Kantaroth

Rintaro's Medarot, many believe him to be Metabee when he first appears. He is also a Hercules Beetle type, and appears identical to Metabee, only more streamlined since he is a later model. He has the same cannons and Seeker Missile attack that Metabee does. When he talks, he has a rather stonier personality to him.

(Source: Wikipedia)