Originally Posted by Fat RabidChipmunk
No, Psychic is superior. Psychic deals more damage to neutrally defensive targets and means that Pokemon like Gliscor can't stall you out of Trick Room.
No matter what you choose, there will always be something Reuniclus can't get past, but he's walled by more things by using Psyshock than by using Psychic.
absolutly seconding this other than blissey there is no reason to use Psyshock and Psychic is kinda superior against everything else since you will hit most special walls with you coverage attacks anyway.