Bridge Zone boss

The Bridge Zone boss is a vehicle that appears in the Master System and Game Gear version of Sonic the Hedgehog. It was a submarine-based Egg Mobile created by Dr. Robotnik that the doctor used to battle Sonic the Hedgehog.

Battle
The Bridge Zone boss is the second boss of Sonic the Hedgehog. The player fights it at the end of Bridge Zone Act 3.

Boss guide
Like in many other third Acts in the game, there are not any Rings when the player faces Dr. Robotnik in his submarine mobile, which has two small turrets on the top. In the Master System version, Robotnik will pop out of the river between the islands to fire projectiles, and then hide in the river again. The player has to either duck and wait for a good moment to Spin Jump on the submarine mobile to damage it before it fires projectiles. The player has to land eight hits to defeat the boss and complete the Zone.

The level layout of Bridge Zone Act 3 is very different in the Game Gear version of the game. Aside of crossing long crumbling bridge, the boss arena includes two sloping bridges due the screen resolution of the Game Gear. As Robotnik appears in his submarine mobile, the player can easily do the Spin Jump without worrying of falling off. In fact, there is an effective strategy: simply roll into Robotnik to deal about three hits of damage at once.

Once Robotnik has taken eight hits, he will be defeated and flee in his exploding Egg Mobile, allowing the player to open the metal cage and complete the Zone in doing so.