Sonic The Hedgeblog — In the Sega Saturn port of 'Gale Racer', numerous

In the Sega Saturn port of ‘Gale Racer’, numerous Sonic characters appear as dashboard flare. These are the sprites for the 3 classic robot Sonic items. In the files they are called ‘MEKASO1′

NSFW - Games - NeoGAF Official SEGA SATURN Community, Page 24

NSFW - Games - NeoGAF Official SEGA SATURN Community, Page 19

Sonic The Hedgeblog — Art Gallery 'Sonic Jam' SEGA Saturn

Weird and beautiful Sega Saturn games, Page 5

Sonic Saturn (lost build of cancelled Sega Saturn prototype of platformer; mid-1990s) - The Lost Media Wiki

Weird and beautiful Sega Saturn games, Page 5

Sonic 1: Saturn [Sonic the Hedgehog (2013)] [Mods]

NSFW - Games - NeoGAF Official SEGA SATURN Community, Page 3

NSFW - Games - NeoGAF Official SEGA SATURN Community, Page 3

Sonic Saturn, Sega Wiki

NSFW - Games - NeoGAF Official SEGA SATURN Community, Page 19

Proto:Sonic R (Sega Saturn) - The Cutting Room Floor