Robotnik's Robo-Rampage is the first boss battle of Neo-Flame Act 2. This battle takes place in a cramped, industrial area filled with pipes and conveyor belts. You'll need to navigate through the maze of machinery to reach the final showdown with the mad scientist himself, Dr. Robotnik.
Read about Robotnik's Robo-Rampage
Dr. Eggman's Egg-Vac is the second boss battle of Neo-Flame Act 2. This battle takes place in the heart of Dr. Eggman's Egg-Mobile, where he's attempting to hatch an enormous, city-sized egg that will give him the power to take over the world.
Read about Dr. Eggman's Egg-Vac
Metacod's Metal-Maelstrom is the third boss battle of Neo-Flame Act 2. This battle takes place in an abandoned mine filled with treacherous, shifting metal plates and laser traps.