Restrict espers by character.

I suppose I could do that. The tables are all that would need modifying, and as you can see above they're pretty self-explanatory.

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I mainly just used the routine that checks if someone has an esper equipped every time the esper list is loaded. This is my first in-depth ASM hack so I'm sure it could be made more efficient, but for now it's at least functional.

Yeah efficiency and optimization are for some people very important. I always think that there is a better way to do my ASM hacks or a better place to put the code. Keep in mind that except for C1 and C2, there is still unused space for tweaks like that in other banks (C0, C3, C4) that isn't being taken by other patches. I think your idea was pretty good.

It's important to me too, and the fact that what I wrote takes up 1034 bytes at the end of C3 leads me to believe it could be streamlined. Though to be fair, 864 of that are the character tables (27 espers * 16 character slots * 2 bytes per entry). There are a couple of places I believe it could be optimized, I'm just not sure how to go about it.