What, exactly, do you mean by this? It's pretty simple to give an enemy access to the same skills as a player, if that's all that you have in mind. The same goes for things like stats, elemental vulnerabilities, and the like.
Armor, Weapons, Classes and Faces don't apply to enemies at all in any of the RPGmaker series. (Well, they could in RPGMaker III for the PS2, but that's not worth getting into right now.) (Also, you can use Faces in event dialog depending on the maker and/or scripts that you are using, but that's a minor detail.)
If you want to actually have enemies use weapons, armor, classes, whatever as a design tool, though, you're talking about totally altering the way that the system works, beyond just the usual level of scripting.
If you alter the battle system itself for the enemies to that degree, you're going to have to use scripting to enter the enemy data, as no amount of scripting will alter RPGmaker itself.
So, it comes down to this: What do you actually want this to do?