Psycho Cyan bug

The "Psycho Cyan" bug is a bug in the game Final Fantasy VI. It is actually the combination of two bugs involving Retort. The first bug allows Cyan to counter any physical attack dealt by any target to any target if he is KO'd and revived while in Retort status. The second bug occurs when Cyan is Imped while in Retort mode. He counterattacks with a simple physical attack instead of Retort itself while Imped, and as such, Retort never comes off. When these two bugs are combined, Cyan enters an infinite loop of attacking his opponents. Because he is Imped, Retort never comes off, and because he was revived after being KO'd, he counterattacks his own attacks. The loop ends when all enemies on the screen are dead.

This bug was fixed in "Final Fantasy VI Advance." Although Cyan will still not lose Retort status as an Imp, he does lose the staus when KOed.