Cale Darksun
Ral Roke
Yes but the ninja trains by killing every beast known to man. Plus it's so hard to kill a ninja. I mean you have to kidnap Chris Rock, place the microwave just right, etc.
Pirates have ships with cannons.
And they still exist.
Unlike Ninjas who have just become pop culture icons.
Ninjas exsist, you just dont see them because they're ninjas.