Unlock Mokap:
Complete all missions in Konquest mode for all fighters. Then highlight Cyrax at the character selection screen and hold Down and hit Start. 

Unlock Blaze:
Complete all missions in Konquest mode for all fighters. Then highlight Raiden at the character selection screen and hold Down and hit Start. 

Fatalities:
NOTE: 1,2,3,4 represent the attack buttons 
Bo Rai Cho: Belly Flop = Back, Back, Back, Down, 4
Johnny Cage: Brain Ripper = Back, Forward, Forward, Down, 2
Kano: Open Heart Surgery = Forward, Up, Up, Down, 1
Kenshi: Telekinetic Crush = Forward, Back, Forward, Down, 3
Kung Lao: Splitting Headache = Down, Up, Back, 3
Li Mei: Super Crush Kick = Forward, Forward, Down, Forward, 4
Mavado: Kick Thrust = Back, Back, Up, Up, 1
Quan Chi: Neck Stretcher = Back, Back, Forward, Back, 3
Scorpion: Spear Head = Back, Back, Down, Back , 4
Shang Tsung: Soul Steal = Up, Down, Up, Down, 2
Sonya: Kiss of Death = Back, Forward, Forward, Down, 2
Sub-Zero: Skeleton Rip = Back, Forward, Forward, Down, 3
CyraX: Claw Smasher = Forward, Forward, Up, 2
Drahmin: Iron Bash = Back, Forward, Forward, Down, 3
Frost: Freeze Shatter = Forward, Back, Up, Down, 1
Hsu Hao: Laser Slicer = Forward, Back, Down, Down, 2
JaX: Head Stomp = Down, Forward, Forward, Down, 2
Kitana: Kiss of Doom = Down, Up, Forward, Forward, 2
Nitara: Blood Thirst = Up, Up, Forward, 1
Raiden: Electrocution = Back, Forward, Forward, Forward, 3
Reptile: Acid Shower = Up, Up, Up, Forward, 3 

Unlocking Characters:
Character (Price to Unlock) - Which Koffin: 

Cyrax (3003 Platinum Koins) - CN 
Drahmin (6500 Sapphire Koins) - UR 
Frost (208 Ruby Koins) - IV 
Hsu Hao (3317 Jade Koins) - MW 
Jax (3780 Ruby Koins) - SA 
Kitana (2931 Sapphire) - KI 
Nitara (4022 Gold Koins) - TI 
Raiden (3116 Jade Koins) - XG 
Reptile (3822 Gold Koins) - LL 

Unlocking Alternate Outfits: 
Character's Outfit (Price to Unlock) - Which Koffin: 

Bo' Rai Cho (1200 Onyx Koins) - PH 
Cyrax (1485 Sapphire Koins) - ZW 
Drahmin (1152 Jade Koins) - SW 
Frost (1261 Gold Koins) - UB 
Hsu Hao (1518 Jade Koins) - QX 
Jax Briggs (1410 Ruby Koins) - ZM 
Johnny Cage (1460 Ruby Koins) - DK 
Kano (1520 Sapphire Koins) - BD 
Kenshi (1435 Platinum Koins) - YM 
Kitana (1327 Gold Koins) - BQ 
Kung Lao (1208 Ruby Koins) - YJ 
Li Mei (1406 Sapphire Koins) - KX 
Mavado (1455 Jade Koins) - RD 
Nitara (2206 Jade Koins) - AR 
Quan Chi (1556 Gold Koins) - AA 
Raiden (1685 Ruby Koins) - JR 
Reptile (1736 Sapphire Koins) - XO
Scorpion (1660 Jade Koins) - UH 
Shang Tsung (1170 Gold Koins) - ML 
Sonya Blade (1834 Ruby Koins) - SH 
Sub-Zero (1999 Sapphire Koins) - YA