C2C4-47AA Infinite continues
DF8C-CDDA Start with 0 continues
D78C-CDDA Start with 2 continues
D58C-CDDA Start with 6 continues
DB8C-CDDA Start with 8 continues
C2B1-14F7 Player 1 is invincible
DDB5-1FF7 Player 2 or computer is killed by one hit
C2B5-14F7 Player 2 or computer is invincible
DDB1-1FF7 Player 1 is killed by one hit
622B-C7AC Disable throws--2-player mode
6DC7-1DAA Infinite time
06E1-17D4 Mileena's Sai Throw does massive damage
06E9-1DD7 Liu Kang's High Fireball does massive damage
06E2-1767 Kung Lao's Hat Throw does massive damage
06EF-4767 Cage's Shadow Kick does massive damage
06EB-17AF Reptile's Force Ball does massive damage
06E0-4FA4 Shang Tsung's Flaming Skull attack does massive damage
06E9-17A4 Kitana's Fan Throw does massive damage
06EE-C4A4 Baraka's Blade Spark does massive damage
06E4-34DF Rayden's Lightning Bolt does massive damage

For the rest of the codes, 1-player only, can't see the ending
CBC6-3D6E + DDC6-3DAE Always fight Kung Lao
CBC6-3D6E + DFC6-3DAE Always fight Liu Kang
CBC6-3D6E + D4C6-3DAE Always fight Cage
CBC6-3D6E + D7C6-3DAE Always fight Baraka
CBC6-3D6E + D0C6-3DAE Always fight Kitana
CBC6-3D6E + D9C6-3DAE Always fight Mileena
CBC6-3D6E + D1C6-3DAE Always fight Shang Tsung
CBC6-3D6E + D5C6-3DAE Always fight Rayden
CBC6-3D6E + D6C6-3DAE Always fight Sub-Zero
CBC6-3D6E + DBC6-3DAE Always fight Reptile
CBC6-3D6E + DCC6-3DAE Always fight Scorpion
CBC6-3D6E + D8C6-3DAE Always fight Jax
CBC6-3D6E + DAC6-3DAE Always fight Kintaro
CBC6-3D6E + D2C6-3DAE Always fight Shao Kahn
CBC6-3D6E + D3C6-3DAE Always fight Smoke
CBC6-3D6E + DEC6-3DAE Always fight Noob Saibot
CBC6-3D6E + FDC6-3DAE Always fight Jade