We all know quantum slimes right? A slime altered by some historical event, from a slime that may or may not exist in game yet. Well I have a theory on what the original slime may have been.
My best hypothesis for this is that they had originally been boom slimes, although I have little evidence for this out side of speculation on what may be a coincidence, and that detail is where the two spawn. Boom slimes do not appear naturally as boom slimes anywhere where a quantum slime spawns (although I don’t recall if the first half of the glass desert spawns pure booms.) but they are shown to have a appearance in those locations at some point in the past, having both a gordo and largos still appearing in those areas. I don’t have much more than this but i would like to hear your opinions.