Instructions
Avoid the crushers -- there are two in the ceiling and two on the floor. The crushers attempt to crush Sonic into the ceiling or floor, but only two activate at a time. For example, the bottom two crushers activate while the top two stay dormant. Eggman appears in one of these two crushers at all times.
Jump into Eggman to damage him. He is piloting the machine in the middle of one of the two crushers. You can only damage him once each time he appears. The crusher he appears in is always random.
Avoid the four pink sparks that appear once the two crushers have activated. These can be avoided by standing in the middle of the room and jumping straight up as they near you. Two more crushers activate once you avoid the sparks.
Continue to hit Eggman each time he appears in the crusher. The pattern is always two crushers followed by sparks. Eggman attempts to escape in his ship after hitting him eight times.
Hit Eggman's ship one time to destroy it, defeating him once and for all.