Reptile is notable to be the very first hidden character in video game history. He doesn’t have any storyline or ending, but later game mention that he was Shang Tsung’s personal bodyguard in MK1 and MK2. Most port implemented him, including the Super NES port. However, he is unplayable.
In the Super NES port, there is no shadow passing by the moon and is not required to fight Reptile. However, the player must perform a double flawless victory, avoid using the block button (except when required by fatality) and perform a fatality at the end of the match. Doing so will bring the player to the bottom of the pit against him. The Super NES and Amiga port are the only version which Reptile has his name in the life bar (other versions, including the arcade original, has Scorpion’s instead).
Mortal Kombat Champion Edition Hack allows a human player to play as Reptile. Previously, it was possible through Game Genie and Action Replay code, but it was impossible to get both Scorpion and Sub-Zero move set at the same time.
Reptile is not a character technically, but in the Super NES port, a character ID is reserved for him. Unlike other characters, it only contains his name in the life bar and the palette. Then, during a fight against him, he will switch between Scorpion and Sub-Zero character and move-set ID. In the hack, the ability to switch between the two fighters is resolved by pressing the Select button.
Reptile has the same basic move as the two other ninja, but has access to both move set, allowing him to do the Spear, the Teleport Punch, Freeze and the Slide move. He is also able to perform the ninja fatality. Since the CPU never does fatality in the Super NES port, it is unseen without actually playing as him.
Reptile will use either Scorpion or Sub-Zero’s strategy against the CPU. Since there is no limit to the number of projectiles he can shoot, he has a long infinite which consist of using the Spear, freeze his opponent and repeat the sequence over and over. He can also do three hit combos which consist of the Spear, an uppercut and a Slide. While Reptile walked very fast in the Arcade, he has the same walking speed as the other character in the Super NES port (including when the CPU control him).
His mirror match is a fight against Scorpion.
The hack author made a special catch in the code to not display Scorpion’s or Sub-Zero ending when completing the game with Reptile. It will instead return to the title screen right before the character ending is shown.
As a side note, Reptile doesn’t have a second palette, the second player will either be yellow like Scorpion, or have the same outfit colour as himself. The CPU will also never perform the Teleport Punch special move.
As a second note, trying to directly access his character ID (with cheating devices) will freeze the game right at the beginning of the match, but his name will be displayed in the life bar. As mentioned earlier, it is because he doesn’t have any data beside the name and the palette.
TAS tools were used to make this high quality playthrough video.