A Japanese-exclusive, the final new-design G1 Convoy toy was a departure from previous versions. He now transformed into a small extended hood cab truck of made-up model pulling an implausibly large trailer equipped with motorized caterpillar treads. The trailer could additionally pull along the auxiliary trailer transformer Grandus, on which the shuttle Sky Garry could land, forming the spaceship "Battlestars". Even without combining, Star Convoy's truck mode was a behemoth, including a Micro Trailer semi as a small accessory and an upgraded Roller that was now patterned after a tracked ballistic missile carrier.
After a period of effective leadership, which saw the activation of several new Transformers including the Aerialbots, who Prime infused with life using the Matrix, Prime engaged Megatron in a video game duel for possession of a super fuel. Prime was victorious, but Megatron implemented a cheat code that killed Prime later. Autobot surgeon Ratchet's subsequent efforts to restore him were unsuccessful, and his body was launched into space. The Autobots were unaware of the presence of the physical Matrix within the corpse. The funeral barge eventually crashed on a giant moon and, as it lay there for an untold time, the Matrix reached out to nearby living organisms, studying and recreating them.
The color scheme of this special redeco of Super class Optimus Prime was decided through a colouring contest held in the December 2004 issue of TV Magazine, in which entrants coloured in lineart of Prime in the scheme they wanted to see. The winning entry rendered Prime in a... distinct palette of grey, cream, dark red, and purple chrome, with blue, white, and yellow drones. It was limited to only ten pieces, making it one of the rarer Transformers toys in existence.
QT-M Optimus Prime is a redeco of the GT-R Optimus Prime mold in the colors of the Transformers-sponsored Nissan GT-R used by the Team Mach racing team (a vehicle previously used as the base for non-toy character Mach Five Racing Prime). Like Transformers GT's Safety Prime, this toy was a collaboration with the Super GT racing series and was given away free to young children who attended TakaraTomy-sponsored "Kids Walk" events held by Super GT in the fall season of 2015.
The lowest priced toys in the Armada line were three-packs of Mini-Cons. Each larger price point consisted of an Autobot or Decepticon who came with a Mini-Con partner. Mini-Cons could be used to unlock a variety of features on each larger robot, such as firing weapons, electronic lights and sounds, or alternate modes. Some three-pack Mini-Cons combined into other forms or had additional features. According to the storyline, Mini-Cons also enhanced the power of other Transformers, giving incentive to collect as many of them as possible.