Vilgax's Drones

Vilgax's drones are drones created by Vilgax to serve him and get the Omnitrix. Drones are robotic rather than organic and are red. These drones can be merged with an organic life form as shown in The Alliance and Vilgax can also telepathetically control the merged signal. There are also gigantic robots which serve him. He mentioned that Vilgax created robots because no one else dared to be around him.

Basic Drone
First Appearance: And Then There Were 10 These small, weak, UFO-shaped drones were the most commonly seen drones in the series. They were capable of flight and had several small limbs armed with lasers and blades. They can also fuse with organic creatures (e.g. Rojo).

Gigantic Robot Drone
First Appearance: And Then There Were 10 Roughly 40 ft tall with more humanoid features and 3 insectoid legs. They possess great strength and large claws, can spawn Basic Drones from their shoulders, can create laser blasts, and spin their legs to become a mini tornado.

Bioid
First Appearence: And Then There Were 10 Small humanoid drones that are barely used for combat, and usually seen on Vilgax's ship. They are capable of speech, unlike other drones, and possess laser guns, grenades, and jet packs.

Mechadroid
First Appearance: The Visitor Slightly larger than the Basic Drone, and barely any different in appearance, though Mechadroids have recognizable faces and spider-like legs rather than the Basic Drone's limbs. They are able to merge with machines in order to gain more abilities, such as attaching a tank to itself to use its cannon, and for each machine merged with, they grow larger and stronger.

Bioid Army
First Appearance: The Final Battle: Part 1 An army of hundreds upon thousands of tall, white, synthetic drones with no faces or weapons. They have blank DNA, and can be synced to the Omnitrix in order to transform all of them into any form selected(basically making an army out of one alien form), giving them any and all of that alien's powers. They communicate by chanting the name of the alien form they are currently in.

Flying Drones
First Appearance: Unknown They are bioids that can fly and change into a jet.

Grunt
First Appearance: Unknown Large gorilla like bioids with gatling lasers.

Insectoid Drones
First Appearance: Ben 10: Protector of Earth Their weapons are scythes, lasers, drills, bombs, and photon arrays.