Editing Sonic the Hedgehog 2 (section)

==Trivia==
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TailsAnniversaryArtwork.jpg|Artwork by [[Yasushi Yamaguchi]] in conmmemoration of the 25th anniversary of ''Sonic 2''.
Sonic 2 Totoya art.jpg|Artwork by [[Yasushi Yamaguchi]] in conmmemoration of the 30th anniversary of ''Sonic 2''.
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*To celebrate the 25th anniversary of ''Sonic 2'', [[Yasushi Yamaguchi]] posted on Twitter a drawing of [[Miles "Tails" Prower|Tails]]. He also did the same in 2022 in conmmemoration of the same game's 30th anniversary.
* At one point, SoA considered having the soundtrack for ''Sonic 2'' composed entirely in-house by STI instead of rehiring Masato Nakamura, and several demo tracks were composed. However, SoJ outright rejected these demo tracks upon listening, ostensibly due to their poor quality. To date, only one of these unused demo songs, "Night Club Scene" by composer David Javelosa, is known to have survived. It has since been uploaded to the internet on Javelosa's YouTube channel.<ref>https://youtu.be/rJLkkOxRP8Y?si=prePIipCcIUqx09T</ref>
*This was the last Sonic game in the 90's to use the original ''Sonic The Hedgehog'' theme by [[Masato Nakamura]], due to him leaving the series and Sega having to pay royalties in order to use the song due to Nakamura owning the copyrights to the majority of the soundtracks for the first two ''Sonic'' games. The song was considered for use as the title theme for ''[[Sonic Spinball]]'', but it was hastily replaced with a new song very late in production when the development team discovered that Sega didn't own the rights to the song and did not wish to pay the royalties for it. The theme would not appear in a ''Sonic'' game again until the ''[[Sonic Advance]]'' games (via the Invincibility Theme), and again in ''[[Sonic the Hedgehog 4]]'' and ''[[Sonic Generations]]'' years later. However, an arrangement of the song was used for the opening of DiC's ''[[Adventures of Sonic the Hedgehog]]'' cartoon, and remained in use upon the series going into reruns.
*The original release of ''Sonic 2'' is notable for being the only game in the mainline ''Sonic'' series where Tails is completely incapable of flight when playable. Every subsequent playable appearance of Tails in a mainline ''Sonic'' game would give him some form of flight (discounting spinoffs in other genres such as ''[[Sonic Drift]]''). Both the 2013 remaster and ''[[Sonic Origins]]'' remaster of ''Sonic 2'' would retroactively give Tails the ability to fly as he could in subsequent games. Tails is also unable to swim in the original game, an ability that he would acquire in ''Sonic 3'', though this handicap was retained for his Game Gear appearances outside of power-ups or vehicles. Both the 2013 remaster and ''Origins'' remake would also likewise retroactively implement his ability to swim. 
*Due to the way memory is stored in the ''Sonic Classics'' cartridge release of ''Sonic 2'', none of the Game Genie codes for the initial cartridge releases of ''Sonic 2'' will work for that specific version of the game. A distinct set of codes is required instead. 
*Despite the Sega Master System/Game Gear version of ''Sonic 2'' predating the release of the console version of the game, Sega insists on recognizing the 16-bit game as the official debut of Tails, despite him appearing in the 8-bit release first. 
*Some believe  that the famous "Hidden Palace" theme (which can be heard in the games sound test, and plays if the level data is accessed via a Game Genie code)  was meant to be played during a cutscene at the end of the level (a major piece of evidence is that Masato Nakamura's demo tape of the song includes an ending that was not implemented into the in-game song, hinting towards its intended purpose).  When the level was reimplemented into the game in both the 2013 mobile port and ''Origins'' remake, the 2-Player theme for Mystic Cave Zone was used instead, as the development team felt the scrapped Hidden Palace song did not match the tone of the level.
*This is the only 2D ''[[Sonic the Hedgehog series|Sonic]]'' game where the player does not get a "Try Again" message after completing the game without collecting all Chaos Emeralds.
*In the second trailer for ''[[Sonic the Hedgehog 4: Episode I]]'', during the ''Sonic 2'' section, Sonic's running animation from the [[Sonic the Hedgehog 2 (Nick Arcade prototype)|Nick Arcade]] and [[Sonic the Hedgehog 2 (Simon Wai prototype)|Simon Wai]] prototypes is seen instead of the final version.
*Unlike in the original ''[[Sonic the Hedgehog (1991)|Sonic the Hedgehog]]'', [[Doctor Eggman|Dr. Eggman]]'s blue glasses are replaced with completely black eyes (can be mistaken for black glasses), in line with artwork of him in North America and Europe. This is probably the reason why the original ''Sonic the Hedgehog'' cartoons, and western ''Sonic'' media depicted him with black eyes. This is also seen in ''[[Sonic 3 & Knuckles]]'', but was corrected in ''[[Sonic Origins]]'' and its expansion ''[[Sonic Origins Plus]]'' respectively, while this game remained the same. Additionally, in the international key art, he is also seen with a large beard, which is nowhere to be seen in the actual game.
*Dr. Eggman's appearance on the said art can suggest a loose basis for his ''[[Adventures of Sonic the Hedgehog]]'' [[Doctor Ivo Robotnik (Adventures of Sonic the Hedgehog)|design]] hence the similarities of having sinister looking black eyes and an orange moustache.
*The western key art would also later be recreated for the third advertised poster for the ''[[Sonic the Hedgehog 2 (film)|Sonic the Hedgehog 2]]'' film produced by ''[[Paramount Pictures]]''. 
*This game was made the same year the ''Adventures of Sonic the Hedgehog'' [[Adventures of Sonic the Hedgehog pilot|pilot]] was made. However, the latter was produced before the former was released.
*This is the first main series game to have all seven [[Chaos Emerald]]s, therefore, debuting the [[super transformation]].
*The app icon for the initial iPhone version of ''Sonic 2'' uses recycled artwork from ''[[Sonic Advance 2]]''.
*Like its predecessor, the original cartridge release of ''Sonic The Hedgehog 2'' does not have an age rating, as it predates the creation of both Sega's short-lived VRC ([[Videogame Rating Council]]) and the ESRB rating system. Rereleases of the game would graft the ESRB's K-A (Kids To Adults) rating and it's successor (E for Everyone) onto it.
*On the back of the American ''Sonic 2'' box, the screenshot of Sonic and Tails in the [[Oil Ocean Zone]] is actually a pre-release version of this Zone. A switch can also be seen on the right side of the screenshot. When pressed, it would release a large ball from the floor and roll right into the ocean (as seen in the Simon Wai prototype). The switch and the ball did not appear in the final version of this Zone but can still be accessed in the Debug Mode. The screenshot of Aquatic Ruin Zone is also from a prototype version.
*In the North American instruction manual of ''Sonic 2'', page seven has a screenshot of the title screen from the Beta 4 prototype. On page 9, the screenshot of the Oil Ocean Zone is also in from a prototype. Its background is different from the final version (most notably, the silver silo in the background is on the right side in the screenshot, but it is located on the left side in the final version).
*Interestingly, the sprite of [[Super Sonic]] used for the Super and Extended Super achievements is in fact a fan-made ''[[Sonic Battle]]'' sprite from a sprite sheet made by JoeTE.