''Stay Sonic'' is a 1993 guidebook to ''Franchise/SonicTheHedgehog''. It is based on Sega of Europe's interpretation of the series.

''Stay Sonic'' features a history section based on the backstory given in the American comic ''ComicBook/SonicTheHedgehogPromoComic''. Both come from Sega of America's internal "[[Script/SonicTheHedgehogBible Sonic Bible]]" documents. This backstory was dropped in American media such as ''WesternAnimation/SonicTheHedgehogSatAM'' and ''ComicBook/SonicTheHedgehogArchieComics'' except for Sally Acorn and was never canon in Japan, but it used extensively in European media until ''VideoGame/SonicAdventure''.

''Sonic Says'' also includes various other tidbite such as a ''Sonic'' quiz, a diagram of Robotnik's Eggmobile, descriptions of the badniks of ''VideoGame/SonicTheHedgehog2'', and tips on how to play the game.

Nigel Kitching, one of the lead writers of Fleetway's ''ComicBook/SonicTheComic'', owned a copy of ''Stay Sonic'' and used it as a basis for the lore of the comic.

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!!''Sonic Says'' contains examples of:
* AbsentMindedProfessor: Dr Ovi Kintobor, while a genius, is so absorbed in his work that he forgot to go shopping. In the laboratory fridge, Sonic finds a six month old egg. Distracted, the good doctor trips over a wire...
* AnotherDimension: The Planet Mobius is revealed to exist in a parallel universe.
* BigEater: Sonic has a large appetite for fast food.
* {{Bowdlerization}}: The original document was grimmer:
** Sonic's father dies by falling into toxic waste.
** Sonic is mentioned as being extremely poor.
** He is almost non-morphic in this story, [[ComicBook/SonicTheHedgehogPromoComic rather than simply brown.]]
** Hibernation is important to the plot.
* CreateYourOwnVillain: Dr. Kintobor was a benevolent scientist until an accident, caused by Sonic distracting him, turned him evil.
* EarlyAdaptationWeirdness: It features many differences from later canon, such as Sonic and Robotnik having been friends once. As well as Ivo Robotnik originally being named "[[SdrawkcabName Ovi Kintobor]]".
* EarthDrift: Inverted.
* FantasticScience: Tails can fly because he has double joints where his tails join his spine.
* FaceHeelTurn: Dr. Robotnik was originally a kindly scientist but a freak accident turned him the way he is.
* FriendToAllLivingThings: Dr Kintobor, in attempt to rid the planet Mobius of evil, undertook a worldwide quest for the Chaos Emeralds, thereby to contain it.
* IntergenerationalFriendship: Middle-aged academic Dr Ovi Kintobor and easy-going, adventurous young Sonic.
* JekyllAndHyde: When Dr Kintobor tripped over a wire connected to the ROCC, the evil contained within the Chaos Emeralds turned him into a tyrannical misanthrope, "[[SdrawkcabName Ivo Robotnik]]"; the distraction found by Sonic in the fridge added an [[ArsonMurderAndJaywalking obsessive love of eggs]].
* ParentalAbandonment: Sonic.
* SealedEvilInACan: The Chaos Emeralds, with their power to contain malignancy, are sealed by Dr Kintobor in his Retro Orbital Chaos Compressor, or ROCC.
* TalkingAnimal: Sonic learned human language through the Lingua Scrambler.
* TranslationConvention: Used in the early scenes in the forest.
* UnfortunateName: Joe Sushi the walrus is referred to as "unfortunately named".
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