Mystery Medabot

A mysterious Medabot has come to town. This metabot goes by the name Rokusho. Ikki and his pals see him saving a puppy and they realize that he is faster than any Metabot they've ever seen. Metabee finds out that Rokusho is a loner Medabot with his past shrouded in mystery. Meanwhile, the Rubber Robo Gang is off making mischief and when Ikki's house gets attacked, Rokusho helps Metabee fight them off. While the day is saved, who is Rokusho, and where is he from?