The Diamond Dust Zone boss is the fourth boss encountered in Sonic 3D Blast in Diamond Dust Zone, piloted by Dr. Robotnik.


Robotnik's Egg Mobile has been modified with ice nozzles capable of freezing Sonic and encircle around the Mobile. The Egg Mobile can only attack Sonic once it is close enough to the ground. At this point, the doctor will fire the vaporizers around the floor, giving Sonic an opportunity to jump over the freezing vapors and land a hit on the glass cockpit before Robotnik retreats back into the sky. Once hovering above, the Egg Mobile will drop explosive snowmen on the floor below from the bottom hatch of the vehicle before ultimately lowering itself into attack position again. The snowmen will explode after a set amount of time or when Sonic gets too close to them (he could also destroy them without triggering the snowball explosion). Whilst lowered, this would be the only advantage of attacking the Egg Mobile, and the player will need to be cautious of the nozzles and possibly a few snowmen it drops. With every hit on the glass cockpit, the Egg Mobile loses a nozzle and will start to increase in movement speed, and after eight hits, Robotnik's vehicle gets thrashed and smokingly flees the scene.


Name Artist(s) Length Music Track
N/A (Genesis) N/A 1:02
N/A (Saturn) N/A 2:31


  • Once Robotnik is defeated, any remaining Snowmen will instantly explode.
  • Sonic can hit the snowmen to jump higher, but he will take damage if he hits Robotnik underneath the Egg Mobile.
  • This boss bears somewhat of a resemblance to the Flying Eggman boss from Sonic the Hedgehog 2.
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