Motorarm is the middle child of the Jointron brothers. But just like his brothers, he enjoys partying and speaking with lousy Spanish. He is currently in training and belongs to the Trias Room of Universal Sumo Association. He says that his secret is energon chanko-nabe (a filling stew that is a staple of the sumo wrestler’s diet). Motorarm decided to travel to Gaea and join in the war to build up a better warrior's spirit and hopefully drain away a little of his excitable nature. It doesn’t look like even the horrors of war are going to accomplish that.