Arcee Enemies

A Decepticon/Predacon member who first appears in the series Transformers Prime. Airachnid is a psychopath who kills for fun and sport, she enjoys wiping out entire species, and torturing her victims before killing them, she keeps the heads of her victims as trophies.

Leader of the terrorist organization COBRA. He also makes a guest star appearance in Transformers. He has been the main villain of most G.I. Joe series, and has grown only more evil and darker over the years.

Once a fallen Decepticon (either Skywarp or Bombshell?) now reborn by Unicrons power as Cyclonus.

Eradicons are Decepticon soldiers, also known as Vehicons in certain media (comic books, video games)

After Megatron was badly injured and thrown out into space by Starscream. He encountered Unicron who gave him more power and was reborn as Galvatron.

Another class of Decepticon Soldiers capable of transforming into Beetles. The Insecticon Drones are massive animalistic soldiers.

Knockout is a member of the Decepticons, notably their doctor in Transformers Prime

Soundwave's minion used for recognizance. Also an Autobot in Transformers Armada

A bounty hunter who likes to make trophies of his bounties upgrades and personal modifications. He usually works for the Decepticons.

A member of the Decepticons capable of impersonating other Transformers.

Foot soldiers of MECH, believed to be either ex-military, or current military operatives as well.

Silas' recurring co-pilot, yet to be called by name.

Science officers of MECH, also referred to as MECH Surgeons due to the fact that they "operate" on captured Autobots and Decepticons.

The first Emperor of Destruction of the evil race of robots known as Decepticons. He hates Autobots and their leader Optimus Prime.

The Five faced variety of Quintessons, this sub-species of the Q's are often nameless and just called Quintesson or Judges.

Ravage is one of Soundwave's minions and one of his most reliable spies.

One of Soundwave's Minion, and loyal follower of Megatron, small but tough and always looking for a fight.

A member of the Decepticons able to turn into a scorpion. Also a member of the Predacons under the leadership of the second Megatron.

Scourge is one of the most dangerous Decepticons, seeming to become more and more powerful with each incarnation. He is usually depicted as a creation of Unicron or a clone of Optimus Prime. He is often known as Nemesis Prime, in the current generation he is created by MECH.

A primitive mechanical species that are ruled by their appetites above all else.

Shockwave is a powerful member of the Decepticons who serves as their scientist. Shockwave is Megatron's true second in command and was in charge of Cybertron when Megatron was on Earth.

Leader of the terrorist group known as MECH, he is an enemy of the US Government and the Autobots. After being injured in his last encounter with the Autobots his team was able to place his body inside of Breakdowns lifeless shell. Was later reborn as a part cybertronian cyborg.

A Decepticon Communications Officer who is able to detect and jam radio transmissions all across the energy spectrum. His alternate mode is a Cassette Player (originally, it is now a jet).

Part of the Decepticons who is the Most powerful of the Seekers. Starscream is usually the scheming second in command to Megatron. Ultimately joined the Autobots in the Armada continuity. In the Prime series he is described as dead to the Decepticon cause by Megatron, but has really gone rogue.

Sweeps were Decepticon soldiers created by Unicron using the bodies of the Insecticons Shrapnel and Kickback, since there are usually at least three either Bombshell or Skywarp are likely the third (debatable). They are led by Scourge.

One of the first 13 Transformers created by Primus. The Fallen betrayed his brothers and Primus to become a servant to Unicron.

Unicron is a Transformer that is the size of a planet. He is an evil being able to destroy/devour planets. He was created by Primacron in the cartoon using a node of Vector Sigma as a template. In the comic origin he was a god.

Criminal enemy of the Autobots

A Decepticon Headmaster