Each character has multiple fatalities that they can perform at the end of the match in Mortal Kombat 9 (2011 version) for the PS3 and Xbox 360.
All of these moves can be unlocked and added to your moves list by performing them in either Arcade Mode or Versus Mode.
Looking for more finishing moves? Check out my complete fatality guides:
Fatalities and babalities for Mortal Kombat on Xbox 360
Fatalities and babalities for Mortal Kombat on PS3
Rain’s Fatalities & Finishing Moves
Xbox 360
Bubble Burst – Back, Forward, Down, Back, RT in jumping distance
Does it Sting – Up, Down, Back, Forward, Y in jumping distance
Babality – Back, Down, Forward, X in full screen distance
Stage Fatality – Forward, Down, Forward, B touching the opponent
PS3
Bubble Burst – Back, Forward, Down, Back, R2 in jumping distance
Does it Sting – Up, Down, Back, Forward, Triange in jumping distance
Babality – Back, Down, Forward, Square in full screen distance
Stage Fatality – Forward, Down, Forward, Circle touching the opponent