So I recently picked up a Powersaves device and being extremely curious, decided to play around with putting enemy-only skills on the characters in my (completed) Birthright file (which will never be used for online play). I found a few interesting subtleties and interactions, but the biggest surprise was how well the game handles (from a "correct behavior" standpoint) player units having skills they shouldn't. All of them that I tested (listed below) work as advertised with only the most minor of exceptions, and none of them caused any glitches I could detect.
Here's all I found out. Some of this information might already be known, but a lot of it I couldn't find anywhere. These facts could be useful if you want to know what to look out for when facing enemies with these skills, or you want to do a for-fun run of the game using some enemy skills, or you want to maybe incorporate them in class skill trees in a ROM hack, or you are just curious about the intricacies of the game's mechanics.
General notes about Powersaves and skills:
Here's some trivia about the various skills I tested:
Inevitable End
Staff Savant
Immobilize
Hit/Avo +10, +20
Resist Status/Immune Status
Dragonskin/Divine Shield
Final Question:
Do you think any of these skills could have been made available to player units without destroying the game's balance? Some are obviously way overpowered, but others I'm not so sure about....