Psychic causes damage and has about a 33% chance of lowering the
enemy's Special.
Note that since the victim's Special statistic is being altered, both
the victim's resistance to Special attacks, including subsequent uses of
Psychic, and the effectiveness of the victim's own Special attacks will be
decreased.
Resistance to and damage caused by Physical attacks like Earthquake and Swift will not be affected.
For more information on the different kinds of attacks and how damage
is determined for each of them, see the Attack Base Explanation.
Psychic has the highest Average Damage of all Psychic attacks,
except for Dream Eater, which has
strings attached.