Seriously?but mortal combat doesn't say they're not regular humans, and it doesn't say they learn special supernatural variants of those mundane fighting styles, you're making those answers up yourself, it's exactly the same situation as with DnD, why can't you just quietly make up your own excuses to yourself in your own game rather than telling us over and over 'it has to be this way' (fun fact: it doesn't)
Sub Zero/Frost- Ice powers, can make himself a clone made of ice to avoid death. Can also create protective ice barriers.
Scorpion- Teleportation, easy access to the Neatherrealm. Immortality, fire powers, can summon demons.
Shinnok- God of death. Can summon weapons made of bones, and strange mystical balls of fire.
Raiden- god of lighting. Teleportation, lighting strikes, flight, very fast, can produce chain lighting and attack his opponents from multiple angles.
Fujin- wind god. Can summon small tornadoes, also has very strong wind blasts that can blast back opponents.
Tremor- rock and other powers related to certain materials. I’m not entirely sure, but I think he can absorb certain materials and then gain their characteristics, like he can go from throwing normal rocks to throwing magma, diamond etc.
Reptile- invisibility, acid spitting/puking, can throw balls of acid.
Triborg- invisibility, teleportation, fire powers, smoke powers, ice powers, can create weapons out of their body, etc.
Rain- water powers, giant water bubbles, teleportation etc.
Jade/Mileena/Kitana- evasion, teleportation.
Kenshi- telekinesis, has a spirit he can use to attack.
Goro- can shoot fire out of his hands and his mouth.
Liu Kang- can shoot fire out of his hands, extremely fast.
Ermac- telekinesis, flight.
Sindel- sound/Sonic related powers, also has magical hair (she can toss her enemies around with it, trip them etc.)
Shao Kahn-superhuman durability, stamina strength, dark magic. Powerful charge attacks, wrathhammer, soul spear, energy absorbiton etc.
Blaze-most of his powers are pretty straightforward, flame ball, flame charge, flame uppercut, quake slam, melting lava teleport.
Khameleon-a lot of her moves are borrowed from Mileena and Kitana, but here are her signature moves: yellow surge, square wave, venom from above, serpents shadow.
Kabal-raging Flash, charge, gas blast, sawblades, nomads touch, tornado slam.
Night wolf-tomahawk swing, reflector, spirit arrow, red spirit arrow, shoulder charge, lighting from above.
Smoke-teleport punch, spear, smokeycut, air throw, invisibility, teleportation, toxic smoke clouds, smoke cloud.
Jason Vorhees-teleportation,regeneration, super strength, strength amplifiers, durability amplifiers, resurrection, fast shoulder charges.
D’Vorah-Control Over Insects, Giant Stingers, Venom, Flight, Venom traps, bug swarms.
Baraka-can shoot some type of charged energy out of his arms, retractable blades, fighting skills.
Noob Saibot-
Shadow-based powers, Fighting skills, Ninja stars, Scythe, Murderer skills, Troll hammer, Noob Shotgun, also has most of not all of Subzeros abilities.
Shang Tsung-Sorcery, Soul absorption, Skilled martial artist, Shapeshifting, pyromancy, Teleportation, Swordsmanship, Cunning, Great fighter with his Jian Straight Sword
Quan Chi-Sorcery, Necromancy, Illusions, Fighting skills, Manipulation, Tang Soo Do fighting style, Skilled fighter with his Dao Broadswords, can open portals/rifts.
Kotal Kahn-
Superhuman strength, Accelerated healing, Power from sunlight, Blood magic, Cunning, Swordsmanship, can summon empowering tombs and flaming discs.