Beetle Drones are beetle-like robots that make up the standard infantry of Aku's minions after the X-Models. They are created, and upgraded, by Aku's evil scientists.
Beetle Drones crawl on land like actual insects but when they are in battle mode, they stand up on two legs. They could travel in great speed on both land and air. They were armed with four powerful scythes attached to their body. Though effective machines, they were no match for the skills of Samurai Jack. However, in sufficient numbers, they can and have proven dangerous to even Jack. Later they were upgraded with insect-like wings on their back which allowed them to fly.
In their first major appearance, Jack had recently arrived to the future and managed to destroy the drones sent by Aku after formulating a plan to protect the canine archaeologists. After this battle, the Beetle Drones made minor appearances throughout the rest of the series.
Though they are robots, they seem to be able to possess a sense of fear, which can be seen when at least one beetle drone attempted to retreat during a battle.
In Season 5, their appearances have changed quite a bit. They have now been upgraded to resemble stag beetles as opposed to rhinoceros beetles the previous models were based on. Their eyes are also now red and they no longer have a toothy mouth on their faces. They also come equipped with large pincers. Despite their change and upgrade, they are still a fodder to Jack as always.