9
Boss Stage
Sonic will face Dr. Robotnik in the third ACT of every Zone. As usual, he will be equipped with one of his many contraptions. It will require several attacks (he flashes when he takes damage) to defeat Robotnik, so quickly learn his offensive moves, and strike back with the Spin Attack when he is vulnerable. Note that you will start the battle without any Rings, so your priority is to pick up at least one Ring to stay alive. When you beat him in each ACT, you will advance to the next Zone. If you defeat him in the final Zone with all the Chaos Emeralds in your possession, you will be able to play the Final Fight Zone.