Stay Sonic was a book published in 1992, based on an internal document. This book served as the basis for all UK SonicTheHedgehog fiction.

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Tropes used in this book:
* AnimalTalk: Sonic learned human language through the Lingua Scrambler.
* {{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, [[SonicTheComic rather than simply brown.]]
** Hibernation is important to the plot.
* CreateYourOwnVillain
* EarthDrift: Inverted.
* FaceHeelTurn: Kintobor/Robotnik.
* ParentalAbandonment: Sonic.
* TranslationConvention: Used in the early scenes in the forest.