Tutorial: Editing Compressed Graphics

Like Madsiur said, they are non-compressed, so you can straight up view/edit them with yy-chr.
So with yy-chr go to around 1331B8 yes and you should see the spells & weapons gfx, make sure you are in 3BPP SNES graphics format. If they don't line up correctly at first keep clicking the + or - byte until they do.

At first I had no idea what you meant, but I had no idea you could do that with the "+/-"  I just thought I couldn't find it. Thank you so much for explaining that to me.  I'm not really a coder, so a lot of this is new and strange to me.