I did end up implementing a "dodge/block" function that reduces the damage you take if you push B just before you get hit. I like it. It's a bit more difficult to time it properly than in Mario RPG because enemies attack faster, but I like it that way as I find it a bit too easy in Mario RPG. ChargingRhino, thanks but I'd like to keep this a solo project.
Okay, thanks for getting back with me, at least.
Good luck!