Anton

From Sonic Retro

Anton (アントン) is a badnik featured in Sonic CD. It is based on terrestrial ants.

This little guy simply rolls back and forth along the ground, never going down platforms. They are easily avoided and destroyed. When broken down due to age, these badniks move considerably slower.

PC Manual Description

The Robot Ant wanders left and right on its single wheel, scouting its territory for invaders!