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. They don't seem to have much to do with energon.

Fiction

Transformers: The Game (console)

When Bumblebee was driving through Mission City with the All Spark in his backseat, the cube radiated energy 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.

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

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