These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Ear worm: The Celtic-sounding theme used whenever an action scene takes place. Special mention goes to the episode, "The YuYu", where they use a rather epic theme during the chase scene.
Inferred Holocaust: Something happened when Bitey was just a child, leaving him the last of his species. He appears to vaguely remember this event. It is implied in the episode "Last of the Dashkin" that the YuYu had something to do with it.