History VideoGame / KnucklesChaotix

* GameMod: A romhack exists that replaces Mighty the Armadillo with Sonic.

* DarkerAndEdgier: Not as a whole, but the final boss has a far more threatening character design than you would expect in a classic ''Sonic'' game. And if you fail to collect all the Chaos Rings, the Bad Ending [[spoiler:shows him ''floating above a city in flames'', implying he just burned the whole place down.]]

* BombardierMook: Bombbearers make their debut in this game, where they only drop their containers containing bombs if Knuckles and his friends kill them.

* SuddenDownerEnding: If you fail to collect all the Chaos Rings before defeating the FinalBoss, then you'll be treated to [[spoiler:the big demonic version of Metal Sonic hovering over a city wreathed in fire while creepy techno music plays]]. It comes out of nowhere and makes a stark contrast with the game's fun carnival theme.

** The final boss himself, having the most threatening character design seen in a classic ''Sonic'' game.

** At Marina Madness, Robotnik has a crystal-shaped barrier surrounding his whole ship, but after a while he reduces it to orbiting shards instead.

* YouDontLookLikeYou: The Pata-Batas from ''VideoGame/SonicTheHedgehogCD'' retain most of their design in the game, but have a gray bottom and 2 rotary engines, while being named [[DubNameChange Hoverby Mk II]], despite sharing the same Japanese name. ''Sonic IDW'' would eventually {{retcon}} it to Hoverby, which could also apply to the Badnik as a whole.

* DubInducedPlotHole: Despite being renamed Carnival Island in the US and the plot being centered on rescuing it on the day before opening day, the hub and introduction to each level still refers to the world as Newtrogic High Zone, and the day and night cycle changes go on for as long as you play and [[TakeYourTime no time limit is imposed on the player to beat the game.]] In addition, the whole deal with Knuckles being the guardian of Carnival Island contradicts his role as the guardian of Floating/Angel Island in the other games. The Chaos Rings are also unexplained in the Western story. Lastly, Knuckles' bio in the US manual mentions the "Emerald Pillar" from the Japanese manual's storyline.

''Knuckles' Chaotix'' (called just ''Chaotix'' in Japanese and the title screen) is a GaidenGame in the ''Franchise/SonicTheHedgehog'' franchise released for the UsefulNotes/Sega32X in 1995. It's the only Sonic game to appear on that system. Though mostly forgotten, the soundtrack has endured even amongst non-fans of the series, most notably the [[https://www.youtube.com/watch?v=GvV05M2kmzI "Door Into Summer"]] track. If you're a connoisseur of retro game [=OSTs=], you've probably been linked to that theme at least once. ''VideoGame/SonicGenerations'' uses a rearrangement of the song for one of its menus.

* DarkerAndEdgier: Not as a whole, but the final boss has a far more threatening character design than you would expect in a classic ''Sonic'' game. And if you fail to collect all Chaos Ring, the Bad Ending [[spoiler:shows him ''floating above a city in flames'', implying he just burned the whole place down.]]

* DownerEnding: The game's "Bad Ending" is perhaps one of the darkest moments in the series. [[spoiler:Metal Sonic survives and proceeds to set the island ablaze, presumably with everyone on it.]]

* AllThereInTheManual: The Japanese and Western storylines, neither of which really have much to do with the game itself, and the names of [[DubNameChange some]] enemies. The 2021 ''Sonic the Hedgehog Encyclo-speed-ia'' names more enemies that the manual [[NoNameGiven missed]].