Ninja on a Motorcycle with a Baseball bat was one of the very first villains the early Revengerists (or Revengerlings, or Revengerist Kids!) ever encountered, and even though he was ultimately easily defeated, he is notable for leading to their current system (to this day!!) of categorizing and tagging their villain and incident files in a big database with the power sets and what have you.
An example of this was:
Name: Ninja on a Motorcycle with a Baseball bat
Description: Ninja on a Motorcycle with a Baseball bat
Powers: presumed any ninja powers or skills, speed associated with ninjas plus motorcycles
Weapons and Gear: ninja stars and smoke grenades, a baseball bat instead of a sword, rides a motorcycle
Incident: Viewed driving down the highway on the way to work, minding his own business
Location(s): by the big south freeway, near the Carl's Jr.
Result: tracked down by Revengerists, utterly destroyed by superior power set
(usually followed with a bar graph of the speed, strength, agility, power, and intelligence)
As noted, the eventual fate of Ninja on a Motorcycle with a Baseball bat was sad indeed. Not realizing their might, the overpowerd heroes left him a bloody smudge on reality, thus teaching the Revengerists a valuable lesson or whatever.