Eggman having given up on the E-100 series, began creating the E-200 series robots. Eggman sent E-201, the 1st robot in the E-200 series, to search for chaos emeralds. When E-201 returned with a blue chaos emerald, Eggman created E-203 & E-204, 2 powerful twin robots that could come together to perform several combined attacks! E-203 & E-204 teamed up & proved to be more than Sonic & Tails could defeat!