i just think that 1 on 1, a drunk stinky pirate would get owned by a skillful, silent, and stealthy ninja. in a free for all the one shot firearms would take out the front line of ninjas, but a barrage of ninja stars would cut down the first and second row of pirates, leaving the third injured. by then, pirates reload, and it's close quarters combat. several ninjas take some headshots and bodyshots at close range, but by now swords have been drawn and pirates start to get cut down to size.
then a monster blast occurs, as three cannonballs rip through the orgy of violence, cutting down pirates and ninjas indiscriminantly. the ninjas retaliate by using the wick lit gun powder bombs. but one holds onto it too long and the shrapnel tares him to shreds.
in the end, 22 ninjas emerge victorious..
.. ....yea, don't ask.