that game. Certain profiles still acknowledge the existence of ''Knuckles' Chaotix'', however.
* CanonImmigrant: Espio, [[http://sost.emulationzone.org/chaotix/titlescreen/index.htm who may have been originally supposed to be the main character]] made his debut here before making appearances in other media. Mighty the Armadillo is a Canon ''Emigrant'', having first appeared in ''VideoGame/SegaSonicTheHedgehog''.
** Vector was supposed to have first appeared in the SoundTest from ''Sonic 1'', as part of Sonic's band. While the idea was discarded, he got to make a [[http://manga.portalsonic.com/index.php?date=2010-06-29 cameo]] in the very first Sonic manga, in 1991. As for Charmy Bee, he first appeared in [[http://manga.portalsonic.com/index.php?date=2010-11-25 another]] Sonic manga at around 1992.
* {{Cap}}:
** The game has a cap of 255 rings instead of 999. Then any other rings collected are turned into points.
** There is a cap the other way as well. You can get as low as -99 rings. Anything below that and you are sent back to the attractions screen. You lose rings by calling your partner. You are sent back to the attractions screen if hit while alone and with anything under 0 rings.
** Also, you can only take 200 rings into a Special Stage. Anything above that is simply lost.
* CaptainErsatz: Mighty the Armadillo is literally just an edited Sonic sprite. Which makes the appearance of Sonic in the ending pretty strange.
* CircusOfFear: The "Speed Slider" level. It's more like a cheery roller coaster, but CreepyCircusMusic plays during the merry-go-round boss battle.
* ColorContrast: Avoided; the game really tried hard to show off the 32,000+ colors of the 32x, and the result is a garish game with all the colors of the rainbow spread out and cranked up to neon brightness, although it does fit in with the carnival theme.
* ComicBookAdaptation: In both [[Comicbook/ArchieComicsSonicTheHedgehog Archie comic]] (as a 48-page special) and ''ComicBook/SonicTheComic'' (as a five-part serial).
** And the characters became regulars for a long while, in comparison to the many years before their [[VideoGame/SonicHeroes next appearance]].
* CreditsMedley: The only non-main line Sonic game with one.
* DemotedToExtra: Sonic himself does not appear at all in the main game, being replaced by Mighty; he and Tails only get a cameo in the games good ending. According to a former Sega staffer, Sega of Japan felt the 32x and the game would be a flop because of the bonding mechanism, and were afraid that having Sonic as the games star would hurt the series brand image, so they made Knuckles the main character instead of cancelling the game altogether.
* DummiedOut: Tails. Also, sprites of him in the Tornado, and Super Sonic have been found within the ROM.
** 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.
* EasterEgg: Amy in the sound test menu.
* EternalEngine: The "Techno Tower" level.
* {{Flight}}: Instead of Spin Dashing, Charmy does this to get around. It is a complete and utter GameBreaker, since unlike Tails he has no "cooldown" period.
** However, Charmy can't jump in the traditional sense, so he takes a bit of getting used to. But yes. If you want a ridiculously easy game experience, wait until you get to Techno Tower, which can be done in less than a minute with Charmy.
* GiantSpaceFleaFromNowhere: At the end, Robotnik and Metal Sonic are defeated and fly off together into the background... and a [[OneWingedAngel gigantic snarling red demonic version of Metal Sonic]] suddenly rises into the screen and proceeds to try to smash and blast you into paste. [[BrokenBase Fans and comic creators alike are torn on whether or not this is supposed to be Metal Sonic himself, since the game isn't clear.]]
* GoldenEnding: Accessible only if you've collected all of the Chaos Rings. If you miss one, you get the bad ending where Robotnik's giant robot destroys the island.
* HubLevel: The Newtrogic High Zone where each character appears after exiting a stage. The next stage played is selected off of a roulette style game.
** NoEnding / {{A Winner Is You}}: [[spoiler:The good ending is just the title screen with Sonic and Tails in the background. Even the bad ending is better.]]
* IdleAnimation: Every character has one...
** EasterEgg: ...And if you leave them idle for a minute, [[spoiler:Metal Sonic shows up and shoots at you.]]
* InUniverseGameClock: The game has a Day and Night system that changes as you enter and leave each level.
* JokeCharacter: Heavy the Robot and Bomb.
* JungleJapes: Botanic Base which is also the most natural setting in the game.
* LastChanceHitPoint: Upon taking a hit at zero rings, you will first lose your partner for a while instead of dying.
* LethalJokeCharacter: Heavy the Robot is completely indestructible. In fact, he can open monitors and destroy enemies just by walking into them. You could pretty much pick him up and run around with reckless abandon while holding him in front of you, barely suffering any damage. Taken into better effect if you break a monitor that's showing him, or -- more permanently -- select him as your player character through the debug menu.
* LoadsAndLoadsOfCharacters: For a Sonic-based platformer of its time. To be specific, ''VideoGame/{{Sonic the Hedgehog|1}}'' had only two main characters. ''VideoGame/SonicTheHedgehog2'' had three[[note]]four if you count Mecha Sonic[[/note]], and ''[[VideoGame/Sonic3AndKnuckles Sonic 3 & Knuckles]]'' had four characters[[note]]six if counting Mecha Sonic and [=EggRobo=], and nineteen if counting all the sub-bosses[[/note]]. ''VideoGame/SonicTheHedgehogCD'' had three[[note]]five if counting Metal Sonic and Tails' cameo[[/note]]. ''Knuckles' Chaotix'' has six[[note]]nine if counting Metal Sonic, Heavy and Bomb, and also making eleven if counting Sonic and Tails at the Good Ending and twelve if counting Amy's CheatCode cameo in the SoundTest.[[/note]]
* LongSongShortScene: The ending scene music, Tribute. The scene it plays along(Which just shows how many Chaos Rings you have) runs no longer than fifteen seconds at best, but the track is a minute long. Really a shame too, as it's a very nice track and would have been very appropiate...[[NoEnding had there been an actual ending...]]
%%* MightyGlacier: Heavy the Robot. He's incredibly slow, but invincible.
* MissingSecret: The screenshot shown in the manual depicting the island as a peaceful paradise is nowhere to be found in the game.
* [[TheMole The Moles]]: Heavy the Robot and Bomb are implied to be this.
* NoobCave: The "Isolated Island" level. There are no enemies or traps, and it's basically you and your partner running wild until you reach the goal.
* SpiritualSuccessor: 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, the Robot Mosquito and remodeled versions of the 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.
* TacticalSuicideBoss:
** At Marina Madness, Eggman has a crystal-shaped barrier surrounding his whole ship, but after a while he reduces it to orbiting shards instead.
** Instead of personally fighting the heroes, Metal Sonic acts as a battery to the former level select machine that now deploys hazards on them. It just happens that one of the machine's functions is to self-destruct.
* TeamworkPuzzleGame: The whole elastic-ring thing.
* TornadoMove: Espio.
* WallJump: Mighty and Espio.