Eriver is the driver of the Shūkan Pokémon Hōsōkyoku (週間ポケモン放送局 ) car. His name is a pun on the English word 'Driver'. He is depicted as an older man but is in fact a younger man dressed like a Chauffeur.
Eriver would drive KABA-chan to his events and activities but would often be stubborn to participate as he wanted to keep up his proper chauffeur etiquette.