Sleeper (missile)

The Sleeper is an object that appears in the Sonic Underground television series. It is a missile utilized by Dr. Robotnik.

Appearance
The Seekers are missiles colored red and yellow.

Features and abilities
The Sleeper is a missile that utilizes Tritarium as a fuel source. It's main function is to release a gas that can induce sleeping, which it uses to seek out and capture Freedom Fighters]].

History
The Sleepers were used by Dr. Robotnik in order to capture Freedom Fighters with ease, to the point that he was even able to capture and roboticize 28 in a week.