"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."
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.