EGG X

The Egg X is a mech built by Dr. Eggman and is the last boss of the X Zone stage from Sonic Advance. As the final boss, it's much harder. The cockpit is covered by a red layer that's covered with deadly gadgets. At times, the red layer will stop moving and a random gadget will activate, during that time, Eggman will be vulnerable. Also, Eggman may charge at the player which is also a chance to hit the cockpit. After a few hits, the the Egg X will explode and the player will run away with the destruction of the X Zone right behind them. The player will then fall but will caught on the wing of the Tornado with Sonic piloting the plane. If the player is playing as Sonic, the pilot will be Tails. If the player has all the Chaos Emeralds, completes the game with all four characters, and plays through the X Zone as Sonic, Sonic will see Eggman escape to the Moon. He'll tranform into Super Sonic and give chase. Thus starting the Moon Zone.