That is a good point, yes, I am using RM2K3 battlers. The good thing about the RM2k3 ones though, is that they based those off of old FF titles also. They have slimes (pugs), ahrimans, behemoths, basilisks, beserkers, and a few more. I also have rips from FFVI to bring back a few people like tonberry's, bombs and a few other people.
I actually have left the battlers in their original size, because they look almost exactly proportional to the actual character battlers.
This Side-view CBS is the easiest one to use. It uses the spritesheets as battlers. It runs really smoothly (no errors), requires no spriting, looks actually really good.
I want to make a few edits to make it look more like Rye's, but only in the windows.
BTW: I sound dumb, but what are the GBA remakes? Thanks.