Panic Puppet Zone

The final, gigantic, Eggman-shaped tower deeper in his base. The three acts are completely different than each other. The first act still has you rescuing Flickies, but they are trapped in containers instead of robots. There is no actual threat to Sonic's lives here, it's just very tricky to find them all. In the second act, all you need to do is survive! Sonic must actually climb the tower and survive on about 6 Rings. To protect his precious tower, Eggman deployed an army of robots to stop Sonic in his tracks.

Boss
The third act is the boss. This one is a toughie. It consists of three parts. The first part has the arms of the robot designed as spiked maces. Get near one to lure him to drop it, then hit the flashing thingon the left or right of Eggman himself. The second part uses flamethrowers. When Eggman blows fire, hit the flashing thing that appears. The last part has him using a cannon. The cannon can shoot multiple bullets that bounce around on the floor and spread out. I suggest staying in the corner of the one that shoots, then attack the flashing thing. Each flashing thing must be hit a total of three times each in every part. After you beat the fat man, you have just beaten the normal ending of the game.