KoFXIII: Corner Cross Up Off Ground Normals
TSS AtmaDP recently uploaded a very interesting tech video which shows how you can cross up a crouching opponent who is placed fully in the corner:
First; the opponent must be brought to the corner offensively, not just pushed in through running or walking into the character sprite.
Second; the last hit must not be a neutral jump attack or special move as shown in the video. The jump attack must be able to go over a crouched opponent.
Third; if the opponent stands up blocking before the cross-up, the cross-up loses its ability.
Test it out yourself in practice mode!