Hey guys, I've been wondering why people use Psyshock instead of Psychic. I've tried to think what pokemon are checked better by psyshock, but the truth is that there aren't many. The pokemon for which psyshock could be useful are the ones with a significantly higher SpDef compared to Def, right? So let's see:
Chansey: takes max 35% from Psyshock, so it's kind of pointless.
Tyranitar: immune to psychic moves anyway
Conkeldurr (AV): Hyper Voice already does the job
Excadrill (AV): resists psychic moves, you should use Focus Blast instead
Heatran: resists psychic moves, you should use Focus Blast instead
Zapdos: runs physically defensive sets more often than special sets
Rotom-W: runs physically defensive sets more often than special sets
Venusaur: runs physically defensive sets more often than special sets
Goodra: Hyper Voice deals the same damage as Psyshock
Psychic is still the superior option when dealing with Zard Y, Volcarona and Sylveon, which is admitelly great. Psychic, on the other hand? It deals more damage (statistically) to the aforementioned Venusaur, while being also better against Gliscor, and Iron Defense Scolipede.
Looking at it, it seems hard to decide which move is the better one, it all boils down to your team. So why is Psyshock so universally prefered to Psychic?