Enemies also do not have a MD% stat, a weakness that is useful to exploit."
I didn't notice an enemy check at that step. I'll have to double check that.
Enemies MDef% (magic evade) stat always = 0, I have not seen a single monster with this stat more than 0, but, I didn't check every monster. Enemies MDef% (magic evade) stat is found: current HP of the monster (in battle) + 33 bytes, in the PC version of FF7 (2012) v1.06. If this stat is increased manually, to 77 or 88, then the monsters evade magic, such as Matra Magic.
Also, the accuracy is affected by darkness status, Flash command and Deathblow command .
Physical Chance = (Actor's Dex / 4) + (weapon's hit rate / 2) for darkness status and Flash command
Physical Chance = (Actor's Dex / 4) + (weapon's hit rate / 3) for Deathblow command
Actor's evade = (Actor's Dex / 4) + Actor's Physical evade (armor evade (def%) bonus)
Target's evade = (Target's Dex / 4) + Target's Physical evade;
for monsters: Target's evade = Target's Physical evade; without (Target's Dex / 4)
HitChance = Physical Chance + Actor's evade - Target's evade