 Dr. Eggmans name was changed to Dr. Ivo Robotnik for all English  language versions (see alternate versions). He would retain this  name for all his English language appearances right up until  _Sonic Adventure (1998) (VG)_ (qv), when it was intentionally phased  out and restored to Dr. Eggman, presumably because that game  heralded Sonics return to glory and there was a desire for him to  return to his roots. However, the Robotnik name was officially  acknowledged in _Sonic Adventure 2 (2001) (VG)_ (qv), even in the  Japanese continuum.