Antlion (Sonic the Hedgehog CD)

The Antlion is a badnik that appeared only within the credits of Sonic CD. The badnik attacks Sonic the Hedgehog after he falls into a pit from a break-away floor, narrowly escaping the robots huge jaws. The setting is a ruinous one, never appearing in the game. This badnik also appears in the Pencil Test.

Trivia
There is the possiblity that the ruinous setting this badnik is located in is the missing R2, due to the fact that all zones are shown within the credits (with the exeption of Tidal Tempest.)

The pits these badniks reside in resemble real-life antlion traps