He next appears in Transformers: Energon, the only time during the Unicorn Trilogy where Prime is not the main protagonist. In Energon, set ten years after Armada, he is no longer able to combine with his trailer. Instead, he has been gifted with the Spark of Combination by Primus, allowing him to combine with the quartet of vehicular drones in his trailer. Fire One, Copter Two, Digger Three, and Submarine Four, can each form either an arm or a leg when they combine with Prime, creating his super mode. Later, Prime gained the ability to combine with fellow Autobots Wing Saber and Omega Supreme, the latter case creating Optimus Supreme.
The set also includes a redeco of Generations War for Cybertron Optimus Prime figure, which changes the original figure's dark red plastic to a brighter, more vibrant red, changes the gray plastic to a darker charcoal tone, changes the "windows" from gray to nearly black, and replaces most of the original figure's pink-ish red paint details (which were yellow on the redeco from the "Rage over Cybertron" three-pack) to teal.
In "Mission Accomplished", Optimus is pressured by Sentinel to tell Ultra Magnus that his story about the Decepticons is untrue, but he refuses. Meanwhile, the on-board computer plots a train infused with a shard of the Allspark. When Ultra Magnus and Jazz set off there, Optimus suspects that the Decepticons are luring them into an ambush and rushes to their help, though Sentinel Prime tries to detain him. At first, Ultra Magnus doesn't believe him, but a short time later, Optimus is proven right as Starscream falls from the sky after being blasted by Megatron, much to Sentinel Prime's astonishment and fright. Starscream turns out to be alive, inflicting injury on Ultra Magnus. Optimus takes the affair into his own hands momentarily and, with Sentinel's aid, manages to apprehend the Decepticon. While Sentinel Prime deflects Starscream's shots with his power-shield, Optimus succeeds in taking Starscream by surprise and handcuffing him. When the shackled Starscream is delivered to the Elite Guard spaceship, Ultra Magnus admits Optimus Prime was right and allows him to stay on Earth in order to seek out the other fragments of the Allspark.

One of the taglines of the Transformers universe is “more than meets the eye.” It’s meant to suggest, of course, that these robots are not just robots; they can turn into vehicles and boomboxes and dinosaurs. But some of the characters themselves tend to be more than meets the eye. In fact, they can become other Transformers. Megatron becomes Galvatron, Orion Pax becomes Optimus Prime, and Bumblebee becomes Goldbug.
Main event time! Nitro figures are more like your traditional Generations/Power of the Primes deluxe bots. Standing at 7-inches, they feature increased detail, additional paint applications and all come with a core to unlock additional features. In addition to Barricade, Optimus Prime, and VW Bumblebee (this one’s my favorite of the entire line), the Nitro series will also have a Camaro ‘Bee.
Due to the interference of Ravage, the same as the one who appears in the Beast Wars, most of the events of the original animated feature do not transpire. The most influential of these events is the Battle of Autobot City. Because this battle did not occur, Optimus Prime and Megatron do not have their final showdown. This means that, for this continuity, Optimus Prime does not die and Megatron is never reformatted into Galvatron. As a result, Optimus Prime is able to lead the Autobots during the Binaltech saga.
While exploring Cybertron's hemisphere of darkness, Optimus Prime became severly damaged, and unable to return to the hemisphere of light. Having been able to send out one last message before his memory was badly damaged, Optimus found himself unable to distinguish friend from foe, and would join (or rejoin) whichever faction found him first. Optimus Prime Is Back

Refractor and Laser Prime were only available in a box set named "Chaos on Velocitron" that includes Dynamus and Quickswitch, Parsec and Autobot Nautica, Fastclash, and a Rodimus Prime Titan Master head. The set was officially announced by Hasbro to be a Toys"R"Us exclusive, and was sold at stores in the United States, Canada, and Hasbro's Asian markets (such as Malaysia, Singapore, and Hong Kong). Despite this, it later became available via Amazon in the United States (but not in Canada) as well, actually sold by Amazon directly (as compared to a third-party seller).
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
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