|Fast Facts on Meter Droid|
The Meter Droid is the ninth mini-boss fought in Sonic Mania, encountered at the end of Oil Ocean Zone Act 1. Its design loosely resembles the Hey Ho robot fought in Sonic & Knuckles' Mushroom Hill Zone, albeit styled as a plumber rather than a lumberjack.
The battle begins with the Meter Droid already hovering in the air, awaiting the player's arrival. The robot's hitbox will not be active until the mini-boss music begins playing. At all times, the boss's propeller is constantly spinning to keep it airborne, and is harmful to the player, so they must take care when hitting the robot.
The boss will begin its attack pattern by swooping downward to the other side of the arena, and then toss his wrench directly at the player's current co-ordinates like a boomerang. After that, he will go into the background to twist one of the valves and activate the six furnaces in the arena. The two furnaces in the center are safe; the other four will launch their lids into painful spike traps above the arena. During the time the boss is operating the valves, he will be out of reach.
After six hits, the boss will explode, and its destruction will ignite the oil and set the entire Zone ablaze for Act 2.