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Transformers Autobots - Revenge of the Fallen
OPTIMUS PRIME
Optimus Prime (Peter Cullen), the Autobot leader. He retains his alternate mode of a blue Peterbilt truck with red flame decals. Cullen recorded a voiceover for the opening scene in August 2008, but began the majority of voice work in November. A live action cameo has been written for Cullen.

BUMBLEBEE
Bumblebee (Mark Ryan), the Autobot who befriended Sam and disguises himself as his fifth-generation Chevrolet Camaro. Ryan also continued his role as stand-in for the robots on set. Bumblebee's voice is still healing and he still uses radio soundbites to express some of his emotions. Sam cannot take him to college as they do not allow freshmen to have cars on campus, and he'll also be forced to leave the Witwickys' garage due to an incident that resulted in Bumblebee wrecking their house.
The filmmakers used the Super Sport version of the 2010 Camaro rather than the concept version. Ed Welburn, vice president of GM Global Design, said the redesigned car emphasized Bumblebee as becoming stronger after having his severed legs reattached in the first film: the new intakes and spoilers show he is a sturdier character.
IRON HIDE
Ironhide (Jess Harnell), the Autobot weapons specialist who transforms into a GMC Topkick. His right eye has a large scar surrounding it. Before arriving on Earth, he sustained a broken ankle. According to the tech specifications of his toy, he was built during the Battle of Tyger Pax and is one of the oldest Autobots. His weapons include laser cannons mounted on each forearm with missiles connected around the outside of the right forearm laser cannon. Despite his advanced age and extra bulk, Ironhide revealed himself to be extremely agile and formidable opponent - He managed to helix twist over a screaming civilian at high speed while firing both wrist mounted weapons, and was seen engaging and withstanding assaults from both Devastator and Starscream.
RATCHET
Ratchet (Robert Foxworth), the Autobot medic who transforms into a search and rescue Hummer H2. His weapons include a rotary saw that emerges from his left arm, and can transform his right arm into a machine gun. Ratchet also has an assortment of other tools at his disposal; in the movie, he uses a red laser to scan and try to calibrate Bumblebee's voicebox as they are introduced to Sam Witwicky and Mikaela Banes. He has enhanced senses, as he reveals Sam's desire to "mate" with Mikaela by sensing his pheromone levels by using his nose. According to the book Transformers - Meet The Autobots by Jennifer Frantz, Ratchet has X-ray vision. According to the Transformers U.K. magazine Ratchet can produce a "chameleon" effect with his surface photo-electric cells allowing him to blend with his environment.
JETFIRE
Jetfire (John Turturro), a former Decepticon who transforms into a SR-71 Blackbird. His wounds and age have made him choose to become an Autobot.He can combine with Optimus, as they did in the Transformers: Armada series, which provides Optimus with the ability to fly. The writers wanted a geriatric robot, and during scripting they gave Jetfire that personality.He creaks, does not transform well, and is said to be running out of Energon. Also, he walks with a cane, which doubles as a battle axe. In the movie, he is found in the Steven F. Udvar-Hazy Center by Agent Simmons and Sam, who break into the museum at night and reactivate him by using the AllSpark shard. Turturro offered to voice the character because he thought it would be a fun part.
ARCEE
Arcee, a female combiner made up of three separate robots that transform into motorcycles. According to the novelization, the robots that make up Arcee share a single consciousness. For her toys, however, each individual bike was given a character and personality. Arcee, who initially transformed from a single bike, was dropped from the first film due to concerns of her being too small compared to the other bots and the fact that the writers felt there was not enough time to explain her "gender", despite her and several other female Transformers appearing in the first film's toy line and tie-in comics. Whether to explain robotic gender or not was something the writers were unsure about, and it remained undecided until post-production. The motorcycle vehicle modes for Arcee were provided by custom sportsbike builder retroSBK.
- A pink motorcycle, named Arcee in the toy line.
- A blue motorcycle, named Chromia in the toy line. In the 1980s cartoon, Chromia was Ironhide's girlfriend, something reflected by the film version's toy biography, which states Chromia was "friends with Ironhide for centuries, and their reunion on Earth was one of the high points of the war for both of them. Now they work side by side, hunting and destroying Decepticons. Neither of them has ever been happier."
Mudflap and Skids
Also known as the Twins, these Autobot infiltrators transform respectively into a red Chevrolet Trax and green Chevrolet Beat. 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. Bay compared the message of the bumbling but heroic characters to the story The Little Engine That Could.He chose the Beat and Trax for the Autobot twins because he thought those two small cars looked good together.Ed Welburn added when they had designed the cars before Bay selected them, the "character" they wanted to bring to the concepts was a sense that small cars could be as cool as large ones. The Twins have the ability to combine. They start the film by combining into a pink and white ice cream van, and at some point they combine to form a bigger robot.
SIDESWIPE
Sideswipe, a silver Chevrolet Corvette Stingray Concept. He is an expert fighter with his swords and tries to get in close with his opponents. According to the writers in panel at Botcon Sideswipe was originally scripted to be a Lamborghini like his Generation 1 counterpart, but Bay had his choice of cars and went with the Stingray.
JOLT
Jolt is 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.Welburn was pleased the Volt's character was christened Jolt by the filmmakers, as it reflected that car's design "character".
WHEELIE
Wheelie, a blue radio-controlled toy monster truck. Wheelie initially serves the Decepticons, but because he is frightened of them he joins the Autobots.

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