Comadog (コーマドッグ), english name Komandog, is the only COM-type Medarot based on a guard dog and is specialized in Beam attacks. It first appeared in Medarot 1.
Comadog has a resemblance to a komainu, this is, a guardian dog, with a wheel as his legs. However Comadog is specialized in Beam attacks, and thus, is able to do a huge ammount of damage, while sacrificing his speed and precision. His legs don't make him suit to battle in sand, but in hard, flat terrains.
In the anime
He is seen by the first time as owned by a boy named Tateyama. Ikki challenges him to a Robottle, tying his Metabee's arms. Despite that Ikki wins the Robottle with relative ease. This happened prior to changing Metabee's parts to Saikachis's.