The "Underbite Jetpack Takedown" Optimus Kreon uses the new 2015 style of Kreon hips and torso, with a hollow hip-peg and a central post inside the torso for increased grip... which also makes them incompatible with about four years' worth of Kreons. Based on his appearance in Robots in Disguise, he features a new version of the Optimus helmet, this time lacking a moutplate. He attaches to an included jet pack, armed with two pressure-launch missiles.
There is one aspect not looked at in the price and that is the shift to model building vs. creation leading to a change in the utility of the pieces. I seem to need many more sets to get a useful variety of pieces these days as many of the sets contain a lot of pieces that are very specific to the needs of the set and are less useful when one wants to create their own designs. It would be a fascinating addition to rate each of the block types on its utility, perhaps by its prevalence in other sets, and then assess each set on its total utility score. So then the question is how many sets would you need to by to achieve different levels of utility and how has this changed over time.
For the 1987 and 1988 lines, Hasbro introduced even more radical ideas through new sub-groups. The Headmasters and Targetmasters came with partners who transformed into the figure's head or weapon, respectively. Powermasters, including the new version of fan favorite Optimus Prime, came with partners that transformed into engines. Each line would see various permutations over the two-year span, including smaller Headmasters, Double Targetmasters, and a Powermaster with two engines.

Forming a roughly 11-inch figure when fully assembled, Diablock Convoy is highly articulated, using 12 ball-jointed block pieces, giving him a range of motion similar to Masterpiece Prime, with the exception of the head, which can only move up and down, not side-to side. Speaking of the head, it is by far the most stylised aspect of the figure, with no real attempt to approximate Prime's face or mouthplate inside a simplified helmet, mainly featuring only a reversed block that gives the odd impression of a cycloptic eye. It is possibly intended to actually represent his forehead grill, as a yellow block inside his head construction remains barely-visible through a slit in his face, possibly intended to represent the classic toy's yellow eyes.

A Japanese TV Magazine exclusive, this release of the Super-Con class Prime toy has almost all of his parts cast in translucent coloured plastics—hence the 'crystal' moniker—representing the character's disembodied spark after his destruction in the Armada cartoon episode "Crisis" and resurrection in "Miracle". What that means for poor Over-Run (or "Surge" in Japan), also cast in translucent plastic, we couldn't say! Available via mail-order, only 5000 pieces were distributed in October of 2003.

This Japanese-exclusive vacuum metalized golden redeco of Super Base Optimus Prime, whose name means "Shining Golden", was available as a prize in several draws, including a colouring contest held in the pages of TV Boy magazine, and in-store lottery draws at Tobu Department Stores. Between the draws, at least 58 "Kinpika" Prime toys are known to have been given away, making it one of the more widely available Lucky Draw figures, comparatively speaking. It came packaged in a plain white box, and including all the accessories and features of the standard release of the figure, including a gold-chromed Sparkplug (or "Prime", as he's confusingly known in Japan).
This redeco of the Ginrai tooling of the Powermaster Optimus Prime figure (released concurrently with the 2001 reissue of the Ginrai figure) was a Toys R Us Japan exclusive black repaint, made to represent the original Optimus Prime equipped for a special mission. All of his red and blue plastics were changed to black, his clear blue windows were now tinted red, making his overall colour scheme very reminiscent of the now-familiar 'Black Convoy' color schemes.
General Optimus Prime later attended a meeting of the Convoy held by Starscream. There, he assured the others present that he had been mistaken about the rumored Megatron's identity. Starscream was convinced, but the rest of the Convoy were savvy to the truth. The other Optimuses supported General Optimus Prime's decision, stating that if C-81 had earned the General's trust, that was good enough for the rest of them. Optimus was later seen hanging out with Spy-Eye on his off-time. Cybertron's Most Wanted
A perfect example of why I dislike modern Transformers more and more. I'm 22, and when I was younger Transformers were my favorite thing. I still have many of the ones I had back then. But nowadays I'll go to Target or Toys R Us (RIP) and see what Hasbro has been up to, and they're bragging about how this Transformer only takes 5 steps to transform!

For accessories, he comes with (according to his bio) "the ancient weapons of the Primes", such as his Nexus Sword (a reference to Nexus Prime), the Vector Shield (an upscaled, non-transforming version of the shield from his Cyberverse "Beast Blade" toy, and a reference to Vector Prime), as well as a generic cannon with a pressure-fired missile. All of his accessories can peg into his hands, right forearm, backside, and vehicle sides.
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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