Originally Posted by davhuit
The 40s is more/less the same difficulty than Ryu's one, but the "Perfect K.O." is far harder, it took me a little more than one hour (Jump and throw a fireball, if Akuma is hit by the fireball, you can safely do your combo. He never used his focus when I started a combo with an air fireball).
It's funny how different everybody's experiences with this is. I had kind of a hard time with Ryu Perfect and 40 seconds. But with Akuma, I beat with a perfect like on the 2nd try. However, the 40 second one took HOURS.