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

Energon drones are insect-like non-sentient robots either created or corrupted by the AllSpark.

Games

Transformers The Game

When Bumblebee infiltrated the Sector Seven base within Hoover Dam and managed to release the locks on the AllSpark, stray energy bolts began to leap from the cube as it slowly shrank, creating a swarm of Energon drones. Bumblebee was forced to defend himself against the critters... and Sector Seven artillery... and a defrosting Megatron! Oy!

Escaping with the AllSpark, as Bumblebee drove through Mission City with the cube in his backseat, it 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. Transformers The Game (console)

Transformers: Autobots video game

As Bumblebee retrieved the AllSpark from the Dam, the Cube sent out bolts of energy that turned whatever they hit into Energon Drones. To defend itself. From being saved. Yeah.

Best ignored, the safest thing to do was just destroy the generators creating the force field around the Allspark, grab the cube and run like hell.

Later on, during the battle of Mission City Tranquillity, after Megatron got a hold of the Allspark, he created drones to attack Optimus, while he fought Create-A-Bot. After Megatron was hit in the chest with the Allspark, they all just disappear. Yeah.

When attacked, the smaller robots will explode and damage anything nearby, and if a larger Transformer is close enough, he'll be thrown back by the explosion.

Transformers: Decepticons video game

Possessing the AllSpark, Starscream has the ability to create and control Energon drones (here called Spark Drones) and sends waves of them after Create-A-Bot. However, being weak, small, and made of rusted out old vehicles, they easily fall to Create-A-Bot's blaster.

They later appear in both Autobots and Decepticons in a challenge mission, "Drone Extermination".