RETURNING AUTOBOTS
Optimus Prime - The Autobot leader. He retains his alternate mode of a blue Peterbilt 379 Semi truck with red flame decals. He is seemingly killed by Megatron, but is brought back to life after receiving the Matrix of Leadership. He then uses parts from Jetfire to destroy the Harvester and fight Megatron and The Fallen. He manages to wound Megatron and the overpowers and kills The Fallen. Concept art of Optimus Here, Optimus combining with Jetfire Concept art Here.
Bumblebee - The Autobot who befriended Sam and disguises himself as his Fifth Generation Chevrolet Camaro. Bumblebee's voice is still healing and he still uses radio soundbites to express some of his emotions. Concept art of Bumblebee Here.
Ironhide - The Autobot weapons specialist who transforms into a GMC Topkick. He helps Optimus bring down Demolisher in the beginning of the film. Concept art of Ironhide Here.
Ratchet - The Autobot medic who transforms into a search and rescue Hummer H2. Concept art of Ratchet Here.
NEW AUTOBOTS
Arcee - A female Autobot who transforms into a pink Ducati 848 retroSBK motorcycle. Only Arcee is addressed by name in the movie, however the others are given names in the toyline. Concept art of Arcee Here.
Chromia - Arcee's sister, she transforms into a blue Suzuki B-King 2008 retroSBK motorcycle. Concept art of Chromia Here.
Flareup- Arcee and Chromia's sister who transforms into a purple MV Agusta F4 retroSBK motorcycle. This purple one is seen getting hit by fire from Decepticons in the final battle after telling Sam that they would cover his path to Optimus; but is does not appear that she was killed. It is unknown of who she is because in the movie her name is never mentioned. Some people believe it could be Firestar, Moonracer, or, by some miracle, a revived Elita-1 (In The Reign of Starscream No. 4, Starscream "sacrificed" Elita-1 and four others in a failed attempt to make a new AllSpark.). The name Flareup is listed in Wikipedia, however Wikipedia is never 100% accurate as anyone can edit it. Concept art of Flareup Here.
Mudflap and Skids - Also known as The Twins, They start the film by combining into a pink and white ice cream van. Skids makes the front end of the van, while Mudflap makes the back. These Autobot infiltrators later on upgrade to a Green Chevrolet Beat (Skids) & a red Chevrolet Trax (Mudflap). Mudflap is very hyperactive, while Skids believes himself to be the smarter of the two and tries to come across as mature, but nevertheless appears unable to keep quiet. Concept art of Skids Here,Concept art of Mudflap Here, Concept art of both of them togeather Here.
Wheelie - A blue radio-controlled toy monster truck. Wheelie initially serves the Decepticons, but because he is frightened of them he joins the Autobots. Concept art of Wheelie Here.
Jolt - A blue Chevrolet Volt. Being an electric car, Jolt's weapons are a pair of electric whips. He was a last-minute addition to the cast as General Motors, the film's car supplier, wanted to promote the Volt. The writers had already wanted to include the car in the script before the Writers Guild strike, so they had to work out a character that would fit well within the Autobot team afterwards and convince Bay to approve the addition. Jolt has very little screen-time in the movie; his only prominent moment being when he uses his electric whips to help Ratchet attach Jetfire's body parts to Optimus. Concept art of Jolt Here & Here.
Sideswipe - A Silver Chevrolet Corvette Stingray Concept. He is an expert fighter with his swords and tries to get in close with his opponents. After Arcee and her sisters failed to stop Sideways from escaping, Sideswipe arrives and swiftly slices the Decepticon in half (whilst he is still in vehicle mode). Concept art of Sideswipe Here.
Jetfire - A self-described mercenary, an ancient former Decepticon who transforms into a SR-71 Blackbird. His wounds and age have made him choose to become an Autobot. He sacrifices his life so his parts can be combined with Optimus to give him the strength needed to destroy The Fallen. Concept art of Jetfire Here.
The Dynasty of Primes - The seven original Transformers, a group of which The Fallen was once a member and now are only six members, they only appear in a flashback scene where they battle The Fallen because he had ignored their one rule "Sun Harvesters were not to be used in solar systems containing life" which The Fallen ignored and this sparked the war between the Autobots and Decepticons , the six Primes sacrifice their lives in order to seal and hide the matrix from The Fallen because as Jetfire said, The Fallen was stronger then his brothers (The Six Primes), they appear when Sam dies, he has a vision of the Dynasty of Primes and they tell him he has earned the Matrix and this was always his destiny. The Dynasty then resurrects Sam, who in turn brings back Optimus Prime. Optimus then kills the Fallen. They do not Transform into any vehicles. Only three of the six Dynasty of Primes speak to Sam. Screenshots of the Primes Here.
RETURNING DECEPTICONS
Megatron - The Decepticon leader. Killed and thrown into the Laurentian Abyss(along with Blackout, Brawl and Bonecrusher) in the first film, he is resurrected by the Constucticons (one of which is sacrificed for the process) and The Doctor as a Cybertronian tank that can also fly. He has become stronger as a result of absorbing the Allspark fragments that originally killed him. When reviving the character, the writers chose not to rename him Galvatron so as to not confuse the general audience. Megatron survives the events of the film; retreating into space with Starscream after The Fallen is killed. Megatron reluctantly complies with this, whilst as the same time noting that ''this isn't over''. The comic book adaption shows him returning to the Nemesis and awakening more Decepticons from stasis, this scene was supposed to be used in the movie and was written in the script but was cut out because their was no more budget left for the effects to use for Megatron, Starscream and the hatchlings. Concept art of Megatron Here.
Starscream - The Decepticon air commander who transforms into an F-22 Raptor Fighter Jet. He flew into space at the end of the previous film, and now returns bearing Cybertronian symbols on his body due to his coronation. He led Megatron's armies in his absence, but is relegated to second in command when his leader returns to life. He again, survives the events of the movie; suggesting himself to Megatron (in a manner very reminiscent of his G1 counterpart) that they retreat after The Fallen is killed. Concept art of Starscream Here.
Scorponok - A metallic scorpion-like minion of Blackout, he dissapeared into the sands and losing his tail after a battle with Lennox and his team in the first movie. Scorponok hid in the desert and repaired his tail. He reappears in the final battle in which he attacks and badly wounds Jetfire, before he is destroyed by the ancient Transformer. Concept art of Scorponok Here.
NEW DECEPTICONS
The Fallen - One of the original thirteen Primes who created the Transformers, he was banished and stripped of his name for his willingness to destroy life in the search for new Energon. It is he who corrupted Megatron into forming the Decepticons. His toy transforms into a Cybertronian aircraft but he only appears as a robot in the movie. He is first seen in the movie recovering from his long imprisonment aboard the Decepticon ship, the Nemesis. He instructs Megatron to find Sam Witwicky and also tells him that only a Prime can defeat him; and that Optimus is the last one left. The Fallen regains his strength after Optimus is seemingly killed by Megatron and heads to Earth with more Decepticons. After arriving in Egypt, he attempts to power up the recently revealed Harvestor, but is stopped by Optimus Prime, who fights and kills him. Concept art of The Fallen Here.
Soundwave - Megatron's intelligence officer. He appears as a Cybertronian spy satellite that exploits the military's own communications network, coordinates the Decepticon offensive, and deploys Ravage. The Soundwave toy has robot, jet and satellite capabilities, but he only appears as a satellite in the movie. Pitchure of Soundwave in the movie Here. Concept art of Soundwave Here.
Ravage - A minion that resembles a large one-eyed jaguar that transforms into a missile. Ravage is one of the minions of Soundwave, and is launched into the sea near NEST's base to retrieve the Allspark shard. The original growls and snarls by Frank Welker from the G1 series are being used in Ravage's new incarnation. He is later ripped apart and killed by Bumblebee during the climax in Egypt, after attempting to attack him from behind. Concept art of Ravage Here.
Blackout or Grindor -This Decepticon transforms into a CH-53 Super Stallion, a robot greatly similar to Blackout from the 2007 movie. Grindor shares both Blackout's MH-53 Pave Low helicopter alternative mode, and his robot model, being only differentiated by a lighter paint job and different head model, he was mistaken to be Blackout in the movie but since Blackout was not seen resurrected, its safe to assume its Grindor, his name is Grindor in the toyline and in the game spin off but in the movie his name was never mentioned, Writer Roberto Orci has confirmed he had never given the character a name, which could be either Grindor or Blackout. His role is very short, as he is the one that takes Sam and his friends to Megatron and the Doctor. He is killed by Optimus during the forest fight. Blackout/Grindor in the movie Here.
Sideways - A silver Audi R8. He is hiding with Demolishor in Shanghai until he is discovered by the Autobots. He is destroyed by Sideswipe in the beginning of the movie. Sideways was killed almost too quickly for the audience to get a good look at him. His name is never mentioned. Concept art of Sideways Here. It is now widely believed that the Decepticon seen in the movie was just a unnamed random decepticon as Sideways has been revealed to be making an apparance in the third movie
Demolishor - A red Terex O&K RH 400 hydraulic mining excavator, who is the protector of a small Decepticon community in Shanghai. He is killed by Optimus and Ironhide in the beginning of the movie, before his death his last words are "The Fallen shall rise again" after which Prime shoots him one final time in the head. Note that Demolishor is called ''Wheelbot'' in the credits. Concept art of Demolishor Here.
''Constructicons / Devastator'' - A 46 feet (14 m) tall (hunched over) massive robot formed by several combining construction vehicles, who walks in a four-legged fashion resembling a gorilla. He is physically unable to stand upright, but would be 100 feet (30 m) to 120 feet (37 m) tall if he did. Gears and turbines in his body produce a suction vortex in his mouth which devours machinery and debris. He also uses grappling hooks to climb the giant pyramid in the final battle because his size prevents him otherwise. Concept art of Devastator Here.
In the first film, the name "Devastator" was mistakenly given to Brawl, a tank (Brawl may have called himself 'Devastator' because he thinks it sounds more threatening - much like Michael Bay's reason for giving him that name). Long Haul, Rampage, Mixmaster and Scrapper are seen heading down to the bottom of the ocean in hunt of Megatron's corpse, ultimately reactivating their fallen leader. One of the robots is cannibalized for parts to achieve this: the identified robot was confirmed as Scrapper. Not all of the Constructicons are not seen in robot mode and their names are never mentioned in the movie except for Rampage.
Mixmaster - The leader of the Constructicons. He transforms into a black and silver Mack cement mixer truck, forming the head. There appears to be 3 Decepticons who share the same form and resemblance that is Mixmaster. One of them is brought to life on a ship along with Scrapper, Longhaul, & An unnamed Constructicon turning into a yellow Volvo EC700C crawler excavator. The other one is destroyed when Devastator is hit by the rail gun while on top of the pyramid, and the third is killed by Jetfire while he is in his "battle" mode. Concept art of Mixmaster Here.
Rampage - A yellow Caterpillar D9 bulldozer who forms the left leg. There appears to be 2 Decepticons with the same form that is Rampage, however the one that is referred to as Rampage, is the one who holds Sam's parents hostage and is soon after defeated by Bumblebee. The other one can be seen when merging with the other Constructicons. Note that Rampage is named ''Skipjack'' in the credits; but he is referred to as "Rampage" by Starscream. Concept art of Rampage Here but he is red in the movie.
Scrapper - A yellow Caterpillar 992G scoop loader who forms the right arm. Again, their appeares to be 3 Scrappers, One of which was killed by his fellow constructicons brutally cannibalising him when Scalpel demanded more parts for rebuilding Megatron in the bottom of the Laurentian Abyss where Scalpel referred to him as "the little one". In the film's climax, another Scrapper in vehicle mode is seen merging with the other six Constructicons to form Devastator; this one is killed when Devastator is destroyed by an experimental rail gun. Lastly, there is one seen pursing Sam and Mikaela (in his robot mode) in Egypt during the final battle, he is killed with Long Haul after some fighter jets drop bombs on them. Concept art of Scrapper Here.
Overload - A red articulated dump truck that forms the torso along with Scavenger. Overload was not seen in Robot mode. Concept art of Overload Here.
Scavenger - A red Terex O&K RH 400 hydraulic mining excavator, closely resembling Demolishor. He forms the torso along with Overload. Like Overload, he was not seen in Robot mode.
Hightower - A yellow Kobelco CK2500 crawler crane that forms the left arm. Like Overload and Scavenger, he was not seen in Robot Mode. Concept art of Hightower Here.
Long Haul - A green Caterpillar 773B dump truck, which forms the right leg. Long Haul's individual robot mode was designed by freelance artist Josh Nizzi as fan art of the original character. The fan art impressed Bay enough to hire him on to the film. Again, there appears to be 3 Decepticons who share the same form and resemblance that is Longhaul. One of them forms the right leg of Devastator, another is brought to life on a ship along with Mixmaster, Scrapper, & An unnamed Constructicon turning into a yellow Volvo EC700C crawler excavator, while the other was fighting the Autobots (in robot mode) in the final battle in egypt. He is later killed along with Scrapper after fighter jets drop bombs on them. Concept art of Long Haul Here.
-An unnamed Constructicon turning into a yellow Volvo EC700C crawler excavator with a Stanley UP 45SV universal processor attachment, seen only briefly in vehicle mode in the freighter when the Constructicons first arrive, he was in robot mode when the Constructicons jumped into the ocean but the camera angle was far for the audience to get a good look at him, he was seen under water with Mixmaster and Longhaul but the water made it difficult to see how he looked like. This could not have been Hightower because he turns into a yellow Kobelco CK2500 crawler crane.
-An unnamed Decepticon has Bonecrushers vehicle form, the Buffalo H Mine-Protected Vehicle also features in the desert battle, he is seen driving alongside the Decepticon protoforms who are rising from the sands but it is unknown if he is actually Bonecrusher or just another Decepticon with the same resemblance as him.
*According to the creators of the film, the Constructicons exist not as individuals, but as a legion of robots who each have one of seven body types. This is why Long Haul (Green Dump Truck), Rampage (Bulldozer), Scrapper (Yellow Scoop Loader) and Mixmaster (Cement Mixer) are fighting Bumblebee's group, while also seemingly being part of Devastator at the same time.*
*It should be noted that when it comes to the Constructicon toys that combine to make Devastator; for some reason, Overload is not Included. Only Mixmaster, Rampage, Scrapper, Scavenger, Hightower & Long Haul.*
Scalpel - A small, spider-like robot who turns into a microscope. He is a medic and scientist equipped with tools he is seen using to resurrect Megatron and extract All Spark data from Sam's brain. The other Decepticons call him "The Doctor". The packaging of his Scout-Class figure details he is skilled in dissecting and rebuilding almost any living organism. He later is used to torture Sam Witwicky when Sam, Mikaela and Leo are rescued by Optimus Prime and Bumblebee. However, while the novel and comic books show that he is destroyed by Prime, the movie leaves his fate unclear, as he suddenly disappears after Prime intrudes and begins battling Starscream and Megatron. Concept art of Scalpel Here.
Alice - A Pretender who stalks Sam. She is portrayed by Australian actress Isabel Lucas. Her origins are unknown in the movie, but the tie-in adaptations show her copying the appearance of an animatronic Alice in Wonderland model. Beneath her Pretender shell she is a dangerous humanoid robot with several weapons. She is killed by Mikela, who crashes into her with her car. Concept art of Alice Here.
Reedman - Name not known. They are hundreds of tiny ball-shape insect size Decepticons that may be Insecticons. It turns out to be a robot formed by some nanobots dropped by Ravage, and can combine to form a cat-like robot similar to the first movie's Frenzy. The movie names this cat-like form "The Thin Man" or "Thinman," variously, his name is revealed to be Reedman. Concept art of Reedman Here.
Insecticon - Seen very briefly as a spy working for the Decepticons, He discovers where Sam and Mikela are hiding in Egypt, only to be ripped in half by Sam, which ultimately tips Starscream off to their postion. Screenshot of an Insecticon Here.
-A Decepticon resembling Brawl from the first movie also features in the desert battle.
There will be other minor robots, including some robots who can transform into weapons and some cooking appliances brought to life by the All Spark shard, including the toaster bot from the Mountain Dew tie-in advert for the first film, Concept art of a Microwave bot Here and Concept art of a Toaster Bot Here (Named Ejector in the toy line). There is also a brief cameo of Frenzy. His decapitated head is seen in a jar in Simmons' possession, with Simmons commenting that it is "still radioactive", at the end of the first film, Frenzy was killed by his own weapon cutting his head in half but in this sequel in the freezer in Simmon's secret room the head is under a glass case and is fully intact. However, it's possible that Simmons repaired the head to at least turn it into a worthy looking trophy. Also Bonecrusher's vehicle mode from the 2007 film also makes a cameo appearance among the forces in Egypt.
Their are also two Decepticons that look alike (see here). Who they are is yet unknown.
Writers Roberto Orci and Alex Kurtzman have stated that their are ''10 un-named robots in this movie''. Several Decepticons with only Cybertronian forms feature in the movie and the final battle.
Also seen in the movie are Decepticon protoforms (i.e. infant Transformers) aboard the Nemesis, where it is revealed by Starscream that lack of Energon means that they are dying.