I was in a OU battle and a Medicham used Psychic on my Tyranitar and OHKOed me, but Psychic types can't hit Dark types? Just like Normal against Ghost.
Am I missing something?
I could come up with two explanations or this:
Option 2 is a likely choice, although rare (not nearly as rare as Psychic Medicham though).
Hope I helped!
Allows psychic types moves to hit dark types