both for gamecube and ps2 here are the mkda fatalities code:

GAMECUBE:

DRAHMIN:back,forward,forward,down,A

FROST:forward,back,up,down,B
HSU HAO:forward,back,down,down,Y
JAX:down,forward,forward,down,Y
JOHNNY CAGE:back,forward,forward,down,y
KANO:forward,up,up,down,B
KENSHI :forward,back,forward,down,A
KITANA:down,up,forward,forward,Y
KUNG LAO:down,up,back,A
LI MEI:forward,forward,down,forward,X
MAVADO:back,back,up,up,B
NITARA:up,up,forward,B
QUAN CHI:back,back,forward,back,A
RAIDEN :back,forward,forward,forward,A
REPTILE:up,up,up,forward,A
SCORPION:back,back,down,back,X
SHANG TSUNG:up,down,up,down,Y
SONYA:back,forward,forward,down,Y
SUB ZERO:back,forward,forward,down,A
CYRAX:forward,forward,up,Y
BO RAI CHO:back,back,back,down,Y

PS2

DRAHMIN:back,forward,forward,down,X

FROST:forward,back,up,down,square
HSU HAO:forward,back,down,down,triangle
JAX:down,forward,forward,down,triangle
JOHNNY CAGE:back,forward,forward,down,triangle
KANO:forward,up,up,down,square
KENSHI :forward,back,forward,down,X
KITANA:down,up,forward,forward,triangle
KUNG LAO:down,up,back,X
LI MEI:forward,forward,down,forward,circle
MAVADO:back,back,up,up,square
NITARA:up,up,forward,square
QUAN CHI:back,back,forward,back,X
RAIDEN :back,forward,forward,forward,X
REPTILE:up,up,up,forward,X
SCORPION:back,back,down,back,circle
SHANG TSUNG:up,down,up,down,triangle
SONYA:back,forward,forward,down,triangle
SUB ZERO:back,forward,forward,down,X
CYRAX:forward,forward,up,triangle
BO RAI CHO:back,back,back,down,triangle