how he ended up in this world, Scorpion confronted the demon Trigon, who summoned him out of anger that he had left his demon army and robbed him the glory of defeating the One-Earth High Councilor (Superman). Scorpion fights and defeats Trigon before taking command of his demonic forces, which he plans to use to rule the world. Character design and gameplay Scorpion appeared in the first Mortal Kombat as one of three palette-swapped ninja characters along with Sub-Zero and Reptile. His early origins were revealed by the series' original chief character designer John Tobias in September 2011 when he posted several pages of old pre-production character sketches and notes on Twitter. Scorpion and Sub-Zero were simply described as "[a] palette swap for 2 ninjas—a hunter and the hunted," while Tobias also considered the concepts of either one of them fleeing their clan, or a "revenge story" involving the then-unnamed characters being part of rival clans. In regards to the game's strict memory limitations, co-creator and programmer Ed Boon recalled: "A lot of attention went into the economics of it, and so we knew that if we could take a character and change their color and use basically the same memory to create two characters, we'd save a lot of money and we'd have two characters." Scorpion was given a yellow palette because the developers decided it symbolized fire in contrast to Sub-Zero's ice blue. Their similar appearance but opposite nature "prompted the story behind them being these opposing ninja-clan-type characters." A third ninja swap, Reptile, was added in the third revision as a hidden non-playable character who was outfitted in green and used Scorpion's spear (along with Sub-Zero's freeze) as part of his offensive arsenal; he was devised by Boon as "a cooler version of Scorpion." The original costume was created from a modified ninja-like outfit bought at a Chicago costume shop and was red for filming in the first game, but a different yellow one with a quilted vest and knee-high shin guards was utilized for Mortal Kombat II. This in turn made the other male ninja characters therein—Sub-Zero, Reptile, and hidden characters Smoke and Noob Saibot—palette swaps of Scorpion, with the latter two also using Scorpion's spear when players fought them separately in secret battles. Scorpion and the ninja characters were first played by Daniel Pesina, who was replaced by John Turk for Ultimate Mortal Kombat 3