* NoExportForYou: The game only received a very limited overseas release prior to its port in ''[[CompilationRerelease Sonic Gems Collection]]''. This changed though after [=Model2=] Collection's re-release on XboxLiveArcade and {{PlayStation Network}}.
* WhatCouldHaveBeen: There is a scrapped character called [[GuestFighter Honey the Cat]] (an anthropomorphismic version of Honey/Candy from ''VideoGame/FightingVipers'') as well as a full playable moveset for Dr. Robotnik that [[DummiedOut can both be found within the game's code]]. Also, ''Sonic the Fighters'' was originally meant to have a port for the UsefulNotes/SegaSaturn, but it was scrapped. Oh, and also Rocket Metal Sonic seen in the opening was supposed to be playable.
** This was later changed, as the Xbox LIVE Arcade and [=PlayStation Network=] re-release of the game features Metal Sonic, Dr. Eggman in his [[PoweredArmor mecha-armor]], and Honey the Cat as officially playable characters without the need of hacking. However, the other dummied out characters like Rocket Metal Sonic unfortunately remain unplayable.
** There is a hidden song named "Sunset Town," which apparently was supposed to be a stage in the original game, possibly for Honey the Cat. However, there are no models for the scrapped arena.
* This game is the second of two Classic Sonic appearances that Espio the Chameleon makes. His only other appearance was in ''VideoGame/KnucklesChaotix''. Curiously, the other Chaotix members are completely absent. The Japanese manual for ''Chaotix'' makes it clear that all the characters had their own individual agenda for going to the island, and thus not really a team. In light of that, it makes more sense that they'd act of their own accord afterwards. That was, however, {{retcon}}ned by ''VideoGame/SonicHeroes''.
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