Trebechemon is a Cyborg Digimon based on a Trebuchet and a Rhinoceros Beetle. Trebechemon was designed in an alternate timeline in which the Digimon Ballistamon had it's own, actual Digivolution line rather than relying on Xros Evolution. This is Ballistamon's Ultimate Stage, and at first, not much can really be said about the design. Shoutmon describes it as weird looking, but enemies that also think that begin eating their words when Trebechemon attacks with either a spiked mace it can launch at the opponent like a ball and chain, or use this same weapon as a gatling gun. If that wasn't imposing enough, perhaps using it as BOTH is more than enough to send it's enemies running.
Trebechemon is the Ultimate Form of Shockmon, and is the direct digivolved form of Ballistamon.