EF-DC1998 was created by Dr. Eggman as a part of his Egg Fighter robot line. In his youth, he was a model mainstay of the Egg Fighters, but over time, EF-DC1998 became tired of the long working hours in Dr. Eggman's forces, and he started to sneak away from his work and avoid his duties. At the time Eggmanland was built, EF-DC1998 was designated as a shopkeeper for Eggmanland's local shop.
Unlike most of his robot brethren, EF-DC1998 is a slacker and would rather try to avoid his duties than work on them.
- The "DC1998" in EF-DC1998's name is a reference to Sonic Adventure, which was released for the Sega Dreamcast in 1998 in Japan.