•Play as Goro Successfully complete the game. When "The End" message appears, quickly hold Up/Left + Back + A until the title screen appears. Press Start to start a new game as Goro.
•Play as Reptile Select any character, and defeat Shang Tsung. When he releases all the fighters' souls, hold LB + RB when Sub-Zero appears. Keep holding the buttons until the title screen appears. Start a new game. At the fighter selection screen, Reptile's face will be at the top middle of the fighter selection screen.
Read more: http://www.cheatcc.com/xbox360/mortalkombatarcadekollectioncheatscodes.html#ixzz1WkYHts6S Under Creative Commons License: Attribution Non-Commercial No Derivatives
Play as Noob . Hold A+B+X+LT, unplug the battery pack, swap batteries (one Energizer/ one Duracell) while still holding down A+B+X+LT, reconnect controller, start an XBL Party, Invite 3 friends, and tell them the code didn't do anything. At which point they call you a Noob.
If this was a port of the atrocious MK1 for GameBoy, playing as Goro would work.
If I remember right, there was a "color" glitch for Reptile. You had to fight him during an endurance round, the second person in the endurance would be green too. And if a second player hit Start during the Reptile match, Sub-Zero and Scorpion would also appear green. Once you select them they returned to their normal colors.