Free up space for monster sprites?

Sure. There are a few minor things to iron out since I only did proof of concept testing, but I've got some time today so I will try to put something together.

And in order to be on-topic: the process I use to expand the number of characters with large sprite sheets is very similar to what you would end up doing to expand the monster sprites, if you were to do it from scratch. So it might be worth a look when I'm done yic.

I'm thinking this might involve making a video...