Killjoy 3 (also known as Killjoy's Revenge) is a 2010 comedy slasher film and sequel to Full Moon's hit urban horror movie, Killjoy. Released in 2010, this film is one of several made by Full Moon Entertainment in an attempt to resurrect old franchises. Other new films included Puppet Master: Axis of Evil and Demonic Toys 2.
Some time passes and Killjoy is once again called, this time through a blood pact. Immediately he resorts to using the blood spilled by his summoner to create three underlings, which he dubs new evil clowns, Punchy, Freakshow and Batty Boop. However the man does not name a victim for Killjoy, leaving the scene without doing so. This causes Killjoy and his posse to vanish and return to their world.
Meanwhile, a college student named Sandy is watching over her professor's house while he is gone from town, along with her friends Rojer, Erica and Zilla. While fetching the morning newspaper, Rojer finds a sack on the professor's doorstep. He carries it into the house, however Sandy protests against opening it. They decide to uncover the contents that night when Erica and Zilla return, and doing so, they find an ornate mirror which they hang on the professor's wall. That night Zilla inspects the mirror on his own, whereby he is transported to Killjoy's world. Killjoy stages a boxing match between Zilla and Punchy which nearly kills Zilla, however his friends discover his physical body and successfully resuscitate him, rescuing his consciousness from Killjoy's world. Furthermore, a barrier has been placed over the house, trapping the group indoors.
Erica is the next to fall victim to the mirror, and soon enough Killjoy makes his presence known by communicating with the three students through the mirror, beckoning them to join him in his world. He reveals his plan to dine on Erica, and invites the group to his feast. The professor (the man who summoned Killjoy earlier in the film) returns home and is quickly informed of the situation, however he is not surprised, having summoned Killjoy in the first place. Sandy, Rojer, Zilla and the professor enter Killjoy's world through the mirror, and each person faces a different demon. Zilla manages to convince Punchy not to be Killjoy's slave, the professor escapes Freakshow and Rojer is seduced by Batty Boop, while Sandy leads Killjoy on long enough for Boop to jealously confront him. Killjoy berates her for ironically coming onto another man, and then destroys her. The group then fails to save Erica at the dinner, before Killjoy's posse slices her apart on a silver platter. A battle ensues wherein Freakshow is vanquished with salt (which repels evil spirits) by Zilla, Rojer is killed during the encounter by having his head whacked off with a giant mallet by Killjoy and Zilla suggests Punchy take this opportunity to strike back against Killjoy, who slays him for his insolence.
Having allowed the deaths of Erica and Rojer as distractions, the professor finally enacts his plan to say the name Killjoy originally went by in antiquity, in an effort to subdue him. He also reveals himself to be the father of Michael, whose soul Killjoy exploited before destroying. The professor chose not to name a victim while initially summoning Killjoy because the target of his revenge was ultimately Killjoy himself. The clown applauds the professor for his deviousness in using both himself and the students alike to achieve his revenge. Killjoy proclaims that the souls he consumes become a part of him, and the spirit of Michael appears, consoling his father. With the professor's guard down, Killjoy slays him as well by smashing him with the giant mallet. The two survivors, Sandy and Zilla, resort to laughter to quell the clown, but Zilla is killed when Killjoy taunts them while actually trying to be humorous. Sandy continues to laugh at Killjoy while shouting his original name, which incapacitates him long enough for her to return to the mirror and be transported to her world. Killjoy then explodes in a fit of innards. The Magic mirror disappeared from the wall. Sandy is shown to be committed for insanity, having not stopped laughing since the ordeal, and under the suspicion of murdering her friends and the professor.