Reactive Factory

Reactive Factory is an important Dr. Robotnik base, where he constructed and created Metal Knuckles and Tails Doll. This factory is completly automatic, and uses water as fuel to work. On an hidden room, inside this factory, Robotnik altered his Eggmobile, so he could take advantage on the World Grandprix on which his base served as a course. Reactive Factory was seen only on the videogame Sonic R, where Metal Knuckles was the unlockable character.