Robotnik will sit in the middle on his Egg Mobile in an arena with only corner platforms and pipes which Sonic can walk on. The remaining area is enclosed with lava, and Robotnik's mobile is protected by fire and lava blasters, making it difficult for Sonic approach him normally. The best chance of defeating the doctor is to lure the homing fire projectiles he fires towards his machine's lava spewers, which will then destroy the spewers and make traversing the pipeline to Robotnik more safe. After landing eight hits on the Egg Mobile, Robotnik flees the scene with his smoking Egg Mobile, while his lava machine gets destroyed in the process.
- When Robotnik is defeated, the lava and the lava spewers no longer harm Sonic. Also, any streams of fire will be instantly extinguished.
- When Robotnik is hit twice, he will stop rocking (and straighten out) his Egg Mobile.
- It is possible to defeat Robotnik in the fastest manner possible by simply jumping over the lava spewers as high as possible.