Sonic the Hedgehog 2/Death Egg Zone

The final zone in the game. There are two bosses in this zone: Robo Sonic and Dr. Robotnik's Giant Mech, known as the Death Egg Robot in Sonic Generations. There are no rings available in this zone.

Robo Sonic
When the zone starts, spin dash to your right into the first room, where you will fight Robo Sonic. He is pretty easy, if you don't take too long to defeat him. You must hit him 8 times to defeat him.

When he lands on the right side of the room, jump on his face four times (do not touch his spikes or you will lose a life because you have zero rings) and immediately go to the left side of the room as he curls up into a spiked ball. Dodge him as he spindashes towards you by jumping over him. When you see his face again jump on it four more times and Robo Sonic will be defeated.

Final Boss
After you defeat Robo Sonic, go right and chase after Dr Robotnik until he jumps into his Death Egg Robot. He will then rise out of the floor.The Death Egg Robot takes 12 hits intead of 8 to defeat, so have patience and follow and repeat this pattern until you've beaten him:


 * 1) He will take 4 steps forwards and 1 step back.
 * 2) He takes off. At this point, spin dash to the very rightmost part of the screen.
 * 3) He starts to aim. When he locks on (the target will start flashing yellow and a red square will appear over you as a "Target Locked" sign) move left just enough not to be hit.
 * 4) He will fall back down. When he bends forward, hit him on his CHEST. DON'T TOUCH HIS HANDS OR YOU WILL LOSE A LIFE AND BE FORCED TO RESTART THE LEVEL.
 * 5) Spin dash to left as far as possible. His arms will shoot off. then move to the right and wait.
 * 6) Repeat steps 2 to 4.
 * 7) Repeat from step 1.

If you have good timing, you can put hits on the metal suit as it is walking forward. But you have to time it so you hit him on the step, so you minimize your chances of hitting his spikes; and you have to be careful to move away right when you hit, otherwise you will go through it and die via the rocket pack on the other side. Perfecting that technique will greatly reduce the amount of time required to defeat Dr Robotnik in this stage.

Ending
Finally, after defeating the final boss, Sonic will run out of the exploding Death Egg and skydive back down, to be caught by Tails' plane (unless you have managed to collect all the Chaos Emeralds; in that case Super Sonic flies alongside the plane).