It actually surprises me they were going with the SatAM Robotnik design - the norm back then was for Robotnik to be localised into his AoStH look afterall.
Seeing as how the game released in 1993, the norm actually wasn't set yet. In fact the US comic that came out around that time also used the SatAM look, while the other games continued to use the black hole eye Robotnik design.
I updated the page with a few graphics exclusive to the prototype; it's nothing earth-shattering, though these Badniks are a surprise. The game doesn't really have traditional enemies, but I imagine the first two are what Eggman is controlling with his remote, and the fish was planned for Wild Water Way.
