Mecha-Bu (メカブ[1] Mekabu?), or Robot Beetle,[2] is a recurring enemy in the Sonic the Hedgehog series. They are beetle-based Badnik models created by Dr. Eggman.


The Mecha-Bus resemble Japanese rhinoceros beetles. They have a blue body with two yellow, red-capped rear-wheels and two small grey forelimbs which have small black wheels with red caps for hands. On the front they have a black face with two black eyes, a yellow jaw cap and yellow helmet. Attached to their face is a horn with a buzz-saw.

Game appearances

Sonic the Hedgehog CD


In Sonic the Hedgehog CD, Mecha-Bus can only be found at Metallic Madness . In gameplay, they roll slowly along the ground, raising and lowering their buzz-saw horns. However, they are unable to turn around, which makes them vulnerable to attacks on the rear. When attacking, the player has to avoid their buzz-saw.

In the Bad Future or sometimes in the present timeline of the Rounds, Mecha-Bus are one of the few Badniks who do not show decay, thus remaining pristine in appearance. However, such Mecha-Bus still cannot move their buzz-saws. Like every Badnik in the game, they are powered by Little Planet flower seeds which will pop out of them after being defeated.

Sonic Mania

In Sonic Mania, Mecha-Bus appear as enemies in Metallic Madness Zone.


  • In an cinematic ending animation during the game's credits, the Mecha-Bus are seen residing in Wacky Workbench despite not appearing there in gameplay.



  1. Sonic the Hedgehog CD (Sega Mega-CD) Japanese instruction manual pg. 32.
  2. The Robot Beetle moves around brandishing its horn with integral circular saw at enemies! - Sonic the Hedgehog CD PC port help file.

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