President Koopa

President Koopa is the main antagonist of the 1993 live-action sci-fi fantasy, adventure, comedy movie Super Mario Bros the Movie which is loosely based on the popular Super Mario Bros. videogame. He is the film's version of Bowser.

He was portrayed by the late legendary actor Dennis Hopper.

History
Mario and Luigi find themselves in a strange dystopian parallel world where a human-like race evolved from dinosaurs rather than the mammalian ancestry of true humans in a Manhattan-like city. 65 million years ago, a meteorite crashed into the Earth and in doing so ripped the universe into 2 parallel dimensions. All the surviving dinosaurs of the time crossed over into this new realm. Iggy and Spike turn out to be henchmen (and cousins) of the other world's germophobic and obsessive dictator, King Koopa, descended from the T-Rex. However, the two have failed to also bring a mystical rock possessed by Princess Daisy (Princess Peach Toadstool in the live-action version]], a meteorite fragment which Koopa is trying to get in order to merge his world with the human world that separated from Koopa's world during the meteor strike. It turns out that Daisy is the Princess of the other dimension but when Koopa overthrew Daisy's father (and turned him into fungus), Daisy's mother took her to New York using the inter-dimensional portal. The portal was then destroyed, killing Daisy's mother in the process; but when Scapelli was blasting at the cave, the portal was reopened. When Koopa hears about the re-opening of the portal, he sends Spike and Iggy to find Daisy and the rock to merge the dimensions and make Koopa dictator of both worlds. Spike and Iggy, however, who had grown more intelligent after being subjected to one of Koopa's experiments, decide to turn on Koopa and join forces with Mario and Luigi. Koopa thinks only Daisy can merge the worlds, but Mario and Luigi were just in the wrong place at the wrong time. Daisy is eventually rescued by the plumbers, along with the help of Toad, a man punished by Koopa for performing music protesting his reign, then condemned to be "devolved" into a Goomba. Eventually, the two worlds merge and Koopa inadvertently devolves Scapelli into a primate while aiming for Mario, but Luigi and Daisy take back the rock and the worlds separate again. Mario confronts Koopa and eventually wins when he and Luigi devolve him, transforming him into a ferocious, semi-humanoid Tyrannosaurus. Koopa then leaps out for a final attack but Mario and Luigi destroy him by devolving him further into primeval slime. Daisy's father, the king named Bowser, turns back to normal and reclaims control over the kingdom stating he loves those plumbers. The citizens destroy anything involving Koopa.

Appearance
Koopa is a middle-aged man with blonde hair shaped into a crown who dresses in a black buisiness uniform. After he was devolved by the Mario brothers he gained eyes with slit pupils, a reptilian tongue and his face morphing into being more reptilian. near the end of the film he's devolved into a semi-humanoid tyrannosaurus.