Energon drone

Energon drones are robots from the live-action movie continuity family.

Energon drones are insect-like nonsentient robots either created or corrupted by the All Spark.

Fiction

Transformers: The Game (console)

When Bumblebee was driving through Mission City with the All Spark in his backseat, the cube radiated Energon in massive amounts, which coursed through the Energon drones which were standing around on the sidewalk for no apparent reason. The drones followed and swarmed Bumblebee, who crashed into a building and had to be saved by Ironhide. While the Energon drones were small, weak, and only armed with a single machine gun, they came in great numbers. Ironhide won anyway.

Another group of Energon drones also attacked Scorponok in a nearby park, but were destroyed.

From Teletraan I: The Transformers Wiki, a Wikia wiki.