Sonic 3D: Flickies' Island/Hidden content
From Sonic Retro
PC Version
Missing Render
Kojichao found what appears to be a concept art piece for the final version, possibly used for a final 'explosion' image. The background is very dark and can barely be seen, unlike the Sonic crackers styled backdrop seen in the final game. He is also equipped with items from his 3rd and 5th phase.
Unused Special Stage Intros
File:S3d sonknu.gif File:S3d sontai.gif
These images may have been meant to be used for loading screens shown before the special stage. However, the Special Stages don't require much loading time so the images went unused.