I hadn't thought about that but you're absolutely right. I never know what I have or haven't killed. I try to go off what level the enemies are. I also wish there was a way to see that it was an enemy you hadn't killed.
my current biggest complaint is the damn battle voices. I want to turn them off so hard and just listen to the music. I can't find an option to do that though, or turn them down, or something.
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xyzzy