Please subscribe to me to see my upcoming speed run of this game. Here it is. This is the final boss of the whole game. This is E.G.G. Station Zone. The Final Showdown. In this Act, you will be fighting against all the bosses again, but a little more challenging. After beating all four of them, you'll see the final boss. A very familiar looking machine from Sonic 2. The final boss is very difficult and takes up a whole lot of time to fight.