Ok let's be very clear first, if you have 0 sills in fighting games (like me) you will not like Fatal Fury.
But the game itself is not that hard if you handle to manage one single technique !
Launch Hi-score Mode, and pick Andy Bogart (right guy with blond hairs, white clothes).
And fight against Tung Fu Rue first, as he is strongest fighter in the game, and it will be much more easy to deal with him while he is easy to beat.
Now, the only thing you have to practice and mastered is this technique:
,
and
(personnaly I found it more simple with the joystick instead of the D-pad)
If you do it well, Andy will make a quick move forward and hit the opponent.
I was not getting it for the first half an hour, as I was always trying to make the combo fastly.
It is not needed ! The trick to master is :
1. Make few steps away with Andy with:
2. While making the steps away, quickly:
+
3. As soon as you hit your opponent, get away from him and repeat 1. and 2.
My advice against Duck King, which was for me the strongest opponent, is to make the combo and as soon as he gets up you have to touch him again.
If you manage to beat the first 6 fighters (+ at least one Bonus stage) you should have at the end more than 150.000 points.
Practice and you will get it