The final boss of Green Hill Zone will be none other than one of Eggman's many Death Egg Robots, piloted by Eggman himself. As Super Sonic, he can fly through stages super-easily. The final boss of Sonic 1 returns! I haven't finished Sonic Mania yet but just barely squeaked past some of the mid and late game bosses. Sonic mania final boss guide General Discussions > Topic Details.
