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.
This is the list of all finishers (fatalities, babality, and stage fatality) for Skarlet.
These can be unlocked and added to your moves list by performing them in either Arcade Mode or Versus Mode.
Check out these complete fatality guides for more finishing moves:
Fatalities and babalities for Mortal Kombat on Xbox 360
Fatalities and babalities for Mortal Kombat on PS3
Skarlet’s Fatalities & Finishing Moves
Xbox 360
Blood Bath – Down, Back, Down, Down, RT at close range
Make it Rain – Forward, Back, Down, Down, B in jumping distance
Babality – Down, Back, Down, Forward, Y in jumping distance
Stage Fatality – Forward, Back, Forward, X at close range
PS3
Blood Bath – Down, Back, Down, Down, R2 at close range
Make it Rain – Forward, Back, Down, Down, Circle in jumping distance
Babality – Down, Back, Down, Forward, Triangle in jumping distance
Stage Fatality – Forward, Back, Forward, Square at close range
