Mecha-Bu

From Sonic Retro

Mecha-Bu (メカブ) is a badnik featured in Sonic CD.

Resembling a Japanese rhino beetle, these guys roll back and forth, raising and lowering the buzz-saw connected to their helmets. They do not turn around. When broken down due to age, these badniks cannot lift their buzz-saws.

PC Manual Description

The Robot Beetle moves around brandishing its horn with integral circular saw at enemies!