Okay so I've finally got some free time to hop on RPGMaker and try this all out!
I have redownloaded all of the battler packs again, and while I do see the "Battler Heros" (The one we are having this conversation in) pack has been updated, the others have not. I am referring to "Raven Fantasy 2D PixelArt Battler Set" 1-4, it's the one that has all sorts of monsters, which was included in the bundle pack along with the "Battler Heros" pack. It's the ones that also have the Time Fantasy variations in the file folders. All of those ones are too small as well, so while the Battler Heros set is updated and looks great, the other Battler Sets (That all are monster based) are still too small and haven't been updated from when I went to download them again.
I tried stretching them out in PS but they look terribly warped and blurry, which doesn't showcase how good and detailed your work is! :( If you could do the same updates to those battler sets 1-4 that you did with this battler hero set it would work perfectly!