Artwork of the Ghola Badnik from Sonic Advance 2

Sol (also known as E-31 Gola) is a spherical Badnik / E-Series robot from the Sonic the Hedgehog games. It appears to be an offshoot of the Orbinaut robot and has the same behavioural patterns, but whereas the Orbinaut had mace balls, the Sol has fireballs.


  • Sonic the Hedgehog 2
  • Sonic Blast
  • Sonic Adventure
  • Sonic Adventure 2
  • Sonic Advance 2