Later, Optimus pursued Megatron to Earth to stop him from pillaging the planet's energy resources. Prime's loyal team of Autobots clashed with Megatron's Predacons on many occasions, stopping their schemes with the aid of Koji, a human whose father had been abducted by the Predacons. Prime and Koji went on to form a strong friendship, although Prime blamed himself for Koji's father's abduction. Optimus proved his bravery on many occasions, battling and defeating Sky-Byte in an underwater duel and personally rescuing Side Burn from a Predacon trap. Later, when Megatron targeted a tanker truck to scan as the alternate mode of the final protoform, Optimus Prime leapt into action in order to save the truck's human driver and, as a result, the tanker, Prime and the human were all scanned. With an infusion of Megatron's spark energy to complete the concoction, Scourge was born, emerging from his pod as a dark twin of Optimus Prime. Prime's pleas to make Scourge remember his original Autobot loyalties fell on deaf ears.
The Autobots helped repair a Smitco Oil Refinery site which the Lazarus-controlled Transformers had attacked. Optimus had no answer for Spikes accusation that the Transformers' presence on Earth was responsible for the destruction. When Megatron's activities at Lazarus's base were spotted by the military, Optimus insisted on the Autobots going in without backup. They discovered Megatron in the middle of a plan to reformat Earth into a new Cybertron using a cyber-virus. Optimus rejected Megatron's suggestion he should just let it happen, but while the two factions fought, the human military unleashed Operation Clean-Up, dropping a bomb on them. Prime Directive #3
Menasor cut off Prime's escape and handed him the Reflector trio, who confronted Prime with a hologram of Serpent O.R. The new Decepticon leader carried Megatron's memories and information downloaded from Soundwave, from which he learned of the Matrix of Leadership. Serpent O.R. offered Optimus a trade: hostages and peace if he handed over the Matrix. Optimus agreed.
Alternators Optimus Prime transforms into an accurate, fully-licensed 1:24th scale Dodge Ram SRT-10. The vehicle mode features rubber tires, functional steering, opening hood, tail gate and doors with a detailed cabin interior. His robot mode body sculpt details are based upon the 20th Anniversary Optimus Prime toy. However, his headsculpt is based upon Powermaster Optimus Prime. He is armed with a small pistol that is formed from his engine.
The Japanese release of the figure also underwent the changes in weapon shapes, but never featured a silver Roller; instead, their original release of Prime featured a Diaclone-style Roller without the two rear pegs, and the differently-shaped launcher that accommodated him, before a running change switched over to the Hasbro version of the mold. Finally, in some European countries, Prime sported red feet, as opposed to his traditional blue; this version of the figure is also known in some cases to feature a differently-painted forehead crest which leaves the three central indentations unpainted blue.
The original 1984 Optimus Prime toy was part of Takara's 1983 Diaclone toy line named "Battle Convoy". It was designed by the creative design team of Hiroyuki Obara, Shoji Kawamori, famous for his work in Macross, and Kohjin Ohno. The toy's characteristics, such as the head design and the use of the cab front as the upper torso, have become design elements in nearly every incarnation and variant of Optimus Prime. This particular toy has been reissued multiple times, mostly to commemorate the anniversary of the transformers franchise. Optimus Prime was also released as an Action Master and Powermaster toy in the original transformers toy line.
Part of the first wave of TakaraTomy Lost Age: Movie Advanced toys, this Japanese-exclusive redeco of 2007 Transformers Protoform Optimus Prime is given a Generation 1-styled color scheme (which is also based on his appearances in IDW's Transformers: Foundation comic-book mini-series). Protoform Optimus Prime transforms into his "entry" mode. This mode somewhat resembles a cybertronic truck, with false wheels sculpted onto the sides, and Optimus Prime's trademark windows in front. His now-blue flame decoration piece fits to the back of the "vehicle", creating the illusion of a flaming comet's tail (Not sure if this was mean to represent his jetpack blast effect or his atmospheric entry heat effect, which is for no reason: entirely blue instead of hot red). The bottom of the vehicle has small wheels to roll the toy across smooth surfaces.