I didn't think of it too much previously, but I guess it's worth considering. If you fear certain monsters afflicting a status effect on you, and you don't have a Ribbon handy, this is a good substitute. Given how status priorities work, you have the opportunity of getting the closest thing to a Ribbon in having Piggy status. You lose a number of commands, particularly the spell commands, but you get free protection against the following:
Mute
Darkness/Blind
Curse
Paralysis
Sleep
Charm
Berserk (yes, that means control over the Pinkpuffs/Flan Princesses battle)
Unfortunately Poison/Venom and Gradual Petrification is not part of it... but otherwise that's pretty damn good. However, this won't protect you against Bad Breath.
Your offense/defense is not affected, so you can still become relatively useful... if you are a fighter.
This method is ideal for a fighter.. even better with the guy wielding the Avenger. Piggy status is also handy on the enemy via a Change Rod, but I forgot the "benefits" of the Piggy spell as it is underrated... it's really useless for any other purpose than what I've suggested.
We have EVEN MORE themes now, but some old ones are gone...