Transformers Animated season 4

Transformers Animated will finally return for a 4th and truly, final season to properly wrap up the loose ends of the first three seasons.

Plot
In season 4, Megatron and the other Decepticons are in prison on Cybertron and the autobots have returned to Cybertron. Megatron then senses The Fallen has finally awoken for the first time in Centuries. He then sends Strika and her team to free Megatron and the Decepticons to find the All Spark fragments all over earth for he can absorb it's power. Jazz and Ironhide will be joining the team too as they find the All spark fragments that are widespread back on Planet Earth. As the series unfolds, it reveals a second mcguffin for the decepticons the key to vector sigma, a super artificial computer created to rebuild the transformer race following the allspark's ejection from cybertron and the end of the great war on cybertron, not only that but characters Sari, Bumblebee, Bulkhead, Ratchet, Arcee and Optimus learn that Prowl somehow still lives only in the allspark matrix, and guides on them future conflicts they will no doubt see. Including the truth about The Fallen, Megatron and Sentinel Magnus plans for these relics.

Episodes

 * A New Era Undone: After the final battle in the last season, the autobots from earth have been hailed as heroes and Optimus is mirrored to be cybertron's new leader, for about several days the autobots on earth succesfully take down business of corrupted autobots and other straggling decepticons in other cities, however Sentinel uneasy as ever sends a broadcast The Decepticons's new planet home world. Where The Fallen has sends Strika's team the message from Sentinel unknown to them, to free Megatron and the Decepticons from prison but when they try to use the space bridge in the prison city malfunctions and sends them and the prison to earth along with the autobots.
 * Downtown Blackout: Now stuck on earth the decepticons plan to use Blackout to distract Optimus, Bumblebee, Bulkhead, Ratchet, Jazz, Ironhide, Jolt and Air Raid while they steal an allspark fragment at a construction site. On Cybertron, Sentinel comes up with excuse that Optimus has decided to put his new adopted world first before the people of cybertron.
 * Rising Devastator - Part 1:Thanks to the allspark fragment new Constructicons are born who pledge their allegiance to Megatron. Then an allspark fragment is located on Dinobot Island but before they can go the decepticons must help Blackout defeat the Autobots. After defeating the Autobots they go to Dinobot Island and find the constructicons Dirtboss, Mixmaster and Scrapper (Who is no longer Snarl's friend because he went back to the dinobots). It seems the allspark fragment detected was the one inside Dirtboss and the others. As Megtron and the Decepticons go to rip them out of the constructicons the fragments inside both Megatron's constructicons and these other constructicons start to react with each other.
 * Rising Devastator - Part 2:The autobots finally reach the island and can't see any decepticons so the decide to go to the other side of the island. On their way the see the dinobots fighting over another allspark fragment and after a while they drop it and it falls on the holograph device Prowl left there long ago. Grimlock then grabbed it but then waves of energy started emitting from it blowing Grimlock back. Then there was a flash and and the dinobots Sludge and Slag were born (Because when Grimlock picked it up it scanned his DNA). The dinobots then join the autobots when Jolt gives each of them an energon treat (to stop them fighting) and become good friends with Jolt. Then after getting to the other side of the Island they are introduced to Devastator the combined form of the constructicons. After defeating the decepticons (who retreated shortly after) the autobots return to their former home on earth.
 * Shriek: After returning to the warehouse where they once lived where they meet Sari who now has gotten better with her powers. Meanwhile, Laserbeak has found an all spark fragment and delivers it to the central processor of Soundwave. After placing the fragment on top of it it starts to glow and Soundwave is brought back to life in a stronger body with new cassettes such as Ravage. Soundwave then sends a message to Megatron now knowing he is free telling him that he is in an abandoned warehouse . The decepticons then proceed to get him but unfortunately the autobots picked up the signal so them and Sari go to bring him into custody. On the way they meet Wreck-Gar who joins the team. After arriving Soundwave sends out Rumble and Ravage to fight the autobots. Rumble then stuns the autobots by creating an earthquake while Soundwave gets outside. So the autobots go after Soundwave while Sari and Bumblebee stay behind and fight the cassettes. Then after the fight the three are captured but shortly after the decepticons arrive and free them. The decepticons then escape with Rumble, Ravage and Laserbeak returned to Soundwave.
 * Brawl On Cybertron: Back on Cybertron the two decepticon criminals Brawl and Barricade have broken out of jail and plan to re-activate the space bridge to get to Megatron on Earth. Law enforcement officer Cheetor volunteers to go after them but his superior Depth Charge says that the elite guard will handle it. Later Cheetor goes after the decepticons without Depth Charge knowing and after tearing through part of Cybertron finds the two at the spacebridge. He then engages them in battle but after a while loses the fight when the new autobot elite guard members equipped with the same combiner technology as jetstorm and jetfire arrive and try to help. After a quick fight with elite guard members Skids and Mudflap the decepticons win and are about to start up the spacebridge when Mudflap and Skids combine and form Skidflap and Cheetor joins the fight once again and after a big fight the decepticons loose and are about to be taken into custody but before the autobots can react the decepticon Barricade activates spacebridge and him and Brawl get to Earth.  The three autobots then return to the elite guard and Cheetor is rewarded for his effort and is asked to join the elite guard and he accepts. Meanwhile, back on Earth Brawl and Barricade, go to the decepticon base and meet up with the others.
 * Swindled: Swindle's escape pod has finally landed but now he's stuck on earth along with the autobots and decepticons so Swindle heads off hoping that he can find someone to do business with. As he starts walking his foot hits an all spark fragment on the ground that he then picks up and upgrades to one of his weapons and continues on. After getting to the city area of Detroit he sees the decepticons Blitzwing and Lugnut looking for an all spark fragment and proceeds to try and sell something to them but then the autobots Ironhide,Air Raid and Jazz show up to stop them. So after the fight, the autobots win and return with the all spark fragment (which was in a trash can that was knocked over during the fight). The decepticons then retreat and Swindle follows them back to their base(an old crashed cybertronian spaceship) expecting them to buy something. When he gets there he sees Blitzwing and Lugnut thrown outside by Megatron. The two decepticons then try to apologize but Megatron says apologizing won't help you fools and proceeds to injure them even more but then Swindle cuts in and asks Megatron if he would like to buy any of his products while at the same time showing him the items. The decepticon leader then sees the allspark fragment inside one of Swindle's weapons and tells the decepticon to give him it. Swindle then replies in saying he can have it for the right price. Megatron then proceeds to take it by force when the autobots Optimus Prime Bumblebee and Bulkhead who had detected the fragment on their scanners show up to take the fragment. The decepticons Blitzwing, Lugnut, Swindle and Megatron try to keep them from getting it and after a fight where Swindle used the weapon to seriously wound Bulkhead the decepticons are beaten by Prime and Bumblebee and they take the fragment. After the battle Bulkhead is repaired by Ratchet and Swindle is forced to join the d ecepticons or be destroyed for losing the fragment.
 * The Cyber Squad: The Fallen sends his elite decepticon team known as the Cyber Squad to Cybertron to keep the team of Rodimus Minor made up of Rodimus Minor, Hot Shot, Red Alert, Brawn and Iron Hide's replacement Arcee from reactivating the spacebridge because they were ordered by Ultra Magnus to go to Earth and help Optimus Prime and his team. After the Cyber Squad get to Cybertron their leader Darkmount tells the decepticon spies Dead End and Sideways to keep watch and that they must try to stop the autobots team if they arrive. Darkmount, Wildrider and Scorponok go into the city to cause damage to distract the autobots During their actions on Cybertron, The Fallen gives them another assignment to retrieve a key for future purposes... After arriving in the city the decepticons cause a lot of damage when Cheetor shows up and tries to stop them. The decepticons then battle Cheetor and after a quick fight he is defeated but before Wildrider can finish him of Hot Shot and Brawn show up and battle Scorponok and Wildrider and after another quick battle the decepticons have lost but the autobot Brawn is then hit with a critical blow from Darkmount but before he can finish the autobot Hot Shot attacks him and injures him. Hot Rod then grabs Brawn and tries to get to the space bridge. Meanwhile the autobots Rodimus Minor, Red Alert and Arcee show up and activate the space bridge but before they can use it they are attacked by Dead End and Sideways so Rodimus and Arcee battle the two and while they are fighting the autobots Hot Shot and Brawn show up and Red Alert repairs Brawn. After a short battle between the autobots and decepticons the autobots win and are about to pass through the space bridge when Darkmount shows up but before he can stop them Cheetor shows up and attacks him. Thanks to Cheetor the autobots pass through the space bridge and then Cheetor escapes Darkmount. The decepticon team retreats in defeat and the autobot team joins up with the autobots on Earth.
 * Heatwave: Meltdown returns with newfound powers, and creates new mutant creatures and upgrades Colossal Rhodes to combat against the decepticon, as Team Charr looks for more fragments they come across Meltdown, while Strika isn't in the mood for an human alliance, Oil Slick on the other hand learns of Meltdown's powers and attends to experiment him to create a batch of Cosmic Rust against the autobots, in the climax Meltdown turns into a planetwide defcon as his power increase tenfold and attempts to turn all of the people Detroit, the world into Radiation waste like him, he does fall for good, but Oil Slick's recovers enough of his DNA before his demise, in order to finalize materials needed to tip the scales of their new war.
 * Operation: R.I.D: A new Transformer Human Hate crime organization with powers similar Slomo frees her and old gang, this new crime organization called R.I.D launch a full scale attack on the autobots and actually gain their equipment from Soundwave and are mind controlled to destroying the autobots once and for all.


 * Bounty Wars: Megatron remembers the other two clones of Starscream were previously in space, so Megatron assigns his old friend Lockdown to go capture him, also Blitzwing, Cyclonus and The Sunstorm Starscream accompanies him, along with Swindle who hitches a ride. In space Lockdown catches the attention of another bounty hunter but he is also an autobot formally another a student Yokitron who contacts the elite guard but to no avail, however Sari, Jazz and Ratchet pickup the signal and accidently transport to Lockdown's ship.
 * Attraction : The Autobots and Decepticons learn that a power surge of new techno organic energon is emitting in New York City, Arizona and the Hoover Dam mostly due to the allspark shard residues spreading all across the country. Megatron believes this power could enough to create a new body for himself and power up the city of Trypticon, but soon enough both sides realize the energon is to unstable for a regular transformer to hold.
 * Survival of the fittest II Part 1: Blackarchina a former autobot and decepticon returns to current timeline era of Transformers Animated, and reunites with her supposed decepticon allies for the first time since the pilot episode, proposes an alliance to allow her to create a new decepticon army and perhaps take the energon. She finds the Dinobots still stuck on Dinobot Island and takes control of them. Using them only to distract the autobots, which forces Isaac Sumdac and the autobots to rebuild the Dinobots intelligence. Meanwhile Blackarchina finds more earth energon in Paris and other cities, her creations go by to each city devour the lot of them.
 * Survival of the fittest II Part 2: Having the latest fruits of her labor at work, Shockwave sends Blackarchina and her "Predacons" to Cybertron to find the Key to Vector Sigma an artificial super computer that was able re create new life on Cybertron after the Allspark's separation, to use on earth. Somehow she quickly has a second opinion, having learned so much during her times in prehistoric earth takes the key for herself and creates an endless army of Predacons to rule cybertron. She creates a clone of both Optimus and Sentinel called Primal Prime, The autobots on earth learn of this attack and with the Magnus Hammer defeat her. She does however lose the key and is forcibly throws it into one of the space bridges, which flies endlessly in space until it is caught in a space cruiser with very large decepticon symbol on it.
 * Into the Fire: The autobots learn from Spittor that the Fallen is their man, and the elite guard led by Sentinel Prime who are still looking for the Vector Sigma key's last known coordinates is the new leader of cybertron at this point. He uses Powermaster armor a new super form that he thinks can outmatch The Fallen but he soon realizes he has bit off more than he can swallow. In the climax Ultra Magnus succumbs to wounds following the Cyber Squad Attack, Sentinel now the new leader decides to decommissions the space bridges until The Fallen and Megatron apperhanded, not only severing ties with earth, but with cybertron's sister planets, Sentinel allows Optimus and his team to leave but for now Sentinel will only allow Optimus to transport to Cybertron on his commands. Around this time the constructicons are freed from a transformer human like prison and are given a new leash
 * Deep Six: During a reformate chamber session in Trypticon, and the infusion of Earth's Energon, Megatron's body is boosted into grander heights. Everything seems fine until the decepticons Ramjet, Lugnut, Wildrider implant accidental codes for a incomplete triple changer project, rendering Megatron unstable, he goes on a rampage in multiple cities, where the autobots engage. Around this time the constructicons are freed from a transformer human like prison by Shockwave and are given a new leash on life to restore Megatron's mind and body.
 * Revelation: The origins to great war are revealed when Sari accidently taps into Wreck Gar's allspark shard since space bridges on cybertron are gone, she goes to the Allspark Matrix for guidance, including the Rise of a foe called UNICRON!!!
 * Countdown to Extinction: Sari and Optimus Prime learn from another vision from several allspark shards that they gathered from the recent conflicts on earth. Prowl who is within the allspark matrix reveals that Sentinel is planning a big invasion on earth to destroy Megatron who is still weak from "Deep Six" and the Fallen not knowing that an old decepticon foe exists within the shard. Sentinel arrests the council who argue with his dark designs with the allspark.  As he begins to invade earth, meanwhile on the new decepticon home world, The Fallen begins his invasion now a mentally stable Megatron has made preparations upon Trypticon and prepare to destroy the autobots, however Shockwave pickups space bridge signatures, indicating the elite guard have arrived to stop them. Optimus however attempts to Sentinel from doing something that doom himself, but instead Sentinel having enough of his crap takes down Optimus, with the elite guard already regretting Sentinel as their leader instead stands up to him and helps Prime take him down. Finally the Decepticons make a move, leading the elite guard and autobots to try and stop them.
 * The Ultimate Doomsday Part 1: Invasion

In the first three parter series finale, The Fallen arrives on earth with the rest of the decepticons who were all given amnesty after the big battle with the Omega Supremes, and invade the cities of the United States, nearly sucking them dry of energon. Optimus, Omega Supreme and his team and are able to a make a brave attack against Megatron and Trypticon but fall in the process. The Decepticons win, taking most of the earth team prisoner. T Meanwhile a small ragtag team led by Sari, Ironhide, Jazz and Arcee are transported on cybertron to call for help but find out Cybertron is under siege by Team Charr and the Cyber Squad who steal the Allspark Matrix, and kill and harvest most of the autobot civilizans in Iacon, to use for Trypticon and for the Key to Vector Sigma that The Fallen has had along after the Predacon Invasion.


 * The Ultimate Doomsday Part 2: Escalation

On earth, team charr returns with the Matrix,while the Cyber Squad along with the Combaticons stay on Cybertron to take control of the autobot's Fortress Maximus. The decepticons meanwhile use the key on earth and begin to create life from unmanned vehicles in Detroit. With the autobots and elite guard inactive, the world leaders stage an attack against the decepticons, with their attempts falling off deaf ears, meanwhile Sari transports into Iacon where she and her team frees Blackarchina to counteract the decepticons on Cybertron and Earth. Meanwhile The Fallen reveals his nefarious plans for both Earth and Cybertron as he plans to fuse the key with the Allspark Matrix and use the vehicles of Detroit and other cities to create an endless army of new decepticons called Terrorcons worst than Predacons!!! Not only that The Fallen or someone possessing The Fallen's body is also planning to combine worlds into one with his spark as the core!!!! Sentinel's betrayal is revealed by the Fallen as he trangulated the signal from Cybertron to the Decepticon's new home from the very first episode of season 4. Sentinel is killed during this outcome. Optimus in a powered up Powermaster Wing Blade armor rallies the autobots, and Elite Guard telling them for Ultra Magnus to fight on, as the decepticons's new army the Terrorcons seemly got them on the back pedal. That is until Blackarchina's Predacons arrive helping the autobots and Dinobots. Optimus leads them to the Decepticon new operations on cybertron, while Bumblebee, Jazz and Kup help lead a assault against Soundwave, Onslaught, Obisdian in Trypticon.


 * The Ultimate Doomsday Part 3: Till All Are One Series Finale

In the long awaited epic finale to Transformers Animated, Optimus Prime's surviving Autobots, Elite Guard, Dinobots, Predacons, Humans and Omega Supreme duke it out against Megatron and the Fallen's powered up Decepticons, Cyber Squad, Team Charr, Terrorcons, Devastator and Trypticon in one last final all out war. As the Fallen plans reach the final stage, Sari finally learns the entirety of her existence and that she and Optimus are forced by the ghost of Prowl to do something that could eradicate the future for any transformer, autobot, decepticon, Predacon or other alike perhaps forever. In order to prevent the destruction of earth, the rise of Unicron, the rise of Galvatron and future wars, conflicts and evil tyrants beyond, they must use the Magnus Hammer to destroy the Allspark matrix and the Key to Vector Sigma!!!!

Autobots

 * Autobot Team Commander Wingblade Optimus Prime - Futuristic Semi-trailer truck/fire truck
 * Autobot Speedster Bumblebee - Sports Supermini
 * Autobot One Bot Wrecking Crew Bulkhead - SWAT Assault Truck
 * Autobot Field Medic Ratchet - Earth ambulance
 * Autobot Super Spy Arcee - Cybertronian car
 * Autobot Techno-organic Sari Sumdac - female human
 * Autobot Cavalier Rodimus Minor - Futuristic 2008 Dodge Challenger/1969 Ferrari Daytona
 * Autobot Pyrotechnics Hotshot - Cybertronian Sports car
 * Autobot Field Medic Red Alert - Cybertronian ambulance van
 * Indestructible Autobot Warrior Ironhide - Cybertronian minibus
 * Autobot Demolitions Brawn - Cybertronian Halftrack
 * Autobot Rookie Wreck-Gar - Garbage truck
 * Autobot Rookie Jolt - Chevy Volt
 * Autobot Rookie Air Raid - Cybertronian jet
 * Sliverbolt - Cybertron jet
 * Skydive - Cybertron jet
 * Slingshot - Cybertron jet
 * Fireflight - Cybertron jet
 * Alpha bravo - Cybertron heilcopter
 * Autobot Heavy Firepower Warrior Omega Supreme - Autobot Spaceship Ark (much larger than before)

Autobot Council

 * Autobot Vice-Magnus Alpha Trion

Autobot Elite Guard

 * Autobot Supreme Commander Ultra Magnus - M982 Heavy Expanded Mobility Tactical Truck (Dies midway in the fourth seasons due to complications with his body by Shockwave and Predacons)
 * Autobot Elite Commander Sentinel Prime - Snowplow truck (Takes over as the new planet leader of cybertron, if you'd guess it doesn't go so well)
 * Autobot Elita Ninja Jazz - Futuristic Sports car
 * Autobot Super Speed Warrior Safeguard
 * Autobot Junior Officer Jetfire - Cybertronian jet
 * Autobot Junior Officer Jetstorm - Cybertronian jet
 * Autobot Junior Officer Skids - Futuristic Chevy Sparks
 * Autobot Junior Officer Mudflap - Futuristic Chevy Sparks
 * Autobot Super Combat Warrior Skidflap
 * Autobot Sky Commander Silverbolt - Cybertronian jet
 * Autobot Combat Instructor Sideswipe - Futuristic Chevy Stingray
 * Autobot Communications Officer Blaster - Cybertronian boombox
 * Autobot Law Inforcement Officer Cheetor - Cybertronian race car
 * Autobot Super Spy Mirage - Blue Cybertronian race car
 * Autobot Super Spy Chromia - Blue Cybertronian car
 * Autobot Elite Security Commander Springer - Green Cybertronian helicopter
 * Autobot Elite Security Roadbuster - Orange Cybertronian race car
 * Autobot Elite Security Leadfoot - Red Cybertronian race car
 * Autobot Elite Security Topspin - Blue Cybertronian race car
 * Autobot Elite Security Guard dog Steeljaw - Cybertronian pit bull
 * Autobot Elite Security Warpath - Cybertronian tank
 * elita one cybertonian car

Dinobots

 * Dinobot Leader Grimlock - Mechanical Tyrannosaurus
 * Dinobot Smasher Snarl - Mechanical Triceratops
 * Dinobot Bombardier Swoop - Mechanical Pteranodon
 * Dinobot Cutter Slag - Mechanical Stegosaurus 
 * Dinobot Defender Sludge - Mechanical Brachiosaurus

Cybertron Intelligence

 * Autobot Intel Agent Cliffjumper - Cybertronian car

Autobot Ministry of Science

 * Autobot Scientist Perceptor - Cybertronian Pickup / Mobile Laboratory


 * Autobot Mechanical Engineer Wheeljack - Cybertronian rally race car

Decepticons

 * Decepticon Leader Megatron - Tiltrotor gunship and Fighter Jet
 * Decepticon Deep Cover Spy Shockwave - Cybertronian tank/Assault tank
 * Decepticon Berserker Blitzwing - Dual-barreled assault tank/Swing-Wing Fighter jet
 * Decepticon Loyal Lugnut - Futuristic combo Bartini Beriev VVA-14/B-29 Superfortress/Heinkel He 111
 * Decepticon Trickster Blackarachnia - Techno-organic spider
 * Decepticon Captain Brawl - Heavy Tank
 * Decepticon Bounty Hunter Lockdown - Muscle car
 * Decepticon Sonic Warrior Soundwave - Cybertronian jet/Satellite (Formally a creation of Megatron and Isaac Sumdac but evolved into a decepticon, and now finally serves as Soundwave Nuclear Option during the reconstruction of the Decepticon faction)
 * Decepticon Espionage Laserbeak - Flying V Electric guitar
 * Decepticon Retriever Ravage - Mechanical Panther
 * Decepticon Warrior Rumble - Cybertronian Hammer
 * frenzy boombox
 * Decepticon Warrior Overkill - Cybertronian Gun
 * Decepticon Warrior Slugfest - Cybertronian Axe
 * Decepticon Weapons Specialist Swindle - Hummer
 * Decepticon Enforcer Barricade - Police Car
 * Decepticon Mutant Madman Waspinator - Techno-organic wasp
 * Decepticon Mass Destruction Warrior Trypticon (with a moving tail and same size as Omega Supreme) - Formally Decepticon City in Kaon & Decepticon Warship Nemesis

Starscream Clones

 * Decepticon Coward Skywarp - Sukhoi Su-47 Berkut
 * Decepticon Egomaniac Thundercracker - Sukhoi Su-47 Berkut
 * Decepticon Sycophant Sunstorm - Sukhoi Su-47 Berkut
 * Decepticon Liar Ramjet - Sukhoi Su-47 Berkut
 * Decepticon Air Commander Slipstream - Sukhoi Su-47 Berkut (next to Starscream's position as one of Megatron/Galvatron's 2nd lieutenant)
 * Starscream f-22 jet (Physical Body was left in detroit but was found by Wreck-Gar, his sub conscious exist within the allspark matrix)

Constructicons/Devastator

 * Constructicon Foreman Dirt Boss - Forklift
 * Mixmaster - Cement truck
 * Scrapper - Excavator
 * Long Haul - Dump Truck
 * Rampage - Bulldozer 
 * Hightower - Hydraulic Crane

Team Chaar

 * Decepticon General of Destruction Strika - Six Wheeled battle tank
 * Decepticon Aerial General Obsidian - Cybertronian helicopter


 * Decepticon Airborne Soldier Blackout - Cybertronian spacecraft/ Blackhawk


 * Decepticon Saboteur Cyclonus - Cybertronian jet


 * Decepticon Chemical Warfare Oil Slick - Cybertronian Motorcycle


 * Decepticon Waste Disposal Spittor - Cybertronian Walker

The Cyber Squad (The Fallen's elite decepticon squad)

 * Decepticon Team Leader Darkmount - Cybertronian tank (part of a joint faction The Fallen's group and lives on the decepticons new planet after the battle of Iacon)
 * Decepticon Underground Warrior Scorponk - Cybertronian scorpion
 * Decepticon Explosives Expert Wildrider - Black Cybertronian race car
 * Decepticon Super Spy Sideways - Futuristic lambourgini
 * Decepticon Super Spy Dead End - Futuristic ferrari

The Predacons (Blackarchina' s creations)

 * Predacon Sub Commander Primal Prime- Clone of Optimus Prime and Sentinel Prime- Techno Armored Gorilla
 * Predacon Electrocutioner Quickstrike - Techno Organic Scorpion Crab Hybrid
 * Predacon Warrior Slasher- Techno Organic Velociraptor
 * Predacon Berserker Tantrum - Techno Organic Rhino
 * Predacon Divebomber Tigerclaw- Techno Organic Eagle/Tiger Hybrid
 * Predacon Pyromaniac Inferno- Techno Organic Fire Ant
 * Predacon Multiplier Shrapnel- Techno Organic Stag Beetle

Others
 * Megatronus Prime/The Fallen - Cybertronian Fighter jet and Founder of the Decepticons, He still is Leader of the Decepticons (He had started the war between the autobots and decepticons prior to Ultra Magnus's rise, he was defeated by a younger Ultra Magnus and  was placed in stasis lock by the decepticons who stored his body in a current decepticon homeworld planet. Passing his leadership to his student Megatron, but was awakened by the completion of the matrix and Megatron's capture)
 * Unicron (A universal giant devil like robot is but his essence and mind is a evolved personality within The Fallen's mind and his robot mode as a fusion of Earth and Cybertron in the dystopian futures that Sari, Optimus and the autobots from earth witness)
 * Galvatron ( A futuristic Decepticon warlord seen in Sari's visions, and is actually Megatron rebuild in a new body by the Vector Sigma Key and Allspark Matrix)
 * Cyclonus ( A decepticon warrior sent back from the future for unknown means and is one of the Starscream Clones)
 * Scourge (A decepticon leader of his own army, and is one of the Starscream Clones)
 * Scourge army
 * Nova Magnus
 * Delta Magnus
 * Zeta Magnus (all former Magnus leaders but died prior to the series)
 * Terrorcons (New decepticons given life by the fused Matrix Sigma Key )
 * Demolisher
 * Onslaught
 * Blastoff
 * Dreadwing
 * Tankor
 * Flatline
 * Crowbar
 * Thunderblast

Voices

 * David Kaye - Optimus Prime, Lugnut, Grimlock, Cliffjumper, Highbrow, Warpath, Dead End, Primal Prime
 * Corey Burton - Megatron, Ratchet, Longarm Prime/Shockwave, Spike Witwicky, Ironhide (1st voice), Brawn, Deathsaurus, Sunstreaker,
 * Tom Kenny - Starscream (Ghost Only), Thundercracker, Skywarp, Ramjet, Sunstorm, Issac Sumdac, Wasp/Waspinator, Scrapper, Jetfire, Beachcomber, Terrarsaur
 * Jeff Bennett - Soundwave, Ultra Magnus, Prowl, Mixmaster, Captain Fanzone, Grandus, Rumble, Frenzy, Hightower, Brawl, Quickstrike
 * Phil LaMarr - Jazz, Jetstorm, Oil Slick, Alpha Trion, Omega Supreme
 * John DiMaggio - Sideways, Wheeljack, Trypticon, The Motor Master, Spittor, Leadfoot, Inferno
 * Townsend Coleman - Sentinel Prime, Tracks
 * Tara Strong - Sari Sumdac, Slipstream, Red Alert, Strika, Teletran-1, Carly Witwicky, Daniel Witwicky, Shrapnel
 * Bumper Robinson - Bumblebee, Blitzwing, Porter C. Powell, Blackout, Barricade
 * Bill Faggerbakke - Bulkhead, Hot Shot, Cosmos, Topspin
 * Cree Summer - Elita-1/Blackarachnia
 * Susan Blu - Arcee (1st voice), Flareup
 * Judd Nelson - Rodimus Prime
 * Lance Henriksen - Lockdown
 * Fred Willard - Swindle
 * John Mariano - Dirt Boss, Devastator
 * George Takei - Yoketron
 * MacInTalk - Perceptor
 * Diedrich Bader - Ironhide (2nd voice), Bonecrusher, Snarl, Breakdown
 * Kari Wahlgren - Arcee (2nd voice), Drag Strip, Nancy Witwicky, D-Navi
 * Rick D. Wasserman - Cyclonus, Air Raid, Mirage, Rampage
 * Eric Bauza - Bludgeon, Jolt, Roadbuster, Slasher
 * Gilbert Gottfried - Swoop
 * Louie Armstrong - Snarl
 * R. Lee Ermey - Sargent Kup
 * Tricia Helfer - Chromia
 * Richard Steven Horwitz - Scalpel
 * Maurice LaMarche - Sky-Byte, Mindwipe
 * James Remar - Sideswipe, Scorponok
 * Brian Bloom - Springer, Wildrider
 * Dwight Schultz - Whirl, Galvatron
 * Tony Todd - Megatronus Prime/The Fallen/Unicron
 * Peter Cullen - Allspark Matrix in vision (Is not Primus)

Crew

 * Susan Blu - Casting and Voice Director