Dark Bio Ninjas rule the continent of Legend, a rocky, mountainous land cloaked in a perpetual veil of darkness caused by continual rain storms. Dark Bio Ninjas were once allies of the good Bio Ninjas and together they protected the planet from outside forces. Scarth, leader of the dark Bio Ninjas, became obsessed with power and eventually began a quest to take complete control of Zerin.
Scarth uses his massive carbon lithium hand blades as weapons to tear through his enemies. His second in command, Revelstoke, uses his rotor saw hands that can reach 20 feet to clear a path for the dark Bio Ninja army. Torable, a massive hulk of a robot, uses his size and weight to bull through approaching armies, breaking Bio Ninjas into broken heaps of metal in his wake.
Using Battle Belts gives Bio Ninjas special abilities in close quarters to repel opponents at speeds of 10,000 RPM.
