I was playing MK2 this morning and i stumbled on a trick to switch the costume colours around.
Start a two player match with both characters as shang stung. Two player should have a blue costume. Morph player 1 into sub-zero (F,D,F+HP) and do the freeze move (D,F+LP) on player 2. When player two melts he will be wearing the player 1 costume and when player 1 morphs back into shang tsung he will be wearing the player 2 blue costume.
This will change back at the start of the next round.
Start a two player match with both characters as shang stung. Two player should have a blue costume. Morph player 1 into sub-zero (F,D,F+HP) and do the freeze move (D,F+LP) on player 2. When player two melts he will be wearing the player 1 costume and when player 1 morphs back into shang tsung he will be wearing the player 2 blue costume.
This will change back at the start of the next round.