Ninjas are Evil Wise Man's grunt troops, and make up the bulk of his forces.
Ninjas are weak, slow, and generally not all that intimidating. However, what they lack in power they make up for in sheer numbers, as Evil Wise Man appears to have a large number of Ninjas in his employ.
King of Snow Island (Can take the form of a ninja and adopt ninja fighting techniques. Claimed to be the Ninja Warrior specifically, but a preponderance of evidence suggests this claim to be false.)