
Once transformed, the player will remain as Human Smoke throughout the tournament until either they lose in any match or win the final battle. Holding Back, High Punch, High Kick, Run and Block is the combination.

He can be both fought at the end of the game via Shao Kahn's Treasures and accessed in playable form via a code while playing as Robot Smoke before the round starts. He appears as a faster white palette-swapped version of Scorpion and Ermac having access to the former's Spear and a mix of their combos and a teleport punch. Following extensive automation, the human form of Smoke exists only in memory. Human Smoke: Smoke's original human form before the Lin Kuei took away his flesh.Ultimate Kombat Kodes require inputs from both players because of the combined slots. If any one of the kodes are input successfully, the arenas will quickly flash by in succession before displaying the character that was unlocked according to the code announcing, FROM THIS POINT ON, I AM AT YOUR CONTROL. However, in MK3 and its updates and ports, secret characters can be unlocked for player control via the Ultimate Kombat Kode (UKK). For the most part, secret characters are unplayable and merely exist to challenge the player. Mortal Kombat is exceptional, if not well-known, for being the first game to introduce secret characters in fighting games, and since then, has become a very recurring trend in the genre.

Secret characters often appear as color palette swaps (usually ninjas) of existing characters with enhanced speed and powers. To reach them, one must meet specific conditions, often challenging ones in order to face them in kombat. Secret characters are special opponents who are usually not found within the original 1P and 2P Tournament/Battle Plan.
