|Fast Facts on Metal Overlord|
At the beginning of Heroes' Last Story, Metal Sonic is revealed as the true antagonist of the game. Calling down a lightning bolt to detonate the command tower on which he stands, Metal initiates a transformation with parts from the Final Fortress battleship to adopt a huge, dragon-like appearance: Metal Overlord. The first part of the boss fight, Metal Madness, sees the player control (in turn) Team Rose, Team Chaotix, and Team Dark, harrying the not-quite-completely-transformed Metal Sonic amidst the wreckage of Final Fortress' command deck. In the second part, Metal Overlord, the blue steel dragon takes to the skies. Team Sonic then use super transformation, and pursue him in the sky.
During the battle, Metal Overlord rants about his intention to rule over a robotic kingdom, and how the organic Sonic is a copy of him - all the while plucking Robotnik's smaller warships out of the sky to hurl at the team. As the advice from the other characters confirms, the only attack that can damage the robotic dragon is the officially unnamed Team Blast (referred to by some fans as the "Heroes Trinity Strike"), allowing the entire team to Light Attack Metal Overlord. Five Team Blasts result in the machine's defeat.
Much like his Knuckles' Chaotix transformation, Metal Sonic Kai, Metal Sonic returns to normal after being defeated. The other characters leave the robot in the apparent custody of Shadow and E-123 Omega.
Metal Overlord has the following four attacks during his fight with Team Super, in no specific order:
Successfully recognizing and countering the above three attacks is essential to quickly raising your Team Blast gauge and taking down the boss.