Eggman mostly follows the camera's horizontal movements in his Water Eggman, but briefly disappears below the stage floor when the Water Eggman's tank of Mega Mack empties its contents onto his head, only to re-emerge some time later with a refilled tank and Dr.
Sonic and Tails make respective background appearances running eastwards atop the raised platform and being transported westwards via a high-speed warp tube, while Dr. MabsKMK's Chemical Plant Zone uses sprites taken from Sonic the Hedgehog 2, though the ChemicalPlant2 and ChemicalPlant4 definition files recolour the background buildings to match their appearance in the Sonic - The Lost Land 2 ROM hack, while also adding a fog effect that partially obscures the lower parts of certain background objects.
'Chemical Plant Zone' from Sonic the Hedgehog 2