I am 100% confident that at level 94 a roll back happened and from sand stream it turned unnerve. I had no h.a. Larvitars at all. I 've never caught a h.a. Larvitar. Maybe a bug along my black medalion? I really can't know.
This is, yes, quite unfortunate because i've spent my time and effort. I am not lucky at this game I guess. I still feel terrible for wasting my personal valuable time to experience such a bug issue.
I know that I cannot change IVs/Ability/Nature. That's why I am posting in this forum. Hoped for a solution.