Psycho Power is the name of an energy that is used by M. Bison in the Street Fighter series.
Often termed as dark, negative or psychic, Psycho Power is most notably exploited by Bison himself, who utilizes the Psycho Drive to channel it, Psycho Power has been described as the corrupted negative energy of Soul Power, a power demonstrated by Rose, this may be true, considering Rose is the formation of Bison's positive energy. Through its use,Bison has gained a large amount of strength, including the ability to float, teleport,and control minds,as seen with the Dolls.He can also heal himself with the Psycho Drive.
However, this power can exceed the limits of his body,as seen during the events of the Alpha series,the type of body that he possesses also determine the true potential of his power level. While he does not need the Psycho Drive to use Psycho Power (due to the fact that it was destroyed in the Alpha series), he is considerably much more powerful with it. When fighting with Ryu in the Alpha series Bison states that the power deep within Ryu, is the ultimate form of Psycho Power, though it does not further explain the connection between the two (if any), it may explain his desire to capture Ryu and gain his body.