Sorry I don't have pictures, but I know of two cameos on the Sega Saturn, 1. Sim City 2000, I think there's a building with Sonic on it, I saw it in a magizine so I don't know. 2. Fighting Vipers, When you finish with Tokio there's a portrait of him playing an arcade game, with a Sonic the Fighters poster in the background. Both of these have probably been found.