In "Reunification", Optimus is seen building his new ultimate weapon, Omega Doom. He learns that Megatron has supposedly been killed by watching a broadcast from the Autobot reporter Rook. When Kup leads the Autobots Camshaft, Hound, and Warpath, in an attempt to assassinate Optimus Prime, the Autobot leader easily defeats the four rebels. Alpha Trion then attempts to kill Optimus, but Optimus uses Omega Doom against the ancient robot. Prime then sends Doom against the Decepticons.
A later prototype/mock-up was much closer to the final product but still has some noticeable differences, such as a head with much larger antennae, longer smokestacks and a front grille section that includes the rectangular section that would sport the "Freightliner" logo on the real-life truck (on the final toy, the rectangular section is part of the hinged upper section that includes the windows). It would have also been possible to attach the ion blaster to either of his shoulders.
A five-inch tall, non-transforming highly-articulated PVC figure of Optimus Prime in his Super Mode was the eighth entry in Takara's Mega Super Collection Figure series. In addition to a non-transforming figurine of Sparkplug, Optimus comes with two sets of alternate hands—one set with spread palms, one curled into fists—and is armed with his Convoy Gun, which can either peg into his right fist (and only his right fist) or onto his back.
This release of Buster Optimus Prime was susceptible to a paint scraping issue on the silver painted slide-out barrel of his blaster. This problem was fixed for the DOTM Re-release by relocating the silver paint app from the barrel to the inside wall of an exposed gas tank that had been previously left as unpainted grey plastic. The black paint app on the barrel was left unchanged.
After many battles on Earth, Optimus died by standing purposefully in the path of the Hydra-Cannon built by Megatron from the three Mini-Con weapons, the Star Saber, the Skyboom Shield, and the Requiem Blaster. He managed to partially reflect the beam, damaging the Hydra-Cannon. It was the Mini-Cons themselves, however, who resurrected him, entering the Matrix and reconstructing a new body for him. Subsequently, Unicron forced Optimus to face the dark part of his soul and that, on some level, he enjoyed the thrill of combat. Following Unicron's defeat, Optimus's denial was sorely tested as Galvatron, an upgraded Megatron, forced him into one final furious battle. The battle ended when Starscream sacrificed himself to end the circle of hate that powered Unicron. Floating through space, Optimus found the Matrix, but said he did not deserve it. Before beginning the battle with Galvatron, he was upgraded by the minicons. His red torso turned black and he was able to battle Galvatron one on one.
Inspired by the 1985 promotional version of Optimus Prime that featured Pepsi stickers on his trailer, this outlandish incarnation of Prime is a slightly altered version of Takara's 2005 Pepsi Convoy figure (which represented a different character to Prime). The figure was only sold by Hasbro Toy Shop at various conventions, and given away as a promotional prize by Pepsi, via their Mountain Dew brand.
Hero Optimus Prime was the first new-mold Optimus Prime toy in the Generation 2 line. He transforms into a Kenworth truck of unknown model with a flatbed trailer. The truck and trailer form his robot mode, but cannot disconnect. His primary gimmick is an air-powered missile launcher that uses an air bellows attached by hose to launch his large, hollow, soft-rubber-tipped missiles. The bellows and missiles attach to his back in robot mode. His rifle plugs into the launcher's main body in truck mode.
Each arm features flip-out blades that trigger when a button on the forearm is pressed. Each of these blades has a Cyberglyphic symbol on it. The blades severely restrict Prime's arm articulation when retracted, as they get in the way of the kibble, but as there is very little one can do with Prime's arms without causing the blades to deploy, this is hardly noticeable.
The Monster XL also features not one, but TWO barrels with 6 different nozzles per barrel. That adds up to about 36 different ways to put out your best friend's eye. The ludicrous weight and the fact that it takes 43 fucking pumps to get the water up to pressure offer up reasonable disadvantages, but since water gun fights are always half water gun fight and half "who brought the biggest dick" competition, none of that really matters.
Hot Rod then fought in the battle of Autobot City and saved the city for if he had not attacked Megatron, he would have destroyed it. Due to his attempted intervention in the epic battle between the Autobot leader, Optimus Prime and the Decepticon leader, Megatron, Prime was lethally injured. Before he died, the Matrix got passed on to the Autobot Ultra Magnus, whom he referred to as "old friend", despite protestations.
When Sideswipe was accused and convicted of destroying the Nova Suspension Bridge, Optimus was infuriated that one of his own Autobots could commit such a heinous act. Optimus was tasked to hunt down and deactivate Sideswipe, though the task proved to be easy as Sideswipe did not run, hide or resist. After Optimus had deactivated Sideswipe, he was approached by Prowl, who pointed out that Sideswipe's actions made little sense, as he had committed the crime in broad daylight before many witnesses. Agreeing that the Decepticons might be behind the situation, Optimus allowed Prowl to take a team of Autobots to Carob Island to clear Sideswipe's name while Optimus and Jazz stayed behind to continue working on human/Autobot relations. Prowl returned with evidence that it was indeed a Decepticon-controlled clone of Sideswipe that had committed the crime. Optimus then presumably reactivated Sideswipe when his name was cleared. Deadly Paradise