Ninja Sword
The Ninjato or Ninja sword is a weapon generally portayed as being used by ninjas in popular media despite having no real historical significance. It was straight, opposite to the curve of a regular Katana, and shorter to be easily brought during missions.
In the Mortal Kombat series it is used as weapon fighting style by four ninja characters: by Scorpion in Mortal Kombat: Deadly Alliance, by Noob Saibot in Mortal Kombat: Tournament Edition, because of him being a palette swap of Scorpion in that game, by Chameleon in Mortal Kombat: Armageddon and by Lady In Red in Mortal Kombat (2011 video game).