A Real American Hero comics continuity
Marvel Comics continuity
Slice and his partner Dice first came into contact with Cobra and G.I. Joe when a man calling himself the Red Ninja Master contacted them and called them and a number of Red Ninjas (renegade members of the Arashikage clan) to Cobra's Silent Castle in Trans-Carpathia. The Master displayed an in-depth knowledge of many of the Arashikage fighting techniques and convinced the other ninjas of his identity. Since Cobra Commander hadn't used the castle for years, Slice, Dice and the Red Ninjas easily ventured to the castle. Slice and Dice were surprised when Destro and the Baroness arrived at the castle after Destro was given the castle by Cobra Commander. When Slice, Dice and the other ninjas attacked Destro, they discovered the Joes had been watching, including Ninja Force. After a long battle, the ninjas escaped the castle into the wilderness with the Ninja Force close behind. After Snake-Eyes defeated Slice in a duel to settle their dispute, the Red Ninja Master arrived and revealed himself to be Firefly.
The mercenary had fooled the ninjas and after a brief fight, ambushed both groups of ninjas with his B.A.T.s and knocked them out with gas. He used Cobra's Brainwave Scanner to turn Slice and the others into his brainwashed slaves and headed to Cobra Island, long since unoccupied by Cobra. The Ninja Force eventually broke free, but Slice, Dice and the Red Ninjas remained under his control for a time.
Devil's Due Comics continuity
Live-action film continuity
G.I. Joe: Retaliation
Red Ninjas act as Storm Shadow's bodyguards and battle with Snake-Eyes and Jinx at the mountain stronghold.
|Ninja Force (1993)
Appearance: blue mask; red vest with blue straps; orange right armband; blue and purple wristbands; black pants with red boots and kneepads
Accessories: neon red "Dice" battle axe.
|Ninja Cobra Strike Team (2004)|
|Comic Pack (2005)|
|A Real American Hero 25th Anniversary (2007)|
|Snake-Eyes vs. Red Ninja Troopers (2008)|
- The Red Ninjas had been Cobra cannon-fodder for years before showing up in the toyline, though the first toy had a vastly different appearance than the red pajamas seen in the comics.
- The 1993 Red Ninja is noted to have one of the worst-written filecards in the entire line, making puns out of faux-Asian language ("the No Kan Doo ninja dynasty") and Asian food ("the famous Sushi battle that had sweet and sour moments for both sides").
- The Red Ninjas are a toned-down pastiche of the ninja sect, the Hand from Marvel Comics. The major differences being that the Hand is a nihilistic death cult and they are involved in the supernatural (worshiping a demon and using magic). Unlike the Red Ninjas, they also use technology (firearms, explosives, and cybernetics).