Gator resembles a green (though sometimes it may be colored blue) alligator-like robot on wheels. It rolls over and chomps the player during the stage. It was in Emerald Hill and Hidden Palace's Debug lists, although it is most known for its appearance in the lost Sand Shower Zone and the beta version of Mystic Cave Zone.
- This Badnik is called Alligator in early design documents.
- Gator and BFish are the only two Badniks found in the prototypes of Sonic the Hedgehog 2 to not also be featured in the Debug Mode of the Christian Whitehead-produced 2013 mobile release of Sonic the Hedgehog 2.
- Being listed under the name "gator" in the Nick Arcade prototype's source code.