I was wondering if there was some sort of spell table or spell check that causes monster spells to fail...
The reason for this is that I found Mini status to prevent a monster, the Waterbug, to successfully use Remedy.
Strangely enough, the Retreat spell works.
In FF4A, this both Remedy and Retreat don't work for the Waterbug.

There seems to be some consistancy in the GBA port than in the SNES port.
In the GBA port, Mini status seems to disable all monster spells.
In the SNES port, Mini status seems to disable one monster spell (AFAIK at the moment)... the other spells work normally (Slap, Retreat).
I'm currently doing some testing here to understand this further, unless there's some information that can be provided about it.