Robo-Joe (メカージロウ, Mekaa Jirō, Mecha Jirō) Created by Laura's grandpa, Robo-Joe is a robot hamster whose appearance seems to be based on Hamtaro. Robo-Joe's main function is the ability to learn and mimic what he hears; both human language and Ham-Ham language. In a later Japanese episode, Laura's grandfather places a slightly modified Robo-Joe in a Battlebots-like tournament.