Super Mario Bros. features the emergence of an alternate dimension caused by (what is now known as) Brooklyn being struck by a meteorite millions of years ago. In this alternate dimension, humans evolved from lizards, rather than monkeys, as believed in our own realm. There is also only one city, Dinohattan, surrounded by endless desert, and currently presided over by the evil Koopa (Hopper, Red Rock West). President Koopa (Dennis Hopper) is out to get a powerful rock crystal, a fragment of the original meteorite, that he needs to merge the two dimensions, giving him more realms to conquer. Here is where we meet our heroes, a couple of plumbers named Mario Mario (Bob Hoskins) and Luigi Mario (John Leguizamo), who, in pursuit of a kidnapped new friend in a paleontology student named Daisy (Samantha Mathis), who happens to have the rock in the form of a necklace, find a portal into the Dinohattan dimension. Dangers lurk all around, as the brave brothers must battle the mighty Koopa and his lizard horde to rescue Daisy and thwart Koopa's evil plans to destroy their world.