[yamayamayaamaa]

Originally Posted by FeudalEra

Momentary Pleasure (15):
Successfully perform an impact 100 times.

Performing an impact is simply put as a “Guard Impact”. To do a guard impact hold back in the directing you aren’t facing and press a+b+k just a little before your opponent lands an attack, if done correctly you will deflect their attack and this green burst will show. Do this 100 times and you’ll earn the achievement. This can be earned in all modes except vs and practice. You can however boost with friends.
Tip: Some characters such as Xiba, Maxi, Siegfried/Nightmare (during their critical edge) have auto GI's that don't require critical gauge.
Here's how to do them with the following:
Xiba: Well timed critical edge.
Maxi: +
Siegfried/Nightmare: Well timed critical edge.

"For Momentary Pleasure, the achievement can also be earned by using characters' moves that Auto Guard Impact (GI). Example would be Xiba's Critical Edge, Siegfried's ducking stance, and Alpha Patroklos' A+B. Not every character has them but they do not cost meter to use. Much faster."
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+ = Taunt

What CyberEvil meant was the in game controls of A+B, which are X + Y on the Xbox controller.

Which does not do an auto GI for Maxi, not sure where you got that from.

Also, Sigfried's ducking stance is called "Base Hold" and is Y+B on the Xbox controller.