Mortal Kombat 3

Random character:
Hold Up and press Start at the character selection screen.

Five credits:
Press Up at the "Choose Your Destiny" screen.

One credit:
Press Down(2) at the "Choose Your Destiny" screen.

Kombat Kodes:

Character	Number
Dragon	0
MK Logo	1
Ying-Yang	2
Three	3
Question Mark	4
Lightning Bolt	5
Goro	6
Raiden	7
Shao Kahn	8
Skull	9

Effect	Kombat Kode
Fight as Smoke	192-234
No throws	100-100
No power bars	987-123
No blocks	020-020
Switch	460-460
Run always	466-466
Player one at half power	033-000
Player two half power	000-033
Player one at quarter power	707-000
Player two at quarter power	000-707
Fight against Smoke	205-205
Dark mode	688-422
Psycho mode	985-125
Flipper message	987-666
Power message	123-926
No fear message	282-282