I did some testing and the creatures that do not appear in the Hunt Analyzer are any creature in the Trivial category of the Bestiary. Also, it seems that creatures that give no experience and do not leave a body when they die do not appear either (eg. Fish don't appear in the hunt analyzer but slimes do). If anyone notices that any of the creatures do appear, or find a creature that is not in my list, please let me know! This is the list I came up with:
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