Evil Ninjas are the most common enemy type in the game. They come in five different variations:
Brown - Can do all player actions (climb, duck, hide behind boxes). Shoots Uzi or throws shurikens. Will commit suicide.
Red - Will do everything his brown cousin does, plus he can shoot small rockets at you, as well as shoot Uzis. This variant doesn't use shurikens.
Shadow - The most fearsome of the lot, this ninja uses the ancient skills to stay nearly invisible. He can blast you with two type of magic napalm, one being a wall of fire. Beware, because this ninja is also skilled in use of the flash bomb. Once blinded, you will have little chance of survival.
Orange - These ninjas have added ability to shoot heat seeking rockets at you. Very nasty in open areas. After death, they sometimes drop a heat seeking card.
Gray - These ninjas have been upgraded with the ability to launch grenades at you. Considering the blast radius of grenades, these guys are particularly nasty. After death, they can drop grenades.
Mercenaries - Appear in expansion Wanton Destruction. Act exactly like Evil Ninjas counterparts, except have different visual design. The color of their hats reveal what kind of variation mercenary is.
Evil Ninjas have muscular body. They only wear pants which differ in color depending on ninja type. Their hair are tied in a ponytail. They eyes glow bright red and mouth is full of pointy teeth. Shadow variant is exactly the same except is entirely in black. Mercenary variation has entirely different design, wearing black tuxedo, with sunglasses and a brown hat. Another unique design part is their mustaches.
Brown Ninjas are easiest to deal with as simple katana will kill them in few slashes. Orange and Red ones are much more dangerous because of their ability to shoot rockets. When fighting them is best to take distance as to anticipate and notice when Orange and Red shoot their rockets at you. The same goes for Gray Ninjas. Shadow Ninjas are most dangerous of the bunch. They can be easily blend in with area and be missed by the player. Their attacks are also devastating, easily killing Lo Wang in one of two fire attacks. Is best to use explosives weapons as to kill them right from the start you see them.
- Tough named "Ninjas' in the game, aestecally they look nothing like ninjas.