Because this wasn't listed in Justified's description, or on any highly-cited Pokémon resource (i.e. Veekun, Smogon, or Bulbapedia), I had to test to see if Justified activated if the Dark-type move hit a Substitute. (It doesn't.)
Also tested to see if Oblivious had received a secret boost like Mental Herb had, blocking Taunt\Disable\etc. Doesn't do that either.